Engine hesitation
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Joined: Mar 2004
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Engine hesitation
I have a ’97 Explorer sport with 4.0 OHV. The engine has been hesitating during slow accelerations at higher speeds (45-70). In the past two years I’ve changed the plugs and wires, fuel filter, and PCV valve. I had the dealer run a full diagnos on it 2 months ago and they said the K&N filter I installed was clogging up the MAF. That couldn’t be it because the engine was hesitating before I installed the K&N and I’ve tested the MAF and I get good voltage readings. It really likes to hesitate when I give full throttle going up a hill. Any suggestions?
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Joined: Aug 2000
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A faulty or dirty MAF will show up as a lack of power above 2000 rpm. I agree with cleaning it first. If that dosen't help, do a voltage check on the TPS. A search of the forum will get you the procedure. Basically you're looking for a smooth voltage transition on the signal wire when the throttle is advanced.
I would think that electrical cleaner would do a good job on the MAF. Again, do a search, and you'll find several different suggestions on cleaning it.
I would think that electrical cleaner would do a good job on the MAF. Again, do a search, and you'll find several different suggestions on cleaning it.
