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90 740GLE- rough idle with error codes indicating fuel too rich or lean 700

posted by  ReadR on  Sun Jan 18 12:15 CST 2004
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My mechanic is stumped. Replaced Throttle Position Switch, checked EGR, fuel press reg, air mass meter, and others. Error codes are 2.3.2(fuel trim), 1.1.3(fuel trim), 2.1.3(TPS problem), 3.1.2(missing signal from knock sensor). Does this sound like crudded up injectors? (bottle of Techron did not change things) or TPS ground short? Fuel milage down to 10 mpg. Runs fine at higher rpm.






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New 90 740GLE- rough idle with error codes indicating fuel too rich or lean [700]
posted by  ReadR  on Sun Jan 18 12:15 CST 2004 >


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