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2006 Chevrolet Truck Colorado 4WD 3.5L engine stalls or dies

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05 Oct 2019 16:16 #34039 by Minor
Question on Gm is the driver for the coils set up in the same way the injectors were it shut out if the resistance is too high. The truck is throwing codes P0455 and P0300. but I don't think that's why it's dying while rolling down the road. I think it's a possible injector or coil cause the problem it doesn't do it all the time. It could run 2 maybe 3 days before it happens again.

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05 Oct 2019 16:59 #34042 by BetterCallBrody
I think if the resistance was too high it would throw a code for that circuit?

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05 Oct 2019 22:07 #34047 by Minor
Well, those codes were given by Autozone. I went in and check myself and came up with Po300. Engine miss fire. I also went to the body control module and found some more a B0005 Neutral safety switch and a B2624 dimmer switch problem. Now I wondering since the truck has 200,000 on it if the miss is in the boots on the spark plugs and cause it to die. Cylinder 5 had 300 in history and it show all of them had been missing. SO I guess I start with the simple stuff first clean the throttle body and Mass Airflow, then pull plugs and check out the system for bad parts in the ignition system. I'll see what that looks like.

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06 Oct 2019 23:16 #34060 by John Curtis
How long has the vehicle had the misfire?
If it were a bad coil it would most likely be cylinder specific.

Does the stall happen only when the engine is hot? And when it does will the vehicle start and run?
Do you have live data or a fuel pressure gauge? I’d start with fuel delivery.

Thinking out loud always helps me in the process.

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07 Oct 2019 08:51 #34065 by juergen.scholl
A single cylinder misfire is not likely to make the engine stall.....

Could you share the freeze frame data and elaborate on the conditions when the engine actually stalls, please? Do you know what goes missing when stalling( do you suspect spark and hence the original question?)
Will it restart easily?

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The following user(s) said Thank You: Noah

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07 Oct 2019 09:05 #34066 by autojoe
Gm has tsb relating to carbon buildup on valves. Get some techtron total fuel system cleaner put in 1/2 tank. Also works well on injectors.pull and check plugs. Carbon would cause high compression and lean condition. If you had a scan tool to monitor your fuel trims under load.

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