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Hi all new to the site I have a 1990 F150 4x4 new 300 six Gopher engine and have replaced all of the sensors. I had a very fast high idle now i have a slower fast idle. i did the propane test for vacuum leaks. Not sure where to go from here Thanks for the help.
Yes replaced IAC and all the rest of to sensors. Im thinging the person that did my engine did'nt torque my manifold in the rite order. when the engine is cold it works good, when the engine gets hot the pm go's up. Humm hot and cold expanison
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