MAP Sensor?? Huh.......
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MAP Sensor?? Huh.......
Greetings All. A while back I had the 99 F250 PSD at the stealership for a little assistance and the guy under the hood said that I had an unplugged MAP SENSOR. I said OK and told him to plug it in...which he did FREE of charge beleive it or not. I posted some related info in another post and didn't get any information...but let me rephrase and try again.
Since the MAP sensor has been plugged back in, the truck is completely the same. Driving, power, fuel mileage, etc all the same. I was told in the other post that if I couldn't tell a difference then it was bad. So I want to know (A)WHAT IS A MAP SENSOR FOR (B)HOW DO I TELL WHAT IT DOES?
THANKS!!!!!!!!
Since the MAP sensor has been plugged back in, the truck is completely the same. Driving, power, fuel mileage, etc all the same. I was told in the other post that if I couldn't tell a difference then it was bad. So I want to know (A)WHAT IS A MAP SENSOR FOR (B)HOW DO I TELL WHAT IT DOES?
THANKS!!!!!!!!
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From: Near DC
Bumping this up a bit for the resident guru's to catch.
From what I have read, my thinking is that it tells the engine when to de-fuel, hense, the gadget that fools it. Well, at least one of it's jobs.
Got to be other things, someone will chime in soon.
From what I have read, my thinking is that it tells the engine when to de-fuel, hense, the gadget that fools it. Well, at least one of it's jobs.
Got to be other things, someone will chime in soon.
Fleet Owner
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From: Rio Rico, AZ.
Yes, it reads Manifold Absolute Pressure and sends a value to the ECU. There's a lot of different sensors that the ECU uses to make a good strong running engine and the MAP is one of them.
Medic66 if your MAP has been unplugged you would have a very low powered truck. It should have come to life in a very big way with that connection restored. Something doesn't sound right.
Medic66 if your MAP has been unplugged you would have a very low powered truck. It should have come to life in a very big way with that connection restored. Something doesn't sound right.
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Originally Posted by Kwikkordead
Yes, it reads Manifold Absolute Pressure and sends a value to the ECU. There's a lot of different sensors that the ECU uses to make a good strong running engine and the MAP is one of them.
Medic66 if your MAP has been unplugged you would have a very low powered truck. It should have come to life in a very big way with that connection restored. Something doesn't sound right.
Medic66 if your MAP has been unplugged you would have a very low powered truck. It should have come to life in a very big way with that connection restored. Something doesn't sound right.
Perhaps he was wrong? Perhaps I heard wrong? How do I test it or is their a way to?
Fleet Owner
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From: Rio Rico, AZ.
Well, try unplugging it and see how gutless your truck becomes. I hope that "tech" knew what he was doing! BTW it's the little black unit just to the passenger side of the engine, mounted on a bracket that is held down with three nuts. It has an electrical plug and a pressure hose going to it. To unplug it you need to slide the purple interlock down and then gently pry the release out just a bit and then the plug will come off.
Last edited by Kwikkordead; Jun 25, 2005 at 10:03 AM.
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Other than having a crappy running truck will I damage anything by trying this experiment? I am going to try it this evening probably.
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From: colorado
Originally Posted by mech2161
If it was unpluged it would turn on an SES lamp. It will not hurt anything to un plug it, but it will set a code. You can try the boost line & or the electrical connector.
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Originally Posted by wlihntr
that is correct, if it was unplugged it would have set the SES light, maybe he was talking about the waste gate actuator line, (red line that goes the the turbo) but unless the line was plugged after being dissconnected it would have set the light as well. or maybe it got unplugged it when it was getting worked on??
THANKS EVERYONE!!!