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Please help 2008 pontiac g6
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DLA1995
New User
Apr 12, 2021, 5:21 PM
Post #1 of 2
(489 views)
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Please help 2008 pontiac g6
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I have a 2008 pontiac g6 2.4l ecotec vvt with 160000 miles on it. The other day I was driving and I came to stop and out of nowhere the car started idling funny. I pulled into a nearby parking spot and shut the car off. I thought about it for a minute and decided to drive it home (only about a mile and a half). I started the car and headed home and it took forever to build up speed and acted like something was holding it back. I got it home and kept it running and it was idling really weird. I turned it off and it won't start. 2 of the spark plugs had oil all over them. I've replaced all the spark plugs and ignition coils and a valve cover gasket. I'm new to working on my own car and this is really the first time I've ever attempted it from YouTube. I put everything back together and now it still doesn't start. I'm totally lost now. Any help is much appreciated.
(This post was edited by DLA1995 on Apr 12, 2021, 5:30 PM)
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Hammer Time
Ultimate Carjunky
/ Moderator
Apr 12, 2021, 6:06 PM
Post #2 of 2
(477 views)
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Re: Please help 2008 pontiac g6
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You're not going to find your answer from Dr. Google.
You have to systematically find the source of the problem. This is how it is done.
All "crank, no start" conditions are approached in the same way. Every engine requires certain functions to be able to run. Some of these functions rely on specific components to work and some components are part of more than one function so it is important to see the whole picture to be able to conclude anything about what may have failed. Also, these functions can ONLY be tested during the failure. Any other time and they will simply test good because the problem isn't present at the moment.
If you approach this in any other way, you are merely guessing and that only serves to replace unnecessary parts and wastes money.
Every engine requires spark, fuel and compression to run. That's what we have to look for.
These are the basics that need to be tested and will give us the info required to isolate a cause.
1) Test for spark at the plug end of the wire using a spark tester. If none found, check for power supply on the + terminal of the coil with the key on.
2) Test for injector pulse using a small bulb called a noid light. If none found, check for power supply at one side of the injector with the key on.
3) Use a fuel pressure gauge to test for correct fuel pressure, also noticing if the pressure holds when key is shut off.
4) If all of these things check good, then you would need to do a complete compression test.
Once you have determined which of these functions has dropped out,
you will know which system is having the problem.
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We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.
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