Re: Engine stumbles with acceleration at low rpm
Thanks bjurke for the reply. I don't think the 04 ranger 3.0 liter has a MAP sensor. Instead it has a MAF, which is behind the air filter. It looks clean, as does the air filter, and I am not seeing a "check engine" light like I would expect with a bad MAF sensor. The plugs looked very good when I replaced them. It really runs great. It starts and idles good and performs well in all aspects of service with that one exception; a hard acceleration at low RPM will produce a couple of stumbles. Once the RPM picks up a little, you can floor it and it will respond flawlessly. Very puzzling. I can't imagine this being a serious issue like a cracked head or even a vacuum leak when it runs so well in most operations. I guess you are right and that I will have to get a scan performed. I tried to get the auto parts store to scan it, but he said that it takes a sophisticated scanner to get any info when you don't have a check engine light on. Reluctantly, I guess this will mean a trip to the Ford Dealer soon. Appreciate your thoughts......Tom
|