I'm new here but this site but i have been lurking on here for a while. Ive got a 94 4.0 2wd auto. The truck runs and idles great if you take it easy on it. But as soon as you hit a hill or try to rev it fast it bogs and looses all power and wont pick back up till you let off to about half throttle. Its been doing this for a while and I've tried a new fuel regulator, pump, and filter. I've also checked all the vacuum lines that i know of but still can't solve the issue. any ideas?

MAF, injectors, fuel pump, fuel filter. Start with the filter, and move to the more expensive parts. Clean the MAF, clean or replace the injectors, and finally replace the pump if the issues still arise.

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sorry, re read your OP, disregard what I said pertaining to parts you already replaced.

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so that leaves you with the MAF and injectors.

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okay thanks. I will try the MAF and injectors tomorrow. Thanks for the info.

Thanks for the help obsolete. Today i cleaned the MAF, TB, and some other various sensors. The truck runs way better than it did this morning. Has the power it used to. I also used some seafoam in the tank. Runs great the truck has sit for about 7 months so i think now with some drive time it will bak to 100% thanks for the help again

do a tune up on it ASAP!!! run some more seafoam through. change the oil, filter, plugs, wires, tranny fluid/filter and check the coolant to see how that is. get some new fluids in it. since you did the seafom, your going to have to do an oil change soon any way, like, within the next 300 miles. your truck should run good then

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Why on earth would he want to do all that crap?

NP, glad it worked out for you.

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