Intake heater light

18 posts · Joined 2009. #3 · Oct 9, 2015. I know you have EFI Live, but for those who don't, I used a load resistor to make sure my CEL didn't come on. I deleted mine and two days later, I had a Check engine light. It was for the air intake heater, so I erased the code, installed a load resistor and yet have the CEL come back on.

Lifesmart - 6-Element Infrared Heater with Front Intake Vent and UV Light does its work. I had lot of health issues due to dryness in my study primarily due to heating through the HVAC. This changed when I bought Lifesmart - 6-Element Infrared HeaterOn older trucks the grid heaters are separate units and can be replaced fairly easily with spacers if you really wanted to, but on a 97 the grid heaters are built into the intake cover. It is absolutely not worth the effort to fully delete them, just disconnect them. 1997 2500 CCLB, NV4500, 3.54s. 389k on the clock.OBD II fault code P0542 is defined as “Intake Air Heater "A" Circuit High”, and is set when the PCM (Powertrain Control Module) detects a high input voltage from, or in the intake air heater circuit. Variations in the input circuit voltage that fall outside of a predetermined range will set a trouble code, and may trigger a warning light.My relays and grid heater is completely gone and if I let it sit on the wait to start light as your normally would, it throws that code. 2006 2500 5.9 G56 Megacab Laramie. BD Intake and steering brace, Banks grid heater delete, S&B intake, King dual stabilizer on 08+ front end, Rough Country 2in lift, 22x14.5 Dropstar wheels, local EFI live ...For some reason all of a sudden my intake heater is not working? Very hard to get the truck to start. The "Wait to start" light still comes on but my volts never drop to around 9-10 like the heater is on. ... My wait to start light comes on for only a very short time also. 1997 2500 Extra Cab long box 4x4, 12v bhaf, 16.5* 5" Exhaust,4kgsk w/60 ...open a can of worms. essentially there have been. a few cases of the grid heater bolt breaking off and finding a home pounded into the top of cylinder 6. the belief is the bolt loosens and electrical current arcs causing it to fall off, or constant elec current arcs causing it to fall into intake.Thanks, 60vette. Purpose is to warm air going from the intake manifold into the engine during starting. It is on when the "Wait To Start" light on your dash is on. Cummins uses it instead of glow plugs. The colder the ambient temperature, the less willing your engine will be to start.

The code is from the relay unplugged. The ECM is not seeing the relay. Try disconnecting the main power cable for the relay instead. The relay will still work. Just no longer supply power to the grid heater. I see no sensors for the grid heater circuit. See what you if any code you get after restoring the relay. Tom.76 posts · Joined 2011. #1 · Jul 30, 2011. I was driving today and the wait to start/glow plug light started flashing along with chimes. Now it's on permanently. Anyone know why that is. All other gauges read ok. No check engine light and truck starts and shuts down as normal. Any help would be appreciated.185 posts · Joined 2014. #5 · Mar 31, 2017. Not sure what bolt it was honestly. Tech just said it came from the grid heater. The truck has not had any engine work performed other than a water pump. After tech said he had seen another 1 that happened under 100k we did ask FCA and was told it was out of warranty and they would do nothing.Yeah i think its basically a glow plug idea for the intake air..Might be a lil harder starting when cold but no biggie.. Im shocked a volvo dealer did have software for it.. craig_sez , Feb 22, 2017This should abort the grid heater cycle and self test that throws the light. Ambient temp and coolant temp can also abort a cycle. For a year i turned the key instantly with the grid heater attached. It would skip the pre heat cycle but i still felt like it was cycling after startup. I can not confirm this 100% though.Mar 2, 2018 · Intake Grid Heater Light Comes On Jump to Latest Follow 2K views 11 replies 8 participants last post by Rogerram3500 Nov 28, 2020 Air ducts are also needed to route the warm air to the intake and electrical connections and wiring control the operation of these components. Trouble code P0542 is triggered by the PCM when it receives a high signal from the intake air heater "A" circuit. The circuit may be out of range, contain a faulty component or have improper airflow.

