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MAP help (quick question)

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Old Oct 30, 2008 | 09:30 PM
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From: Somich
MAP help (quick question)

FINALLY got my idle issue figured out. its my map, which is starnge because i was DAMn sure I tried it before. anyways. I unplugged the airline to it and the idle went to normal does that mean I need to BUY a new MAP? or is there a way to clean/fix them??

Last edited by BOOSTscoop; Oct 30, 2008 at 09:47 PM. Reason: ima n00b
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Old Oct 30, 2008 | 09:41 PM
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From: YOKOTA AFB
you can clean them with a q-tip and some rubbing alchol but i would go to napa and buy some maf cleaner and do it with a q-tip. what type/ brand maf are you using? i dont recall having an air line conection to any of my camaro or cobra maf sensors just the electrical plug. i say just put a filter on it or plug it.
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Old Oct 30, 2008 | 09:42 PM
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We have no MAF on our cars. You're probably referring to the MAP sensor. Put a new line on it and make sure to run an inline filter to prevent debris and moisture from getting to it.
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Old Oct 30, 2008 | 09:45 PM
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From: Somich
sorry. im EXTREMELY tires, yes.. MAP sensor.. sorry. but how do i fix it?? i can replace the line but, that wont fix it.. =./ STOCK sensor.
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Old Oct 30, 2008 | 09:46 PM
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From: Somich
on a side note, the MAP in ther rx7 is doubling as the MAF correct? i read about it... i think. lol. i got invited to be in the new rob schneider movie.. 12 hour shoot.. exhausted
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Old Oct 30, 2008 | 10:08 PM
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MAF uses a plunger if you will. This plunger moves depending on air flow. A map sensor measures vacuume and pressure levels. I don't understand what your problem is with your sensor. I assumed when you said you unplugged the line you meant there was a physical plug in the line. If you unplug the map sensor the car will not run "normal." It will either not run or run like the motor is blown...
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Old Oct 31, 2008 | 08:06 AM
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From: Somich
my car would "hunt" during idle. I disconnected the airline and it dropped to normal... and STAYED there. no more hunting
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Old Oct 31, 2008 | 12:16 PM
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From: Somich
anyone, anyone? bueler? bueleR?
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Old Oct 31, 2008 | 12:39 PM
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Arrow

Test it:

https://www.rx7club.com/3rd-generation-specific-1993-2002-16/how-do-i-test-map-sensor-55058/
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Old Oct 31, 2008 | 12:47 PM
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From: Somich
thanks, but I really fail to still understand.. if I figure out how to test it and its bad, does that mean I have to buy a new one? or is there a way to calibrate or repair it? I might be able to locate someone to just let me use theirs for a few minutes so i can see.
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Old Oct 31, 2008 | 12:53 PM
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Originally Posted by BOOSTscoop
if I figure out how to test it and its bad, does that mean I have to buy a new one?
Yes.

Originally Posted by BOOSTscoop
I might be able to locate someone to just let me use theirs for a few minutes so i can see.
That's an easy way to verify a problem without needed to do the exact tests. Plus, it only takes a minute to swap one in.
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Old Oct 31, 2008 | 12:56 PM
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From: Somich
yea man, its 1 bolt, 1 electrical plug and 1 vac hose... literally a 3 minute change. im just trying to find the factory MAP for sale, ill ive found is the gm 3 bar and a bunch of random 3rd party makers. thanks a lot for your help Mahjik
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Old Oct 31, 2008 | 01:10 PM
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FWIW,

Here are the results from my '94's MAP sensor test back in 1995, done with a MityVac and multimeter:

MAP Sensor Characteristics

With Ignition ON –

Condition.......................Spec.............. .......Measured

19.7” Hg vacuum.......1.25 – 1.55 V..........1.18V (@ 20” Hg vacuum)
0” Hg (atmos)............2.38 – 2.78 V..........2.68 V
14.3 psi pressure........4.35 – 4.65 V.........4.58 V

Last edited by wstrohm; Oct 31, 2008 at 01:14 PM.
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