MAP sensor location
Lead Driver
Joined: Nov 2002
Posts: 9,557
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From: Concord, NC
It may not have one if it uses a MAF sensor. If there is a MAP sensor it will be mounted to the firewall, just to the passenger side of the engine. If there is both a MAP and MAF, the MAP sensor will not have a vacuum line -- it will be open to atmosphere to measure barometric pressure.
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Elder User
Joined: Jan 2006
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Okay, I just sprayed electrical cleaner on the MAF sensor to see if that helps, but it didn't. I pulled a code 72 which is insufficient MAF/MAP change during dynamic test.So I guess I'll have to buy a new MAF sensor. thanks
Lead Driver
Joined: Nov 2002
Posts: 9,557
Likes: 44
From: Concord, NC
That code comes from the operator not giving the throttle a stab after the "goose" flash of the check engine light.
On an unrelated subject, is there anyway we can consolidate some of these threads? A suggestion is located in one thread, then the result of the suggested action is in another, making it a little hard to follow.
On an unrelated subject, is there anyway we can consolidate some of these threads? A suggestion is located in one thread, then the result of the suggested action is in another, making it a little hard to follow.
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Elder User
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I understand what you mean, I just figured asking a different question would require a different thread. Different people answer different questions and may not look in certain threads Sorry for the confusion
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Lead Driver
Joined: Nov 2002
Posts: 9,557
Likes: 44
From: Concord, NC
It's not a big deal, I just thought it might be easier to follow the progression of checks and parts replaced if it were all laid out together chronologically. Since threads get sorted based on the time of the latest response, the timing of events can get out of order pretty easily.
Regardless, I hope that this place has helped you make at least a little progress on fixing your truck!
Regardless, I hope that this place has helped you make at least a little progress on fixing your truck!
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Elder User
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Everyone has really helped out, but unfornately I haven't pinned down a cause for it running the way it is. I repulled the codes off the old PCM(I went back and got it) and got 33, 32, 45, 38( idle tracking switch signal intermitent), 53, 66. Do ya'll know if the air diverter valve goes bad can it cause the engine to run rich. Also can the voltage regulator going bad send to much voltage and not enough voltage to the sensors. I'm trying to narrow it down between the 2. thanks, I'll have to check my other threads, I think Conaski answered that last question. I can't remember
Lead Driver
Joined: Nov 2002
Posts: 9,557
Likes: 44
From: Concord, NC
If the diverter valve is routing the air injection to the cylinder heads while the computer is running in closed loop, then yes, it would cause a rich mixture due to the additional O2 in the exhaust stream.
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