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Old 04-30-2012, 06:57 PM   #1
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Mass flow air sensor

How do you clean it out and where is it located my rpms are dropping really low when I'm stopped at lights sometimes. A fellow member said that could be the issue. I was thinking of just taking it to the dealer for an emissions service which I know they clean out the throttle body but not sure if they clean that sensor.. Thanks

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Old 04-30-2012, 06:58 PM   #2
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I used to do this on my Mustang, a q-tip and alcohol works for cleaning the sensor itself.

Not sure where it is on the Jeep, should be between the throttle body and air box. On the Ford I needed safety torx bits to remove the sensor from the housing.

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Old 04-30-2012, 07:17 PM   #3
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Quote:
Originally Posted by snikt
I used to do this on my Mustang, a q-tip and alcohol works for cleaning the sensor itself.

Not sure where it is on the Jeep, should be between the throttle body and air box. On the Ford I needed safety torx bits to remove the sensor from the housing.
Hmm I might just take it for an emissions service they clean the throttle body and clean out the vacuum lines and probably clean the sensor for like 150 bucks.
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Old 04-30-2012, 07:20 PM   #4
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If i'm not mistaken, the jeeps use a speed density system. There is no maf on this type of system.
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Old 04-30-2012, 07:26 PM   #5
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Quote:
Originally Posted by TOKKIE
If i'm not mistaken, the jeeps use a speed density system. There is no maf on this type of system.
OP talking about the MAP sensor?
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Old 04-30-2012, 07:28 PM   #6
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Map sensor would be part of the speed density system, but would flag a check engine light i would think. I would think maybe a sticking idle air control valve?
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Old 04-30-2012, 07:32 PM   #7
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most likely the iac,,, idle air control motor,, its part of the throttle body
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Old 04-30-2012, 07:36 PM   #8
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Did not see a MAF on the Jeep. I suspect SD also.
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Old 04-30-2012, 08:42 PM   #9
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Yeah it just randomly drops to about 400 rpms seems like its gonna stall out. Also I've been getting a faint sound of like mables for months but it's getting worse and the hotter the day the worse it is. Sometimes on cold days I won't even hear it.
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Old 04-30-2012, 08:45 PM   #10
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But it mostly sounds like a cat purring loudly when it's faint and mables when it's really going more noticeable from 2-3.5k rpms and only in D not neutral or park. Could this be my catalytic converter going on me? And btw its not an exhaust rattle or anything to do with the heat shields.

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