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1986 Pontiac Grand Am

Tiny
AIRPRINCESS
  • MEMBER
  • 1986 PONTIAC GRAND AM
Shakes or Wobbles problem
1986 Pontiac Grand Am 4 cyl Automatic 160, 00 miles

wE HOOK THIS UP TO A MACHINE AND IT SAYS THE #4 CYLINDER IS MISFIRING. WHAT DOES THIS MEAN AND IS IT EXPENSIVE TO FIX?
I ALSO SMELL A GAS SMELL- MAY BE SEP PROBLEM BUT DID NOT SHOW UP ON MACHINE
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Sunday, March 16th, 2008 AT 1:59 PM

1 Reply

Tiny
SERVICE WRITER
  • MECHANIC
  • 9,123 POSTS
The misfire on the fourth cylinder can be caused from various sources. This may be the source of the fuel smell as the fuel may not be getting burned on that cylinder.

Try swapping the fourth and second cylinder plugs to see if the misfire moves to the 3rd cylinder.

What is the 8th digit of the VIN? This may be a quad 4 motor which canl complicate things a little.

There may not be spark plug wires on it. IF there are, swap the fourth and third plug wires.
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Sunday, March 16th, 2008 AT 2:26 PM

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