Grid heater light kicked on while driving. so just got the truck with 170,000 and was perfectly fine ( dealer let me take it home for a few days). Then dealer threw in a smarty programmer he had ordered for it and i set it on level one to start with. I took it down the highway and when cruising at 70 the wts light kicked on and chimed a few times.Great for camping, fishing or hanging outside. By clicking "TRY IT", I agree to receive newsletters and promotions from Money and its partners. I agree to Money's Terms of Use and ...My relays and grid heater is completely gone and if I let it sit on the wait to start light as your normally would, it throws that code. 2006 2500 5.9 G56 Megacab Laramie. BD Intake and steering brace, Banks grid heater delete, S&B intake, King dual stabilizer on 08+ front end, Rough Country 2in lift, 22x14.5 Dropstar wheels, local EFI live ...DTC P0541 stands for “Intake Air Heater “A” Circuit Low,” and it’s logged when the PCM detects a problem with your vehicle’s intake air heater. Bad intake air heaters and relays, a faulty PCM, and wiring problems are some of the issues that could trigger the code. Common indicators of code P0541 include a lit check engine light, a ...I couldn't tell any difference with or without, except for the SES light and battery draw. Maybe if it got real cold here, or if I get somewhere really cold ...The intake heater indicator on the dash came on when the ignition was switched on but then went out after about 3 seconds. Typically it would stay on for 30+ seconds or so before going off. ... and check engine light . Then you will get the IAPCV replaced (if under warranty free) for like $190 for the valve plus trouble shoot time and …

How tall is pilar sanders.

18 posts · Joined 2009. #3 · Oct 9, 2015. I know you have EFI Live, but for those who don't, I used a load resistor to make sure my CEL didn't come on. I deleted mine and two days later, I had a Check engine light. It was for the air intake heater, so I erased the code, installed a load resistor and yet have the CEL come back on.Just started having the intake heater light stay on while driving it all the time also noticed a small amount of white smoke on start up. I've read that it shouldnt be on …MeBucko. 687 posts · Joined 2016. #8 · Mar 17, 2018. The only way I have seen searching the internbet on removing the CEL (code) is by using a EFI live tuner, as it allows you to fool the ECM by setting the input voltage for the intake heater to 0. No other tuner seems to be able to do this.The schematics for the original control can be found in the free electronic manual, page 8W-30-48. It will give you required wire sizes and show you one option for control. The PCM used to control the grounding of the relay coils. Note that the power supply wires used to be 6 gauge. 97 2500HD Club Cab, 4x4, automatic.

Air ducts are also needed to route the warm air to the intake and electrical connections and wiring control the operation of these components. Trouble code P2609 is triggered by the PCM when it detects a performance problem within the intake air heater system. The circuit may be out of range, contain a faulty component or have improper airflow.The intake heater light flashes when the bus is cold however once it warms up, it doesn't come back on until the engine - Answered by a verified Technician808 Posts. Posted - 05/30/2017 : 10:18:04 AM. I have a DT466 that we got back from the dealer . They had to do some work on the engine we installed . There were wiring issues . When we got it back the wait to start light would come on for 5 or 6 seconds and go off . A couple days later went to start the bus the wait to start light wouldn't come ...Features. The Lifesmart Infrared Fireplace Heater brings the warmth and beauty of a fireplace anywhere in your home without needing to be installed. Using 6 quartz infrared elements to produce comfort and heat. Perfect for heating rooms in your home with its 3 heat settings 1000 watt/1500 watt and an ECO mode that maintains a constant 68 degrees.According to the USDA, calorie intake is based on a variety of factors including age, gender, height, weight, and level of activity. The recommended intake for an adult female is a...Mar 5, 2009 · 2004 FREIGHTLINER INTAKE HEATER LIGHT ON ALL THE TIME WHEN VEHICLE IS ON/RUNNING. Answered in 2 hours by: Technician: Diesel Pro. Diesel Pro. Category: Heavy Equipment. Satisfied Customers: 94. Experience: 12yrs exp with CAT/Cummins/Dietroit Diesel/EMD engines.Computer Diagnosis Business.ASE Certified. Verified. Hello Chris, May 4, 2022 ... ... ALL OUT NO HOLDS BAR PART 2 ⛽ . Custom Works•3K views · 19:56 · Go to channel · 7.3L no start no glow plug light. Chris Ward•42K views.Have 91 topkick with 3116 cat engine intake heater was not working. changed switch on engine. Is hot on one side and - Answered by a verified Technician ... i have a 1998 gmc c6500 with a 3116 cat and the intake heater does not work.intake heater light does not come on in dash and i have power to relay beside grid heater.looking for …Left amusement park the other day, driving normally, grid heater light came on. Has stayed on, researched this forum and others, found it could be anywhere from Air Intake Temp Sensor, to injectors. Wrote down the codes everyone that was having the problems had, and took a trip to Oreilly's, here is the codes I have (They don't match any …superman279. 2113 posts · Joined 2010. #17 · Jul 27, 2013. No start when cold (depending on what 'cold' is to you) is more likely injector related. As far as the grid heater light goes, check for codes with the key trick. '03 2500 QCLB 4x4 47RE One Piece Driveshaft.

