what are common symptoms of a bad MAP sensor? - JeepForum.com
 
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post #1 of 8 Old 09-21-2012, 10:18 AM Thread Starter
autopc25
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what are common symptoms of a bad MAP sensor?

How common is it for them to go bad?

What are common symptoms of a bad MAP sensor?

Is the MAP sensor something that degrades over time?

Is aftermarket a OK replacement for a MAP sensor or Mopar only?

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post #2 of 8 Old 09-21-2012, 11:15 AM
TheBoogieman
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Symptoms for a bad MAP Sensor would be comparable to an old vacuum advance on a distributor. The timing retards because the ECM thinks demand is low (typical failure is low).I've never had one go bad on any of my Jeeps. Aftermarket one is fine.

http://www.jeepforum.com/forum/f12/s...sensor-655191/

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The little magic fairies I grind up and use for the BMB pads have to be toasted first and that turns them a very dark brown color which produces a near black dust when you brake so it shows up easier.
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post #3 of 8 Old 09-21-2012, 11:44 AM Thread Starter
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Boogie, thanks for the quick reply!
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post #4 of 8 Old 09-21-2012, 01:50 PM
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Quote:
Originally Posted by autopc25 View Post
Boogie, thanks for the quick reply!
Glad to help.

Quote:
Originally Posted by mrblaine View Post
The little magic fairies I grind up and use for the BMB pads have to be toasted first and that turns them a very dark brown color which produces a near black dust when you brake so it shows up easier.
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post #5 of 8 Old 11-22-2012, 07:29 PM
scicero1
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MAP sensor

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Originally Posted by TheBoogieman View Post
Glad to help.
I hope I dont sound like a knob, but symptoms of a MAP sensor could be gas mileage, and other issues. I considered changing mine just to prevent issues. I got a good deal, I work at a store, sometimes its hit or miss, but something this important can help before the code sets off. I just dont kwno where it is
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post #6 of 8 Old 11-23-2012, 03:34 AM
Jonny Jeep
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A bad map sensor or even a small leak at the rubber tube underneath it can cause symptoms similar to a bad O2 sensor and may in some circumstances trip an O2 code. Rough running and gas mileage worsening are potential symptoms.

Online factory service manuals and parts lists - http://www.jeep4x4center.com/knowledge-base/index.htm
If it doesn't work properly, look for the service manual link at the bottom of the page.
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post #7 of 8 Old 05-15-2015, 03:16 PM
martin314
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So if this is true, my map sensor could be bad bc I changed my o2 sensors (upstream) cleaned my throttle body and changed iav sensor and I still have low rpms and will stall when engine is cold then it will run fine for the rest of the time until I leave it over night and start it in the am same problem
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post #8 of 8 Old 01-28-2016, 01:57 PM
crazyndn
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Could this be something similar? Well, in relation to MAP sensor problems. I'm trying to figure this out currently and I think tomorrow will be this angle of attack.

http://www.jeepforum.com/forum/f9/co.../#post33809410
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