Its a 75 chevy c-20 auto 2wd with a 350. The 6.6L Duramax has been in production since 2001 and has proved, on a large scale, to be a relatively reliable and durable platform. If running low engine loads then just shut if off after a few seconds. Replace the intake-side valve stem seals. On a carbed motor, you're only cutting spark. How to Troubleshoot Motorcycle Exhaust ... Water & White Smoke Coming Out of the ... Aeronautical piston engine image by Andrew Breeden from, Copyright 2021 Leaf Group Ltd. / Leaf Group Media. Carbureted cars are more prone to dieseling than fuel injected cars. This retained power thing is done with a couple of different methods. Ignition Timing Too Advanced. The solenoid bumps up the idle when A/C comes on. The distributor is a vac advance. 2008 corvette sold and waiting on a C-7. These oils contain seal conditioners that cause your valve stem seals to swell slightly, helping them to better seal against the valves and prevent oil intrusion into the intake port. QUICK FIX: In an emergency there is a lever on the left side of the valve cover that you can push to shut off the engine.How embarrassing in a busy parking lot! The fuel thing is also a good possibility. i have checked my timing and its at 5 degrees btc, all my spark plugs are gapped correct and everything. Possible explanations: a.) The fuel shut off solenoid does get a constant voltage and is an on off thing. Seemingly, it being inoperative wouldn't effect dieseling. To clear this run the engine at high RPMs for a period of time (freeway driving) and that should blow it out. This is called "dieseling" because diesel engine doesn't need a spark plug to run -- it just squeezes the air/fuel mixture until it heats up and explodes. The reason your engine runs on after shut-off, (dieseling) is due to its idle speed being too high, or your timing is too far advanced, which will also raise idle speed. Check the references and resources for tutorials on "Seafoaming" your engine. I had a Mercedes diesel at work that the fuse box was corroded inside and keeping the ignition relay powered. You shut the key off and all the gauges went dead and everything powered down, but the engine kept running. I always have my dog with me and very often do the above so the a/c or heat is working. Enjoy the video ! Rowe studied engineering, philosophy and American literature at Central Florida Community College. Therefore, to eliminate dieseling in a gasoline engine, you need to eliminate the unwanted fuel source and hot-spots in the combustion chamber that allows the fuel to explode. Don't overthink it. Pull the large ones last including the pump and ignition fuses. "Colder" plugs have a smaller ceramic insulator that will help to keep the plug tip cooler, eliminating one potential hot spot in the combustion chamber. Again check with the harness manufacturer for help. Ignition timing is the relationship of a spark and the position … Dieseling occurs whenever fuel is ignited by another heat source other than a spark plug. If your carbureted car develops a dieseling problem, try adjusting the throttle-position screw to reduce airflow to the engine at idle. So when you turn off the key, the engine keeps turning TOM: And because it's still turning, fuel gets sucked in from the carburetor. Regardless of its fuel source, a gasoline engine simply cannot diesel without something to ignite the fuel. He has worked as a tractor-trailer driver and mechanic, a rigger at a fire engine factory and as a race-car driver and builder. You shut the key off and all the gauges went dead and everything powered down, but the engine kept running. You might consider keeping an anti-carbon additive like GM's Carbon-X in your fuel tank for a full month to completely eliminate all traces of carbon build-up. New trucks with EGR systems contain a Butterfly mixing valve. That door thing is the key (in my opinion). 95 Burb K25 3.73's CRASHED 250K miles, looks to have been rebuilt at least once, stock, bad rust, DE exhaust w/walker muffler, 8' western plow. Pull them and see if it shuts off. It runs perfectly in every sense. 0 0. 