What were the codes. Just because a part is mentioned in the code doesn't always mean the part is bad.
SOURCE: 1989 GMC 2500 5.7L - engine surges and stalls at idle. Loses power at cruising speed.
Wow you have replaced a lot of stuff. Lets go back to the Fuel pump. When you replaced it did you replace the hose between the pump and the sending unit. These are common for splitting. Have you hooked up a fuel pressure gauge to check what pressure you have? It should be real close to 13 psi and should raise to at least 18 or 19 when you pinch off the return line.
SOURCE: On starting, the 4.7 engine immediately revs to
this is caused by the idle air control valve this handles the idle of the vehicle when first started and adjusts when the a/c is turned on, it is probably caked with carbon you can unbolt it from the throttle body and clean the tip of it and spring on it with carb cleaner also clean inside of the throttle body where it mounts and see if the fixes the problem might have to replace it. find the throttle body it will usually be a round cylinder mounted to the side with a plug in to bolts hold it on.
Testimonial: "Haven't started troubleshooting, but your answer is spot on with other certified mechanics. Checking for vacuum leaks is also recommended. Thanks!"
SOURCE: 2001 Dodge Durango problems with rough idling and stalls.
Hello... Where to go next depends on how the Evap Gross Leak was fixed... Post it...
Thx.
SOURCE: did engine swap on 2000 sonata 2.5 v-6 and am
Fix the Throttle position sensor first, then see if things settle down, without that input, computer has to guess.
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