Join Date: May 2014
Location: San Andreas Fault Zone
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Re: Rich fuel mixture help
Possibly just water in the MAF sensor or MAF sensor connectors which is erroneously indicating to the ECU that there is more air entering the engine than actually is, and the ECU is commanding excess fuel.
Remove the MAF and clean it carefully, and de-mate the MAF connector and blow out both halves with clean, dry comoressed air.
Also, de-mate the connectors at all four of the exhaust gas sensors and blow out the connectors with compressed air.
But, much more info is needed to perform any kind of useful diagnostics.
1. What year model?
2. Original or aftermarket air cleaner system?
3. Have you verified that the engine air filter(s) are not water saturated?
4. How many miles on the odometer?
5. Have any or all of the exhaust gas sensors been replaced?
NEVER, EVER PRESSURE WASH THE ENGINE CMOARTMENT OR ANY PART OF THE WIRING HARNESS WITH A HIGH PRESSURE WASH SYSTEM
All the electrical connectors are “sealed”, but a 2,000 PSI pressure-washer will force water (or worse, detergent solution) past the seals, where it will stay and immediately cause false readings from sensors, or it will sit there for weeks or months, slowly causing corrosion
Last edited by FJtest; 09-21-2019 at 06:53 AM.