Engine Performance problem
1999 Ford Ranger 6 cyl Four Wheel Drive Manual
hi.I have a 1999 ford ranger 4.0l ohv with 5 speed manual trans. Sometimes when coming to a stop and pressing the clutch in, the rpm's will hang around 1300-1500 and then slowly drop back down around 800.I have a scan tool and noticed that when I release the throttle no matter what the rpm stays at the tps pid always reads around 18.4%. To me that says the throttle plate is closed and not hanging up. LTFT and STFT read in the correct range(between -10%-+10%)
but the maf when the idle hangs up reads 1.1lb per mile, when it idles normally maf reads.55lb per mile. This is a new maf sensor from napa. Is this a defective new maf sensor or am I barking up the wrong tree. Also I know there is a t.S.B. For this but I cannot find the calibration code in the usual places to see if my vehicle is affected. Thanks.
Monday, January 6th, 2020 AT 10:09 AM