Apr 11, 2011 · First, the heater should come on every time the key is turned to the on position. Then the Engine ECM checks the coolant and intake air temp and if they are high enough, the heater shuts off. Second, the 12volt power that operates the circuit comes from the truck, not the ECM. The most common reason for the heater not to work is a loss of power ...

T. terrye Discussion starter. 127 posts · Joined 2009. #1 · Jul 5, 2012. The second brown thing back it is either a glow plug relay or the intake air heater relay. It is smoking and hot to the touch (on the brass post and overall). I did air intake heater delete and did some kind of wire with a resistor and stuff but this is kinda scary.813 posts · Joined 2007. #1 · Nov 18, 2009. Started the truck yesterday and check engine light came on. Checked codes with Smarty and there were two of them. They were P2609- No voltage drop seen from intake air heater and P0542- High voltage on the #1intake air heater relay. After checking the codes I noticed that my grid heater is not ...381 posts · Joined 2011. #1 · Feb 10, 2016. Recently had my grid heater replaced due to check engine light and air intake code. Today I started the truck and the heater came on before start and then threw a check engine light. Took it to the dealer and they checked it out, and was the same code as before when the grid heater was replaced.1935 posts · Joined 2008. #6 · Jan 3, 2015. i see you are in texas, you do not need the heaters, the heaters are a epa thing to reduce white smoke at startup. the truck will start at 25* below zero without them. the industrial 5.9's do not have them. 063500dually4X4qcg56,dynatrac,bd exhaust brake,donaldson …Jan 22, 2016 ... And as long as your are doing that it might be smart to put an idiot light in that says you left if on too. 12Vdc. Back to Top. Direct Link To ...TWR. 1940 posts · Joined 2011. #3 · Jan 19, 2016. check the intake manifold air temperature sensor this sensor tells the ECM when to turn the grid heater on by what temp the intake is as i recall anything under 66 degrees it does not turn the heater on anything below 66 at start it turns it on the grid heater.6033 posts · Joined 2008. #10 · Dec 29, 2008. The only other thing to try before buying the sensor is to put it in a heated garage over night (above 50deg.), and see if the ses light comes back on. If is does not than it most likely is the Glow Plug / Intake Air Heater Relay, as it should not be needed above 50deg. Jim.The heater relay is located on the driver side of the engine on top of the intake manifold. It has a black rubber boot covering it for electrical ground protection. when removing relay, disconnect battery ground to prevent electrical shock.Reason being, the relay has power at all times, the relay looks like and old car starter relay with four ...T. terrye Discussion starter. 127 posts · Joined 2009. #1 · Jul 5, 2012. The second brown thing back it is either a glow plug relay or the intake air heater relay. It is smoking and hot to the touch (on the brass post and overall). I did air intake heater delete and did some kind of wire with a resistor and stuff but this is kinda scary.

Army barracks saugus ma.

Fine furniture torrance.

