Idles @ 2100 RPM
#1
#3
#4
The Ford Ranger by design idles high on cold and warm start for a certain period of time. During the winter months my Ranger idles at about 2200 RPMs on cold start and then holds at about 1500 RPMs after 5-6 seconds. And if you have the defroster on, the A/C compressor runs by design and usually causes the engine to idle higher. And if that doesn't help, check for a vacuum leak or any signs of MAF sensor malfunction, because if it is idling high it could be not getting proper airflow readings, causing it to run rich and idle high. I don't know exactly
#5
Yes I would say it is mine did the same thing I have a 94 4.0 5spd and when at idle it would drop to under 500 rpms and almost stall then would spike to 1200 rpms but I haven't seen 2100 rpms I would try the throttle position sensor after I changed mine it ran fine it still idle'ed funny but much much betteri still have to replace the MAF sensor. Sensors are junk on these fords my check engin was on for 3 things all sensors haha
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