1996 3.8 Cold-Starting Problems - Team Camaro Tech
Troubleshooting Diagnosing problems done here.

 
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post #1 of 6 (permalink) Old Mar 21st, 01, 06:31 AM Thread Starter
 
Join Date: Mar 2001
Location: Mesquite, Texas USA
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My 1996 3.8 V6 Camaro (78,000 original miles) is very difficult to start when the engine is cold (off as little as 15 minutes). I have to give it a lot of gas too. Then it idles really rough for a few seconds before it finally smoothes out. Sometimes get a cloud of blue smoke shooting out the exaust and the odor of gasoline. If I turn the motor off and immediately start again, it starts just fine (like it should). Also having a terrible miss-fire problem that begun shortly after (related or not?).

This problem seemed to happen suddenly about 4 months ago. Doesn't seem to be getting worse, but is getting to be annoying and embarrasing.

Things I have replaced, repaired or tried during the course of this problem:

1. Replaced spark plugs (with original AC Delco)
2. Replaced wires twice (first ones were cheapies)
3. Replaced fuel filter
4. Inspected fuel injectors
5. Replaced battery
6. Fuel injector cleaner
7. Octane boost
8. Higher grade of fuel (different places)

Haven't retrieved code(s) yet, but just wanted to know if anybody has been experiencing similar problems with the GM 3800 series engine and might be able to share some information or suggestions to remedy this problem.

Thank you for any help.
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post #2 of 6 (permalink) Old Mar 21st, 01, 08:17 AM
DjD
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Dennis
 
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You never want to pump the gas or even give it gas to start a car with fuel injection of any kind. That said I think you are flooding it and the wet plugs are causing the mis-fire after it starts.

What happens if you don't touch the gas and just turn the key?

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...Dennis
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post #3 of 6 (permalink) Old Mar 21st, 01, 08:49 AM Thread Starter
 
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Thank you very much for your attention and for responding.

It does the very same thing when I don't give it any gas, but takes longer to start.
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post #4 of 6 (permalink) Old Mar 21st, 01, 05:07 PM
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I would check your coils, ignition module and crank sensor. I would also check your oxygen sensors as well. The 96 3.8 has at least two oxygen sensors. If one of those is bad, it would make your car run bad. Good luck
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post #5 of 6 (permalink) Old Mar 22nd, 01, 06:11 AM
DjD
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I don't really have a grasp on the electronic stuff. Try the items DenRS suggests and if still a problem it might be less expensive to take it to a pro instead of guessing and replacing until you have a whole new engine... Good luck with it and let us know the resolution.

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...Dennis
'69 RS Convertible w/SS trim
'96 Z28SS #1679 of 2410
"The Club"
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post #6 of 6 (permalink) Old Mar 22nd, 01, 12:46 PM
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The temp sensor acts as the choke on a fuel injected engine. You need to take it to someone that has a scan tool and leave it to cool off so they can scan it under those conditions. If you floor a computer controlled engine, it goes in to a "clear flood mode" and won't pump any fuel for a few seconds while starting. Take it to someone and get it scanned.

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