ford f150 4x4 idle issues
I have very eratic idle issues than truck shuts off. I have replaced the idle and throttle sensors. also have good fuel pressure. don't know what the problem is?
would almost bet money your vacuum lines are brittle and leaking somewhere. I had an 88 5.0fi, i couldn't find any vacuum leaks. I took off the upper intake and redid every vacuum line I could and it fixed it
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