engine stumbling

1604 Views 4 Replies 4 Participants Last post by mikde, Oct 8, 2005

mikde

Discussion Starter · Oct 7, 2005

Hello all, I'm a neebie.
I have a 95 LT1 in my 71 olds vista cruiser with a 200r4 trani.
I noticed today for the first time on medium to hard accl. the car stumbles or misses then backfires. Once that happens it clears a little, but is still noticable. On easy acceleraton I really cant feel or here it.
I do have a 58mm t-body and a larger mass air with a cone filter.
Any ideas.
thanks again, mike

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gettinthere

· #2 · Oct 7, 2005

When it comes to an LT1 running bad, step one is check the Opti-Spark.

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Chris 96 WS6

· #3 · Oct 7, 2005

How old is the opti?

Plugs? Wires?

We need more information!

Have you done any troubleshooting yet?

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contraststriker

· #4 · Oct 7, 2005

Man everybody jumps on the opti bandwagon sooo fast. Check for codes, I bet your O2's are acting up...or rather, not acting at all.

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mikde

Discussion Starter · #5 · Oct 8, 2005

Thank you for the help. The opti spark, O2 sensors, and plug were new when the engine was put in. The opti spark is the later part#. I scanned for codes and none showed up.
I have had the car running for 2 years but now its a dailey driver. I live in LA
and traffic sucks. So I believe the miss is new. I have not driven for 1.5-2 hours straight since completion.
Thanks again for the help, mike

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