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Discussion Starter · #1 ·
i wasnt sure what forum to post on,so i will start here. i have a 94 escort,but the engine is a 2.0 from a newer vehicle(i dont know what year the donor engine is). it had a bad tranny and sat a while.i put a tranny in and started to drive it. it runs real rough at idle. and has off and on problems at acceleration and hills .runs fine at highway speeds.i checked the fuel filter and it was clogged so i replaced it,and filled it with new gas. ive also done a compession check and that turned out fine,so im pretty sure it`s not an engine issue.i put my code reader on it and here is what came up :
mass air flow sensor fault,low voltage
hego(ho2s)sensor fault lean
fuel system at rich adaptave limit at partial throttle/system lean
fault in injector pulse width circut?high
im stumped,anyone know what this all means?thanks rob
 

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replace the o2 sensor and clean the MAF sensor and it should cure it. if the o2 sensor is bad it will run rich giving that code, if the MAF is dirty it could also run rich. mine was the same way until i replaced the o2 sensor and cleaned he MAF
 
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