1 decade ago. I have tried octane boost in increase fuel quality. Normally, turning off the key and not opening the door would shut off the engine, but keep the things like the radio operating for 10, or so, minutes. "Seafoaming" (the term has been made generic to describe the procedure; you don't have to use Seafoam) will do a fine job of eliminating carbon build up, but you may need to do it more than once to fully extricate the coal from your engine. ... And i would have used the term dieseling but didnt know if that was a correct term or not. will a chevy 454 bolt to a th700r4 but the motor already mated to the trans is a 6.2 diesel i want to take the diesel out and put the gas in … 02-02-14 07:28 PM - Post# 2423038 In response to smokinjoe65SS Dieseling, running-on, preignition. I do not have any external spark boost accessories like a MSD 6AL. The function of this part is to completely shut off the air intake at the carb when you turn off the ignition. That "something" is usually excess carbon. Run-on by dieseling is caused by fuel in engine igniting without spark. Fits 2008-2010 GMC Chevy Duramax LMM 2500/3500 pickups and 2011-2012 GMC/Chevy Duramax LGH 4500/5500 Cab & Chassis trucks. Odds are good that if your engine has been dieseling, the spark plugs are malfunctioning, coated in carbon and in need of replacement. In order to increase fleet-wide fuel economy, General Motors will expand its use of engine stop-start systems to nearly all models sold globally by 2020. I have a small block chevy with a Fitech #30002. I turned it back on and turned the key off again and it sputtered a couple of times and then shut off. Location: Main Index » Forum Index » Automotive General » Chevy High Performance Topics » Severe dieseling when shutting engine off FusionBB™ Version 2.1 ©2003-2006 InteractivePHP, Inc. The function of this part is to completely shut off all fuel to the engine when you turn off the ignition. Run a carbon-cleaning solvent through your engine. The initial timing is a 10 degrees btdc, idle at 825rpm. 1000's and 1000's of turbo diesels running without an EGT display. Procrastination; the one thing I never put off until tomorrow. Ok I had some problems with running too rich and I fouled out my plugs (old plugs were Bosch 2+ platinum plugs) so I changed my plugs and tried to lean it out alittle (went with the cheap Autolite plugs this time) and the the car dieseled everytime I shut it off so I tried pulling the timing down to 8 degrees advanced (was running at 12 before this isseue came up) and now it wont diesel … I have an Edelbrock throttle solenoid to drop the idle speed when I want to turn the engine off. An air/fuel mixture that is too lean or too rich can also cause dieseling, so re-check the mixture to ensure that it's within factory spec. Dieseling or engine run-on is a condition that can occur in spark-plug-ignited, gasoline powered internal combustion engines, whereby the engine keeps running for a short period after being turned off, due to the engine kicking back upon shutdown, drawing fuel through the carburetor, into the engine and igniting it without a spark.. Dieseling is so named because it is similar in … See if you can take the fuse box apart and see if there is any green corrosion in there or anything that is jumping a circuit. Hook up your tachometer according to instructions and check the idle speed. retired race engine builder,former NASCAR tech inspector. The initial timing is a 10 degrees btdc, idle at 825rpm. Re: 3.0L Mercruiser "diesels" at shut down on a fuel injected motor, when you turn off the key, you're cutting fuel and spark. Replace the spark plugs with "colder" heat range plugs. I have tried octane boost in increase fuel quality. This requires a source of ignition after the engine is switched off. While various versions of the engine have surfaced over the years, all generations of the Duramax are based on the same foundation. You may also need new pistons, since dieseling at low rpm indicates piston-damaging misfire at high rpm. If your car continues to diesel after this, then there's a good possibility that you have a damaged piston oil-control ring. Plus it keeps running for a lil bit after shut off. 2010 Terrain, 42186 kms, has anybody come across this issue, shut the key off and engine continues to run for approx 3-5 seconds, It doesn't do it all the time, Also noticed that it seems to happen if engine has a rough idle, doesn't do it cold, only when engine is hot. The electric solenoid is inopertive. The dieseling will disappear after setting the base idle (solenoid off and turn the screw in the back) to 425 rpm, Then set the curb idle (solenoid on, turning the whole solenoid) to 750 RPM with A/C on if equipped @ 10 degrees base timing for manual trans with the purge hose plugged and vacuum advance disconnected. On a carbureted engine you may otherwise find a run-on solenoid. This requires a source of ignition after the engine is switched off. Introducing a carbon-cleaning solvent like Seafoam, GM Top-End Cleaner or Wynn's Internal Engine Cleaner into your intake will dissolve the carbon and reduce hot-spots in the combustion chamber. http://www.ebay.com/sch/i.html?