Pcm???
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4wd Low
Joined: Nov 2023
Posts: 14
Likes: 3
Pcm???
I have a 94 f150 4.9 not start I have replaced both fuel pumps and filter and all injectors and injector pressure regulator and intake gasket and plugs and wires and idle control valve and throttle postion sensor and distributor cap and button and intake control sensor the truck won't start I got 50 psi with koeo and 45 with koer when it decides to run. I can unplug map sensor and idle control valve when it's running and it will stay running but If you give it gas it will bog down and I tried to pull codes with obd1 reader and use the jumper wire method but won't flash any codes I'm thinking it's the pcm trk has 222000 miles on it..please help
Hotshot
Joined: Feb 2015
Posts: 17,559
Likes: 1,081
From: Central Delaware
Wow. Welcome to FTE. I'm going to point you to the "Older, Classic and Antique Trucks" forums and the, "Miscellaneous" forums. The folks in the, "1987 through 1996" subforums can probably help. Then too the folks that habg out in the Miscellaneous, "Fuel Injection, Carburation and Fuel System" sub forum may be better. Post your problem in both areas and sit back and enjoy the help.
Don't forget your state chapter too. Sometimes, the expert is right around the corner.
Don't forget your state chapter too. Sometimes, the expert is right around the corner.
FTE Community Team
Joined: Jan 2019
Posts: 10,769
Likes: 1,506
I wouldn't condemn the PCM right away. To me, this seems like it can't see the throttle position change when you open the throttle . . . or maybe it can't adequately measure intake air volume. Post the same over in the forums that @pbsdaddy mentioned above, and you should see some responses pretty soon. The "1987 - 1996 F150 & Larger F-Series Trucks" forum has the most activity of the bunch. When you post, be sure to note if all of the parts replacements were after the problem started or before. This will help narrow down the cause more quickly.
Welcome aboard!
Welcome aboard!
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WhiskeyBentAndHellBound
1997 - 2003 F150
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Dec 27, 2021 10:03 PM
