94 f150 driveability problem
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94 f150 driveability problem
I have a 94 F150 351, 4x4, E4od with 210,000 miles on it. I have been working on it for awhile now (replacing bad sensors, full tune up and so on) as I get the time and funds to do so. Now the engine starts and idles fairly well (still need an IAC valve) but as soon as I bring it off idle and try to hold a steady rpm it fluctuates about 500-600 rpms. With the MAP sensor vacuum line off and plugged the engine will hold its rpms just fine. If I apply 19 pounds of vacuum to the MAP sensor with a manual pump and rpms held at about 1500 the engine seems to flood out and die. I've replaced the MAP sensor twice now thinking maybe the first one I bought was bad to no avail. Whatever is causing this doesn't flag any codes in the computer (which has also been replaced). Any advice would be greatly appreciated.
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Jmanb13
1968-Present E-Series Van/Cutaway/Chassis
6
Sep 19, 2015 07:48 PM
Flatbed
1987 - 1996 F150 & Larger F-Series Trucks
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Feb 2, 2015 05:07 PM