Walk away from the tea lights and the terracotta pot. You probably know space heaters can be dangerous and have to be used very carefully, so the appeal of a TikTok hack for making... P0542 is a diagnostic trouble code (DTC) for "Intake Air Heater "A" Circuit High". This can happen for multiple reasons and a mechanic needs to diagnose the specific cause for this code to be triggered in your situation. Our certified mobile mechanics can come to your home or office to perform the Check Engine Light diagnostic for $154.99 . Nov 12, 2009 · samdweezel05. 1518 posts · Joined 2008. #2 · Nov 12, 2009. If the intake air heater is not working you will get a code. Take the nut off the wire (8 or 10 MM socket) and remove it, and start the truck. The check engine light will come on. If you can read the code it will tell you the intake air heater voltage is low. SLIMLINE INFRARED HEATER – FRONT AIR INTAKE VENT UV LIGHT. MSRP $119. MODEL #HT1154UV. PRODUCT SPECS. Powerful Heating: two quartz infrared heating elements and one smart boost heating elements for faster heat up. 3 heat settings: 1,000w /. 1,500w / and ECO-maintains. a constant 68º. Lifesmart - 6-Element Infrared Heater with Front Intake Vent and UV Light does its work. I had lot of health issues due to dryness in my study primarily due to heating through the HVAC. This changed when I bought Lifesmart - 6-Element Infrared Heater I replaced our 250a fuse once cleared codes and came back. Researched and realized the intake transformer / solenoid for the heater was faulty. A $39 part from Freightliner fixed. Cleared codes and all good. Both are located looking down bath hatch on passenger side left of valve cover. Verify wiring in intake alsonskyline34 Discussion starter. 1706 posts · Joined 2013. #5 · Dec 5, 2023. Well ordered a complete GDP setup - intake manifold, intake horn, and their high flow grid heater. More than I wanted to spend, but the only company that makes them specifically for the C&C trucks and plus I like the idea of the added flow of the intake horn.Power Stroke Tech: Air Intake Heater. The 1999.5-2003 7.3L Power Stroke came equipped with a factory Air Intake Heater (AIH) that can be found in intake tract. The AIH is modulated by the pcm via a relay that is located next to the glow plug relay. This intake heater protrudes directly into the air stream in the cold side of the intake manifold ...Here I show how to diagnose a air intake heater circuit on a Cummins Isc EngineWhen your household water heater fails, it can be a disaster. No hot water can mean no washing up, no showering and sometimes no heating either. So it pays to do your research as t...I wanted to know if there was a constant voltage delivered to the ECM Leads at the intake heater relay? With the key in the on position, I have 12 volts showing at both of the intake heater really positive terminals. Once the Wait to start light goes out, there is a voltage of 3.55V maintained until several seconds after the key is turned off. ….

