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Rough running engine

Tiny
JAMES OAKLEY
  • MEMBER
  • 1992 TOYOTA COROLLA
  • 4 CYL
  • 2WD
  • AUTOMATIC
  • 232,000 MILES
1992 Toyota corolla running rich and no power spitting and sputtering until high rpms then cleans up pulled pcv valve filthy changed it while vaccum line was pulled seemed to run a little better changed plugs checked cap and rotor and wires. Stumped
Tuesday, July 19th, 2011 AT 12:44 AM

3 Replies

Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
Probable causes of an engine running rich are as follows:

1. Excessive fuel pressure can be cause by restricted fuel return line
2. Defective Oxygen Sensors.
3. Leaking injectors and fuel pressure regulator.
4. Coolant temperature sensor out of calibration.
5. Restricted air intake system.
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Tuesday, July 19th, 2011 AT 2:31 AM
Tiny
JOANNE MORRISON
  • MEMBER
  • 1 POST
Hi mate, I've been through all this myself at considerable expense eliminating all the above mentioned causes. In the end, by fluke I discovered that the problem was the fuel sender plug which is located under the back seat. Go figure.
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Wednesday, December 7th, 2022 AT 7:09 AM
Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 42,895 POSTS
Excellent addition to this thread! Please feel free to use 2CarPros anytime!
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Wednesday, December 7th, 2022 AT 10:11 AM

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