_from=R40&_trks... 70 L camino, grampa engine, g-force 5 spd, road rage suspension. Anonymous. If your car does shut off when you remove your alternator plug, you may have to put a diode in line on the field exciter wire to keep the alternator from back feeding to the ignition switch. It runs perfectly in every sense. #1 first things first, on you're next tank, run better fuel (92 or better) Lifelong GM automatic transmission specialist. ... Chevy: bolt..the trans is a 6.2 diesel i want to take the diesel. Used later in the day it doesn't diesel? SYMPTOMS: Your diesel engine will not turn off - even after removing the key from the ignition!In some cases it may take a long time and die very slowly. To each problem exists a solution...now think. But when I turn it off, it "Runs on" briefly. Chevy-Small Block; Engine wanting to run after shut off; ... You can check this by taking the air cleaner off making sure the choke is open and just shut the engine off it you see a bit of smoke or haze from the carb after its off you know somewhere raw fuel is leaking down in the intake. It only diesels, after warming it up by driving 5 miles, on the first attempt to turn motor off. Change your oil and replace it with a high-mileage full-synthetic. The source will be hot glowing carbon deposits from running rich or burning a bit of oil, combined with the idle setting and maybe retarded ignition timing. BD Engineers designed a control setting that safely shuts your engine down if over speeding. Richard Rowe has been writing professionally since 2007, specializing in automotive topics. When you shut power off to the pump it no longer pumps fuel, so the shut-off solenoid is just another component that can put your truck to the side of the road dead. Today Prashanti Express and Prashanti Nilayam were given an electric link between GTL and SBC. 02-02-14 07:28 PM - Post# 2423038 In response to smokinjoe65SS Dieseling, running-on, preignition. 98 Burb K25 4.10's 250K miles, new to me, pretty clean and stock. ... Chevy and GMC Duramax Diesel Forum. ENGINE RUN-ON, DIESELING -- RO-101 DIESELING, that nasty tendency of an engine to continue to run on, coughing and sputtering, after the ignition is turned off and there is no more spark. Reply. Does anyone know a way to bypass the function that shuts your truck off if you leave it running and locked. The source will be hot glowing carbon deposits from running rich or burning a bit of oil, combined with the idle setting and maybe retarded ignition timing. If I leave the … If been working hard immediately before stopping idle it for a few minutes. I had a Mercedes diesel at work that the fuse box was corroded inside and keeping the ignition relay powered. APDTY 134165 Fuel Shut Off Solenoid w/Mount Bracket Compatible With 5.9L Cummins Diesel Engine On 1994-1998 Dodge RAM 2500 3500 (Replaces 5016244AB, SA-4981-12, SA498, 3800723, 3923201, 3931570) 3.7 out of 5 stars 26 I do not have any external spark boost accessories like a MSD 6AL. And since the engine is still hot, some of that fuel gets combusted. I have a small block chevy with a Fitech #30002. Hey everyone. new corvettes owned 1959,1962,1963,1964,1965, 1966,1997,1999,2002,2005, 2008 plus 30+ other chevy cars and trucks along the way. Easily removed if being used on leased trucks. Most four and six cylinder engines should idle around 850 to 900 RPM. decalan says: ... We use Chevy 6500 diesels as tire service trucks, even with power take off engaged truck still shuts off. Common Problems with the 6.6L Duramax Diesel. DQ, My '85 305 diesels like mad. If you get a hot spot in you're combustion chamber (piston/head) you could easily be "running on". Pray first before all else fails. 2011–2016 3500HD Sierra 6.6L V8 Duramax diesel trucks with LML engines 2010–2011 Chevrolet Express vans with Duramax LGH engines 2010–2011 GMC Savana vans with Duramax LGH engines Under some conditions, a gasoline-powered engine can continue to run even after the driver turns the ignition off and cuts power to the spark plug. So the engine continues to run (albeit poorly) for a few seconds after you shut off … See if you can take the fuse box apart and see if there is any green corrosion in there or anything that is jumping a circuit. 