Rough running engine

1992 TOYOTA COROLLA
232,000 MILES • 4 CYL • 2WD • AUTOMATIC
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JAMES OAKLEY
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  • 1 POST
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
Jul 19, 2011 at 12:44 AM
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RASMATAZ
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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.
Jul 19, 2011 at 2:31 AM
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JOANNE MORRISON
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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.
Dec 7, 2022 at 7:09 AM
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STRAILER
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Excellent addition to this thread! Please feel free to use 2CarPros anytime!
Dec 7, 2022 at 10:11 AM
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