91 F-150 help???

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Apr 21, 2007 | 09:27 PM

road_dawg_30

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91 F-150 help???

Just got a 5.0 EFI. puter showed TPS and O2 sensors bad...changed both..truck idles well, put it in gear idle gets rough, accelerate slowly it smooths out, give it some fuel it gets rough again, tries to shake you apart...ran the truck for awhile, left it idle in drive, still idles good and if you accelerate while in park, no problem that you can feel, killed it, won't start until it gets cool. Will try about anything, truck is showing 94,000. has new IAC and good pressure at rail????

Apr 21, 2007 | 09:41 PM

adrianspeeder

Mountain Pass

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From: Dover AFB / Harrisburg PA

What is the pressure?

Adrianspeeder

Apr 21, 2007 | 09:45 PM

road_dawg_30

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right after the truck died it was 45 psi

Apr 21, 2007 | 10:16 PM

andym

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From: Bonita Springs FL

WAY too high. It should be 35 psi. Pull the vacuum line off the fuel pressure regulator. I bet you'll find gas in there, which means it needs to be replaced.