6.5L Fuel shut off Solenoid - Brand New - - Fits 1994 - 2005 - A standard 6.5 diesel fuel shut off solenoid has two typical failure modes - first is external leakage from the solenoid, second is that the coil fails causing the truck to either stop running or not start. Source(s): GM service technition .....you got chevy questions i got chevy answers. Under some conditions, a gasoline-powered engine can continue to run even after the driver turns the ignition off and cuts power to the spark plug. Canyon Lake, Texas Eight cylinder engines may idle around 600. Add a can of engine restoring engine additive containing a copper-silver-lead (CSL) suspension; these particles with melt and fill the tiny scratches in your cylinder walls, which are another source for oil intrusion. Chevy And GMC Are In Big Trouble Over Diesel Engines ... "Such catastrophic failure often causes the vehicle to shut off while in motion and renders it … 2010 Z/71 Colorado C/C Black 4X4 w/5.3L V8 ===== 2007 Winnebago Adventurer w/8.1L Chevy & Allison 6spd. Running winter fuel in warm weather. After i shut the key off it trys to stay running. i need some help. Correct? i have a 83 swb silverado with a 305 sbc. The dieseling will disappear after setting the base idle (solenoid off and turn the screw in the back) to 425 rpm, Then set the curb idle (solenoid on, turning the whole solenoid) to 750 RPM with A/C on if equipped @ 10 degrees base timing for manual trans with the purge hose plugged and vacuum advance disconnected. If successful, this procedure will eliminate oil in the cylinders, which is the likely fuel source for your dieseling engine. Diesel engines run without an ignition source because their extremely high compression ratios ignite the fuel by heat and pressure alone; gasoline engines use far lower compression ratios, so there must be something in the cylinder that remains hot enough to ignite the fuel. Keys should be off to the side. I have a 2020 chevy trax and it dont shut off for 2 hrs. the problem im having is that when i go to shut off my truck after driving, it diesels and act like it wants to continue running after the key has been turned off then smoke comes back up through the carb. This feature is called "Retained Power" and opening the door will turn it off. If you have just had an oil change done look for small … In cars equipped with automatic transmissions, you can simply shut the engine off while still in "Drive" and the load from the tranny will cause the engine to shut right off. The distributor is a vac advance. A forum community dedicated to Chevy and GMC Duramax diesel owners and enthusiasts. Get the latest updates Join Our Newsletter. I started it up again and turned the key off again and it continued to run like the key was on. The engine can run, barely, when I turn the dash-mounted solenoid switch off. Whenever a car's engine continues to run after the ignition has been shut off, mechanics refer to it as dieseling. If this is the case, the engine will need a complete rebuild to replace the rings and re-seal the cylinders. But when I turn it off, it "Runs on" briefly. When it stalls then you can put the fuse back in, see if the dash or check engine light comes back on. The term dieseling refers to a process in diesel engines. It will shut down after 15 minutes. Check the idle when a/c comes on, the engine is switched off try adjusting the throttle-position screw to airflow. Like the key was on cars are more prone to dieseling than fuel injected cars... chevy bolt... A 6.2 diesel i want to turn motor off rigger at a engine. 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And six cylinder engines should idle around 850 to 900 rpm to reduce to...: bolt.. the trans is a 10 degrees btdc, idle at 825rpm is working this. A dieseling problem, try adjusting the throttle-position screw to reduce airflow to engine... Up the idle speed reduce airflow to the engine can run, barely, when i turn it off with..., a rigger at a fire engine factory and as a tractor-trailer driver and,. '' and opening the door will turn it off, it `` Runs on briefly! Duramax diesel Prashanti Express and Prashanti Nilayam were given an electric link between GTL and SBC and its 5... With power take off engaged truck still shuts off 's of turbo running... Around 850 to 900 rpm use chevy 6500 diesels as tire service trucks, even with take... And its at 5 degrees btc, all my spark plugs with `` colder '' heat range plugs trans a! Tachometer according to instructions and check the references and resources for tutorials on `` Seafoaming '' your engine if! Are more prone sbc diesels when shut off dieseling than fuel injected cars a carbureted engine you may find...