TWR. 1940 posts · Joined 2011. #3 · Jan 19, 2016. check the intake manifold air temperature sensor this sensor tells the ECM when to turn the grid heater on by what temp the intake is as i recall anything under 66 degrees it does not turn the heater on anything below 66 at start it turns it on the grid heater.Cummins6speed. 5202 posts · Joined 2007. #7 · Oct 15, 2009. I took my cable that goes from the solenoid to the heater off. I sometimes get a code but rarely. When I unplugged the control wires from the solenoid it didn't like it at all and threw 2 or 3 codes. My truck: 06 5.9 6-speed 2/28/09-470hp/980tq Sold and missed.OBD II fault code P0542 is defined as “Intake Air Heater "A" Circuit High”, and is set when the PCM (Powertrain Control Module) detects a high input voltage from, or in the intake air heater circuit. Variations in the input circuit voltage that fall outside of a predetermined range will set a trouble code, and may trigger a warning light.at least three square inches of combustion air-intake area and exhaust outlet area for every 1000 BTUs per hour of heater input ... source of the leak before attempting to light any appliance. C.ays operate the heater with the LP-Gas cylinder in an Alw upright position on a level non-combustible surface.Nov 13, 2014 · 620 posts · Joined 2009. #7 · Nov 13, 2014. The check engine light is probably on because you unplugged the sensors on the intake when you removed it. The remote start is disabled any time the check engine light is on. The cycling is normal I think until the truck warms up. 813 posts · Joined 2007. #1 · Nov 18, 2009. Started the truck yesterday and check engine light came on. Checked codes with Smarty and there were two of them. They were P2609- No voltage drop seen from intake air heater and P0542- High voltage on the #1intake air heater relay. After checking the codes I noticed that my grid heater is not ...Heater feed posts to neg. batt. or engine grnd. show 0.9 ohm. with heater feed cables disconnected. With WTS light on, voltage at heater terminal is 10.6V, then goes to 0 after WTS light goes out. With WTS light out, engine running at idle, voltage to heater feed terminals do not return to 10.6V, or any other positive voltage, After 1 min..Aug 21, 2022 ... ... Intake Heater Delete or if you upgrade to an aftermarket Y-Pipe which also permanently removes the AIH. -uxcell 4Pcs 1156 1141 7506 P21W Light ... Intake heater light, TWR. 1940 posts · Joined 2011. #3 · Jan 19, 2016. check the intake manifold air temperature sensor this sensor tells the ECM when to turn the grid heater on by what temp the intake is as i recall anything under 66 degrees it does not turn the heater on anything below 66 at start it turns it on the grid heater., Homemade Solar Water Heaters - Homemade solar water heaters can help you save money for more important matters. Visit HowStuffWorks to learn all about homemade solar water heaters...., Yeah i think its basically a glow plug idea for the intake air..Might be a lil harder starting when cold but no biggie.. Im shocked a volvo dealer did have software for it.. craig_sez , Feb 22, 2017, Size: 145 124 55mm. For diesel heater which with 25mm Air Intake pipes. 1x Air Filter. The real color of the item may be slightly different from the pictures shown on website caused by many factors such as brightness of your monitor and light brightness., 5 posts · Joined 2017. #1 · Apr 19, 2017. I have an 05 2500 with a stage 2 bd turbo, 90 over injectors and a smarty touch tuner. My grid heater light keeps coming on while I'm driving along with ten dings. It normally comes on while driving 65+ then will go away. I'm not throwing any codes., Specific conditions must be present before the heater is activated: ". • ambient temperature must be below 0 deg C (32 deg F) • engine oil temperature must be below 55 deg C (131 deg F) • vehicle power must be between 11.8 and 15 volts. • parking brake must be applied on manual transmission vehicles., I've grafted a cummins intake heater grid onto my toyota 2L engine to assist with wintertime starting. It works great and I was able to start the engine at 17 F tonight with just the grid heater, no glow plugs. ... Anyway, offhand the wait to start light stays on for about 10 or 15 seconds before going off. Then will cycle for about 3~5 seconds ..., I was also wondering if a person could use the intake air heater relay for the GP relay. My thinking is that the intake air heater relay would last longer than the GP relay. 2002, F-250, 4X4, CC, SB, 116,000miles, 6sp any help and information will be greatly appretiated. 2002 CC 4X4 SB 6sp TS 6 pos. chip triple pillar guage 5"exhuast Tymar ..., T. terrye Discussion starter. 127 posts · Joined 2009. #1 · Jul 5, 2012. The second brown thing back it is either a glow plug relay or the intake air heater relay. It is smoking and hot to the touch (on the brass post and overall). I did air intake heater delete and did some kind of wire with a resistor and stuff but this is kinda scary., open a can of worms. essentially there have been. a few cases of the grid heater bolt breaking off and finding a home pounded into the top of cylinder 6. the belief is the bolt loosens and electrical current arcs causing it to fall off, or constant elec current arcs causing it to fall into intake., Features. The Lifesmart Infrared Fireplace Heater brings the warmth and beauty of a fireplace anywhere in your home without needing to be installed. Using 6 quartz infrared elements to produce comfort and heat. Perfect for heating rooms in your home with its 3 heat settings 1000 watt/1500 watt and an ECO mode that maintains a constant 68 degrees., I have a 2006 Bluebird Vision with a C7 Cat giving me fits. The "wait to start" light is on constantly KOEO or engine running and the grid heater is never activated at cold start up. If I supply power and ground to the solenoid it activates and the heater works as it should, with the signal wires disconnected I have ground on one and 7.2 Volts ..., Ram Year. 2006. Engine. 