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Car shaking, no acceleration, check engine light on

I just put fresh oil, and transmission fluid in the car, got new spark plug wires, and gapped all the spark plugs accordingly. it shakes real bad, and i have no acceleration, like something is dragging on the car.

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  • n1ghtmaresxt
    n1ghtmaresxt Jan 23, 2013

    its a 1998 pontiac bonnevill sle. i checked all the wires to make sure everything was connected right. the problem existed before, and i found one of the wires were coming apart, so i replaced them. it started a few days ago

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  • Cars & Trucks Master
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Year make and model ??
You would need to have the computer scanned for the trouble codes. Was the engine running ok before you replaced the plugs and wires ?
Could have crossed two wires to the wrong cylinders ?

Posted on Jan 23, 2013

  •  Stephen
    Stephen Jan 23, 2013

    Ok, well when you get the computer scanned I can better advise with the codes. Could be many different things including low fuel pressure or coil problems.

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SOURCE: eng. shakes spits/sputters oil in spark plugs

I just had this fixed on my suby today. The cause is that the spark plugs, go through the valve covers on the 2.5 l .When the o rings in the cover go, the result is oil in the spark plugs. The cost of the repair in Canada was about $500 including diagnostics as well as new plugs and wires About 1.5 hours labor and new seals and gaskets. It now runs like new. This is a common problem for this subaru engine as well as for the dodge neon.

Posted on May 23, 2009

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SOURCE: I have a 2003 vw passat 2.8L while changing the

The oil in the spark plug may cause the car to run sluggish. The oil may prevent the spark plug from firing correctly or cause you to burn oil. You may want to replace the oil seals around the spark plug holes by removing the valve cover and you should be able to change the oil seals underneath the cover. While at it check the engine for loose wire connections and loose vacuum hoses.

Posted on Jul 10, 2009

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SOURCE: would bad spark plugs on any car make it shake and

Yes bad plugs/ worn plugs /oiled up plugs/ or HTleads with spark jumping will all cause the engine to run rough,and not idle and when it does it runs rough enough to break the engine mounts.
When its dark at night start the engine and look under the bonnet do you see sparks jumping if yes replace the worn parts if no then check plugs and if light grey there ok /if black through away.
So check it out and let me know how you get on . Ron

Posted on Oct 29, 2009

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SOURCE: car runs but when you accelerate the car sputters

Possibly, but other things can cause the same symptoms. If the check engine light is on, a scanner read of the computer will give you better clues that 'hip shooting' parts replacement can do. Possible things to look for--weak fuel pump, plugged fuel filter, water in the fuel, spark plugs and wiring, O2 sensor, and the list goes on.

Posted on Oct 30, 2009

  • 416 Answers

SOURCE: check engine light

if check engine light is blinking that is from a miss fire have the system checked with a scanner to get a trouble code then you will know what cyl is causing the problem may be a fuel injector or bad compression in that cyl but you will have a better idea where to look

Posted on Apr 09, 2010

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1 Answer

Why is my car shaking


Short answer: If it quits shaking when you let off of the gas pedal, it is likely an engine misfire.

Long answer: I believe your model is new enough for the transmission to have a lock-up torque converter.
At around 40-45mph, the torque converter locks, making a solid connection between engine and transmission.
When this happens, any engine misfire is more readily felt throughout the car during acceleration.
The first items to check would be spark plugs, spark plug wires, and ignition coils. These are most likely to act up under load conditions such as acceleration.

On the other hand, if you let off of the gas pedal and the car still shakes, it is probably a tire or wheel problem.

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When you are standing still and the car is shaking, by touching the accelerator very softly does the shaking stop? If so check the idle control valve.
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Hello;
The problem is most likely break down of the spark plug wires. The demands on the spark during acceleration and load destroy the wires as they age. I would start there. Hope this helps.
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