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Bad mis and running rich at idle

Tiny
QUADRIDER5961
  • MEMBER
  • 1993 TOYOTA CAMRY
  • 2.2L
  • 4 CYL
  • FWD
  • AUTOMATIC
  • 220,000 MILES
Ihave a 1993 toyota camary 4 cyl it misfires and is running rich u can smell the gas at a idle when u get above 2000 rpms it goes away and runs ok cold or hot it runs the same I did a complete tune up checked the compression its ok no vacuum leaks I can't figure it out
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Wednesday, April 1st, 2015 AT 12:51 AM

3 Replies

Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,867 POSTS
Have you checked fuel pump pressure to make sure the regulator is working and not allowing too much pressure to build? Have you checked the coolant temp sensor which could cause the computer to run the engine rich if it thinks it's colder outside than it is?
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Wednesday, April 1st, 2015 AT 5:33 AM
Tiny
QUADRIDER5961
  • MEMBER
  • 2 POSTS
No I didn't check the fuel pressures. If I disconect the wire that goes to the temperature sender the check engine lite comes on if I plug it back in the lite goes off so does that mean the temperature sender is good?
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Wednesday, April 1st, 2015 AT 8:54 AM
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,867 POSTS
No, that doesn't mean it's good. What can happen is this. If the sensor is sending an incorrect signal, the computer doesn't know it's wrong and accepts is as accurate. Regardless, I would start by checking pressure.
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Wednesday, April 1st, 2015 AT 9:03 PM

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