1987 Toyota MR2 4th cylinder won't fire

150,000 MILES • 4 CYL • 2WD • MANUAL
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SKPLATINUM
  • MEMBER
  • 1 POST
I cannot get the 4th cylinder to fire. It has good compretion, and there was a leak at the intake, but I have fixed that, but still cannot get that cylinder to fire. When I remove the spark plug wire the engine continues to run, with no noticable change. The car has no power at all, I have to push the pedal all the way to the floor to make the car move at all. the spark plug works, I have moved it and tested it and it works fine, I have also checked the wire, and tested it, the fuel rail is also functioning, and is expressing fuel, so I am at a loss as to what else could be wrong.
Jan 18, 2008 at 6:19 AM
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MHPAUTOS
  • ✓Experienced Mechanic
  • 31,937 POSTS
Hi there,

Attach a vacuum gauge to the engine and take a reading at idle, post your findings.

Mark (mhpautos)
Jan 18, 2008 at 7:50 PM
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