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    04 suburban multiple misfire/limp mode?

    Now I can’t recall if I removed the plugs when I did the header install. This problem started about 3 months later. Is it possible it can be damaged spark plugs? Also I didn’t put the spark plug shields back on. Would any of these be the problem?
  2. C

    04 suburban multiple misfire/limp mode?

    I will look into that. I did notice yesterday the chrome top plate on the cone filter came off. Can that possibly be the cause?
  3. C

    04 suburban multiple misfire/limp mode?

    Here are the fuel trim readings at idle if that helps..
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    04 suburban multiple misfire/limp mode?

    Are you talking about the intake manifold or the air intake?
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    04 suburban multiple misfire/limp mode?

    I can’t remember if it was stft or ltft but it reads 25 almost all the time.
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    04 suburban multiple misfire/limp mode?

    Yeah sorry that was my child watching videos in the background. It was accelerating just fine then once it shifted gears it made a popping sound and it seemed the throttle wouldn’t respond after that causing the truck to slow down. At that point I can only drive about 5-10 mph because the truck...
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    04 suburban multiple misfire/limp mode?

    Not sure what the fuel pressure is doing. I replaced the fuel pump last year because one of the lines on the fuel pump was busted so it wouldn’t hold fuel pressure with the vehicle off. I always had to prime it before starting it.
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    04 suburban multiple misfire/limp mode?

    Here is a video to show what is happening..
  9. C

    04 suburban multiple misfire/limp mode?

    Hello, I’m new to the site and hope I can get some help on this issue i have been dealing with for a few months. So I have an 04 suburban with 223k miles. Only mods done are long tube headers and cold air intake. Due to the amount of miles I have changed o2 sensors, spark plugs, spark plug...

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