Fluctuating Revs/Rough Idle
08-27-17, 03:17 PM
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Fluctuating Revs/Rough Idle
91 Soarer 1UZFE
Revs stable when cold, gradually become more unstable as engine warms up. Fluctuation of 200-300 rpm when warm.
Codes 31, 24 - Air temp/volume.
Have done:
AFM replaced - no change
ECU checked - Recapped and tested
Ignition system checked - No shorts, good plugs, coils checked
Air/vacuum leaks checked - No leaks
Fuses pulled - Fuses fine
Fuel Pump bridged - no change
Suspect:
Because it's a temp related issue, either water temp, oil temp or oxy sensors. Value any input from others as to similar issues or fixes. Thanks.
Revs stable when cold, gradually become more unstable as engine warms up. Fluctuation of 200-300 rpm when warm.
Codes 31, 24 - Air temp/volume.
Have done:
AFM replaced - no change
ECU checked - Recapped and tested
Ignition system checked - No shorts, good plugs, coils checked
Air/vacuum leaks checked - No leaks
Fuses pulled - Fuses fine
Fuel Pump bridged - no change
Suspect:
Because it's a temp related issue, either water temp, oil temp or oxy sensors. Value any input from others as to similar issues or fixes. Thanks.
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