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Is America Wrong About Ethanol? Technical Info. 4th Annual Hot Rod Showdown Coverage Car Shows & Events. The Schroll 1932 Ford Coupe’s First Drive Since The 1950s + Full Build Builds and Examples. You should be able to do these checks by yourself if you read the ATS lessons given to you but I would concentrate your effort to check if the voltage reading of the oxygen sensor is not stuck (this will show that the sensor is defective).Ī bad running oxygen sensor can disrupt your fuel mixture and would cause hesitation and loss of power. You can also check these:ġ.) Service the mass sensor for dirty wire elementsĢ.) Check the fuel regulator for diaphragm fuel leakageģ.) Check pcv valve for crack that would cause vacuum leak This sensor seems to be a common problem on this model especially with this code and symptom of hesitation. Next is to check the voltage readings of your oxygen sensor and see if it fluctuates (see ATS courseware). Is this problem serious? Can I fix this myself?įirst and foremost, check first if you have a vacuum leak which can cause your engine to run lean. What bothers me though is when I scanned it, it has code 181 which showed cruising rich and bank 1 lean. I plan to do a major tune up like spark plugs, wires and fuel filter. 
She had the IAC (Idle Control) valve replaced but the problem remains and she asked for my help. When this happens, the engine would also stall and finally quit. My mother's Ford Escort would hesitate only when running at highway speeds as if the engine is running out of gas.
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