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Thread: Misfire

  1. #1
    LTX Member


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    Brandon Reitz
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    1995 Pontiac Trans Am
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    Default Misfire

    I have a 1995 LT1 that has a rough misfire under load. It has new plugs and wires with barley any miles on it. Optispark was replaced by previous owner probably 10 years ago. I only put 2,000 miles on car since I had it. Fuel is fresh. I had to replace a fuel injector couple years ago and I tested them all at the time.

    The weird part is the misfire goes away only after driving it for like 30 minutes.....

    I'm thinking fuel filter but I don't know where to start after trying that.

    Thanks in advance

  2. #2
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    Shaun
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    Default

    Quote Originally Posted by brarei200 View Post
    I have a 1995 LT1 that has a rough misfire under load. It has new plugs and wires with barley any miles on it. Optispark was replaced by previous owner probably 10 years ago. I only put 2,000 miles on car since I had it. Fuel is fresh. I had to replace a fuel injector couple years ago and I tested them all at the time.

    The weird part is the misfire goes away only after driving it for like 30 minutes.....

    I'm thinking fuel filter but I don't know where to start after trying that.

    Thanks in advance
    Sounds more like a sticking injector that calms down when its been run for a bit and hot.
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  3. #3
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    Brandon Reitz
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    Default

    Surprisingly today I changed the fuel filter and it runs fine now.

    Such an easy fix it doesn't seem real lol.

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