air meter sensor (MAF) and processor?
Post Fiend
Joined: Mar 2002
Posts: 19,402
Likes: 38
From: Bonita Springs FL
Start over.. we can't help you fix your problem if we don't know what's going on. What's wrong with your truck? What codes did you get? How did you pull the codes? If you got a code for a mass air sensor then something is seriously wrong. A speed density computer shouldn't even be able to throw that code.
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Senior User
Joined: Jan 2009
Posts: 179
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runs rough and stalls when cold idles at 500rpm and the trans shifts hard and drops out of od (the OD light does not come one)
i got 11, 24, 26, and 81 for codes
i got them by jumping the self test port like it said on fordfuelinjection.com
i got 11, 24, 26, and 81 for codes
i got them by jumping the self test port like it said on fordfuelinjection.com
Post Fiend
Joined: Mar 2002
Posts: 19,402
Likes: 38
From: Bonita Springs FL
This is why it's important to know whether these are KOEO, CM, or KOER codes. 
From the first two codes I'd say that the engine wasn't warmed up when you ran the test. It also sounds like you could have a bad vacuum leak. You might also start with cleaning the throttle body out really good and cleaning the IAC valve.
From the first two codes I'd say that the engine wasn't warmed up when you ran the test. It also sounds like you could have a bad vacuum leak. You might also start with cleaning the throttle body out really good and cleaning the IAC valve.
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Senior User
Joined: Jan 2009
Posts: 179
Likes: 0
they where KOEO and the last one showed up when it whent through the CM codes
and it was cold at the time. it was night and my naighbors are sensitive with noise
where is a good spot to put a vac guage? do not want to remove an important line
and it was cold at the time. it was night and my naighbors are sensitive with noise
where is a good spot to put a vac guage? do not want to remove an important line
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Post Fiend
Joined: Mar 2002
Posts: 19,402
Likes: 38
From: Bonita Springs FL
The best place to put a vacuum gauge is to find an unused port on the vacuum tree on the intake manifold and put a piece of vacuum line on it. If there aren't any unused ports you can use the fuel pressure regulator line.
You have to warm the engine up all the way before you run the test.
You have to warm the engine up all the way before you run the test.
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