backfire after warmed up - Team Camaro Tech
Troubleshooting Diagnosing problems done here.

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post #1 of 3 (permalink) Old May 2nd, 09, 04:48 AM Thread Starter
Tech Team
Join Date: Jan 2009
Location: raleigh
Posts: 58
Question backfire after warmed up

My car "was" running like a champ during in town driving. However when I take it out on the freeway for 10-15 miles and run between 65 - 70 mph during that time it starts to hesitate and backfire (both on acceleration and deceleration).

here is what I did so far.
checked wires - ok
checked distributor - ok
put some octane booster in yesterday but have not tried it yet.
changed to electronic ignition about 1 month ago.

Any idea what may be causing this. like I said it was running like a champ (in town driving)


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post #2 of 3 (permalink) Old May 2nd, 09, 05:17 AM
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Dan Ensign
Join Date: Jan 2007
Location: Claverack,NY
Posts: 366
Re: backfire after warmed up

Did this start after the dist. change? What brand dist. did you install? I had similar problem with an MSD, car ran fine cold but once warmed up would backfire and act like it had a 3000 rpm rev. limiter. MSDs website has a good tech. page for problem solving. I ended up sending back my distributor and they sent me a new one.

Dan E.
69 SS396 4spd. 4.10posi. x66 coupe
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post #3 of 3 (permalink) Old May 2nd, 09, 06:13 AM Thread Starter
Tech Team
Join Date: Jan 2009
Location: raleigh
Posts: 58
Re: backfire after warmed up

Never changed distributor. stillusing the GM one.
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