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Thread: 4.8 spudder with NO cel

  1. #1
    Join Date
    Jan 2014
    Posts
    154

    4.8 spudder with NO cel

    Just got done with my 4l80e swap and got it buttoned up today. Took it on a test drive and it spits and spiders under 4k rpm and no power. After 4k it picks up and goes. Also_), there is no check engine light.
    Any thoughts?

  2. #2
    Join Date
    Mar 2003
    Location
    San Antonio, TX
    Posts
    11,117
    Maybe o2 sensors.

  3. #3
    Join Date
    Jan 2014
    Posts
    154
    That would throw a code wouldn't it?
    What about a vacuum leak? I did have my intake off during the swap and put it back on with the original gaskets It idles around 550-600 rpm in park and its a little rough. Also sounds like pop corn popping in my motor no catalytic converters so it can't be that

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