Engine Performance problem
1996 Ford Ranger 6 cyl Four Wheel Drive Automatic 210000 miles
My ranger has been idling high for about two months now. I took it to a mechanic who said I had two bad fuel injectors. I bought new ones and replaced them, but my idle was still at about 2500 RPM wheras normally it would be about 1300. Next I was told that it could possibly be the IAC valve and that it could be bad. So I ordered a new one and replaced it. So now I have 2 new injectors and a new IAC valve and it still idles high. Also its running alot louder, and im not sure where this comes into play but its definately noticable.
I took it to yet another mechanic, and he says its an intake manifold leak and that I should replace the gaskets. However, its only idling high when its in park and neutral, when its put into drive or reverse it drops back down to normal.
Ive also checked all the vacuum hoses for a leak and made sure there wasnt a snag on the throttle cable.
Any Suggestions? Thanks.