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1996 Impala SS LT1 (Intake backfire) no check engine light

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5 years 2 months ago - 4 months 2 weeks ago #47401 by D250
1996 Impala SS LT1 (Intake backfire) no check engine light was created by D250
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Last edit: 4 months 2 weeks ago by D250.

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5 years 2 months ago #47402 by Cheryl
Replied by Cheryl on topic 1996 Impala SS LT1 (Intake backfire) no check engine light
Popping through the intake is it going lean. How’s the mass air flow sensor look? The old gm you can clean them real easy pop out 4 screws take maf apart clean it. Bet it’s dirty from the j&l filter

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5 years 2 months ago #47403 by Cheryl
Replied by Cheryl on topic 1996 Impala SS LT1 (Intake backfire) no check engine light
K&n

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5 years 2 months ago - 4 months 2 weeks ago #47405 by D250
Replied by D250 on topic 1996 Impala SS LT1 (Intake backfire) no check engine light
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Last edit: 4 months 2 weeks ago by D250.

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5 years 2 months ago #47406 by Cheryl
Replied by Cheryl on topic 1996 Impala SS LT1 (Intake backfire) no check engine light
Well maybe that update. Is the problem? Pcm isn’t programmed for that style??

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5 years 2 months ago - 4 months 2 weeks ago #47407 by D250
Replied by D250 on topic 1996 Impala SS LT1 (Intake backfire) no check engine light
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Last edit: 4 months 2 weeks ago by D250.

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5 years 2 months ago #47409 by Cheryl
Replied by Cheryl on topic 1996 Impala SS LT1 (Intake backfire) no check engine light
How does fuel quality look? Check alcohol content?

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5 years 2 months ago - 4 months 2 weeks ago #47412 by D250
Replied by D250 on topic 1996 Impala SS LT1 (Intake backfire) no check engine light
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Last edit: 4 months 2 weeks ago by D250.

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5 years 2 months ago #47413 by Hardtopdr2
Replied by Hardtopdr2 on topic 1996 Impala SS LT1 (Intake backfire) no check engine light
Popping through intake would be distributor timing, valve adjustment/timing chain or valve spring issue

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5 years 2 months ago - 4 months 2 weeks ago #47446 by D250
Replied by D250 on topic 1996 Impala SS LT1 (Intake backfire) no check engine light
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Last edit: 4 months 2 weeks ago by D250.

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5 years 2 months ago #47451 by Hardtopdr2
Replied by Hardtopdr2 on topic 1996 Impala SS LT1 (Intake backfire) no check engine light
just check distributor timing cause that bolt can come loose or the knock sensor wire can get under the distributor clamp if not being careful

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5 years 1 month ago - 4 months 2 weeks ago #47477 by D250
Replied by D250 on topic 1996 Impala SS LT1 (Intake backfire) no check engine light
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Last edit: 4 months 2 weeks ago by D250.

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5 years 1 month ago #48092 by Hardtopdr2
Replied by Hardtopdr2 on topic 1996 Impala SS LT1 (Intake backfire) no check engine light
well i meant for you to check base timing of distributor advance or retardation of spark timing with timing light. sorry should have made that clear.

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