Hej i just get a ranger xlt 1997. Engine only run 80.000km og is auto transmission. My issue is . When im in N or P. the engine reps to Max rpm. About 5.500rpm . But when i drive it only runs up to About 3000rpm there is no lagging or (fuel cutting sounds) runs perfect. It just stop at 3000rpm . And Very Slowly accelerate up to 3400rpm . There is no engine light on ? ( what i understand .. it Should have a rep limit in N AND P. But mine have og in D 1 2 . someone try that? The trans just get renstort in a shop . So i Maybe Think og could be Some vacum issue. It is Also like it dont have eny downkick ... pedal to the metal and og stops at 3000rpm.. good acceleration uo to 3000rpm . Tjem after it very slovly accelerate... 150km/t it is on 3400rpm . please enyone there can Help my . Thx

 

Idling that high is obviously not normal; it sounds like it's got a major air leak in the intake manifold, or the throttle is tuck open. Can you check for these obvious problems?

Do you shift into gear from N or P when it's revving at 5500 rpm? That's really bad for the transmission.

 

My English is not the Best sorry for that.

ITS idlle normally 800rpm. And ITS driving good . But when i drive it Will not passe 3000rpm. It Goes Slowly up in speed but max rpm i can hit when im driving is 3400. But when i hold stil in P or N . I can rep the engine up to 5.500rpm. I Think og Should be different . I have no rep limit in N or P . But when im driving i cant get it to high rpm. Hope you understand . My English sucks so Much

 

Are there other symptoms when you try to drive past 3000 rpm, like stumbling, smoke out the exhaust?

Have you tried running the EEC self-test? That would be the first step for diagnosis. Look here:

https://www.ford-trucks.com/forums/1...an-eec-iv.html

Just guessing now, but it sounds like the engine is not getting enough fuel under load. This could be caused by a weak fuel pump or clogged fuel filter.