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Thread: 4.8 lost power+knock

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  1. #1
    Join Date
    Jan 2014
    Posts
    154
    95 with 2001 4.8

  2. #2
    Join Date
    Mar 2003
    Location
    San Antonio, TX
    Posts
    11,038
    P0200
    An injector wire issue, possibly.

    102. Maf related. May be a wire or terminal. Pretty common.

  3. #3
    Join Date
    Jan 2014
    Posts
    154
    Got the mass air flow changed out, runs like a champ and the knock went away. But, a ticking sound came back. Over the whole rpm range (idle-wot) hot or cold. Doesn't matter.
    The exhaust isn't hooked up, so there isn't any back pressure so I'm ruling out exhaust leak for the moment, next I'm going to check the rockers. Just changed the plugs, plug wires will be in tomorrow as well as exhaust hooked up. What els can cause a constant tick besides a bad lifter?

  4. #4
    Join Date
    Jan 2014
    Posts
    154
    Well, problem came back. Going to get a new sensor tomorrow. But, I'm not sure if that's my problem or not. Its "went out" about the same time of driving. Probley 10 miles after each sensor it losses power.

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