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tommy
tommy 5/1/2010
1986 Mercedes Benz 420SEL Base 8Cyl4.2L - Engine
THE ENGINE WHEN I PUSH DOWN ON THE GAS PETAL THE RPMS GO,S UP THAN DROP WILL NOT PICK UP SPEED
2 Answers
  • Nissan Technical Advisor
    What you mean here is that you're pressing hard the acceleration pedal, but the output speed is not desirable? Usually the causes of this are; the fuel filter is blocked as well as the air filter, the ignition timing is incorrect, uneven or low cylinder compressions, the fuel injectors are blocked, the brakes are binding and a low fuel pump delivery.
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  • Mikhelin
    Mikhelin 11/2/2010
    look in transmission sensor...Its in all about Transmission. You mentioned the engine is strong but weak speed, common to blame in drive train. don't keep drive too long..it will explode transmission. i hope you have a lot of money to afford.
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