Enging Misfire

Discussion in 'General Motoring' started by Paul L Fisher, Jul 22, 2003.

  1. have a '96 SL2 5 speed with 137,000 miles on it.

    Every once in a while (every couple of days), it misfires. It acts like it
    is hitting the rev limiter even though it is at idle or barely above. This
    only happens when it is stopped. As soon as I step on the gas and start
    moving again, it smoothes out. There is no MIL illuminated.

    I changed the following at 120,000 miles:

    Spark plugs, wires, fuel filter, air filter.

    Both O2 sensors have been changed between 115,000 and now.

    Any clues?

    Paul L Fisher, Jul 22, 2003
  2. Paul L Fisher

    Napalm Heart Guest

    What are you setting the spark plug gap at? (Should be .040")

    Did you arrange the 1-4 plug wires correctly?

    This link might give you some useful information

    Good Luck & Best Wishes,

    Napalm Heart, Jul 23, 2003
  3. Paul L Fisher

    Wurm Guest

    I had the exact same thing, turned out that one of my 4 plugs had died (even
    though they had been changed about 12000 km earlier) so they replaced it and
    the wires and all was good.

    Wurm, Jul 23, 2003
  4. Paul L Fisher

    GoAwAy669 Guest

    Try some good strong fuel injector cleaner.... or get them professionally
    cleaned. Gummed up injectors can cause an engine to miss at idle if it's dirty
    enough becuase the injection pressure is much lower than when at speed.
    GoAwAy669, Jul 26, 2003
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