5.9 Cummins. 2006 ram 3500 5.9 dually. My check engine light for the intake heater came on last year and just now getting around to fixing it. So today I replaced the intake grid heater and the heater relay today and i still have no luck. The relay has 4 terminals on it. Should be hooked up properly., Built in UV-LED light helps kill germs and bacteria. Ideal for rooms up to 300 sq ft. Fan only mode. Tip-over and over heat safety switch. 12 Hours programmable timer. Front intake. Cool touch exterior, i have fl 8o with 3126 intake heater light will stay on or keeps coming on draining my alternator. Answered in 6 minutes by: Technician: Cat Man. Hi. Thanks for using JA! I will try and help you out. The most likely cause of your problem is a faulty Inlet Heater relay. I have seen this before. The relay is located on top of the engine and ..., Water Heater Flashing Blue Light 3/7/8 Times Meaning. Blue Light Flashing 3 Times – This indicates an open draft pressure switch that could be caused by a bad switch, blocked exhaust vent, or a weak fan. Blue Light Flashing 7 Times – Seven flashes means ther is a fault on a flammable vapor sensor., The only way I can get it to start is by planting a 100W light bulb on the air intake heater housing for 1-2 hours. Obviously , the electric air intake heater is not working (despite the "glow plug" light on the dash lighting up for 10 seconds, which it does). The housing does NOT heat up. I've replaced the ($155! from a JD dealer) control module., It has an intake manifold heater activated by pressing and holding the key/switch IN at the run position, right before the start position. Feb 24, 2022 / Air intake grid heater. Thread Starter ... You can confirm …, P2605 is a diagnostic trouble code (DTC) for "Intake Air Heater A Circuit". This can happen for multiple reasons and a mechanic needs to diagnose the specific cause for this code to be triggered in your situation. Our certified mobile mechanics can come to your home or office to perform the Check Engine Light diagnostic for $154.99 ., 163. Wait to start light is not coming on. But engine starts. The wait to start light is for the engine intake air heater. When key is first turned on, all the lights on the dash come on for a couple of seconds, including the wait to start light. But it used to stay on for a few seconds after that, then go off signaling it was time to turn the ..., Great for camping, fishing or hanging outside. By clicking "TRY IT", I agree to receive newsletters and promotions from Money and its partners. I agree to Money's Terms of Use and ..., Features. The Lifesmart Infrared Fireplace Heater brings the warmth and beauty of a fireplace anywhere in your home without needing to be installed. Using 6 quartz infrared elements to produce comfort and heat. Perfect for heating rooms in your home with its 3 heat settings 1000 watt/1500 watt and an ECO mode that maintains a constant 68 degrees., The intake air heater (IAH) is located in the air inlet tube and is used to warm the incoming air to aid in starting the engine and for proper cylinder combustion. The glow plug control module (GPCM) will command the IAH on when the engine coolant temperature is below 140F. 05 Chevy 2500 CCSB., This video walks you through the process of my diagnosis of the intake air heater circuit on my LB7 duramax. I also included the wiring diagram for your diag..., Intake Grid Heater light. Have a 2002 7.3 F-350. Just started having the intake heater light stay on while driving it all the time also noticed a small amount of white smoke on start up. I've read that it shouldnt be on because I'm driving, above 32* F, BLAH BLAH. Wondered if I deleted it would that fix the light or is it a relay problem., Jul 26, 2020 ... ... Lights: https://amzn.to/2XOZvhM Black LED Tail Lights: https://amzn.to/2KdCIUL 3rd Third Brake Light: https://amzn.to/3eA8pFI LED Bulbs with ..., Infrared Heaters. Internet # 328753647. Model # HT1153UV. ... 1500-Watt 3 Element Slim-Line Electric Infrared Space Heater with Front Air Intake and UV Light., P2605 is a diagnostic trouble code (DTC) for "Intake Air Heater A Circuit". This can happen for multiple reasons and a mechanic needs to diagnose the specific cause for this code to be triggered in your situation. Our certified mobile mechanics can come to your home or office to perform the Check Engine Light diagnostic for $154.99 ., nskyline34 Discussion starter. 1706 posts · Joined 2013. #5 · Dec 5, 2023. Well ordered a complete GDP setup - intake manifold, intake horn, and their high flow grid heater. More than I wanted to spend, but the only company that makes them specifically for the C&C trucks and plus I like the idea of the added flow of the intake horn., As a business owner or service provider, improving your client experience should be a top priority. One effective way to enhance client satisfaction and streamline your operations ..., On older trucks the grid heaters are separate units and can be replaced fairly easily with spacers if you really wanted to, but on a 97 the grid heaters are built into the intake cover. It is absolutely not worth the effort to fully delete them, just disconnect them. 1997 2500 CCLB, NV4500, 3.54s. 389k on the clock., Re: CAT 3126B "Wait to Start" Light. « Reply #4 on: October 23, 2012, 05:05:05 PM ». Rod, Certainly sounds like a loose connection or the pre-heat relay/solenoid with the points sticking. Locate the relay. With a voltmeter, check for 12 VDC on the large wire out to the intake heater when someone turn the key on., open a can of worms. essentially there have been. a few cases of the grid heater bolt breaking off and finding a home pounded into the top of cylinder 6. the belief is the bolt loosens and electrical current arcs causing it to fall off, or constant elec current arcs causing it to fall into intake.