Bad MAP or MAF
Thread Starter
Racer
Joined: Jun 2006
Posts: 470
Likes: 0
From: Houston Tx
Originally Posted by dpd
what is the symptom??
Drifting
Joined: Oct 2003
Posts: 1,540
Likes: 0
From: bloomfield nj
with the motor off,unplug the maf.start the car,if it runs the maf is bad.if the car starts/runs fine in p or n but stalls as soon as you put in r or d,sounds like a converter clutch problem[stuck/shorted solenoid].if it's almost stalling i'd look at a dirty throttle housing/air leak,etc
Team Owner
Joined: May 2004
Posts: 26,345
Likes: 232
From: SoCal
Originally Posted by dpd
with the motor off,unplug the maf.start the car,if it runs the maf is bad.if the car starts/runs fine in p or n but stalls as soon as you put in r or d,sounds like a converter clutch problem[stuck/shorted solenoid].if it's almost stalling i'd look at a dirty throttle housing/air leak,etc
DH
Former Vendor
Joined: Nov 2000
Posts: 1,140
Likes: 0
From: HOUSTON,TX.U.S.A.
Originally Posted by nitrouscharlie
Out of no where, and maybe a coinsidence, my car started stalling, and when you go to put the car into gear it stalls. Everything else so far is checkinng ouut ok. I'm just doing a little process of elimination. Someone mentioned that I may have a bad MAS, or a bad MAF... And I don't want to turn myself into a parts chaser. I want to fix it right. I'm trying to find sommeone here in Houston who is GOOD with C5 Corvettes.
15350 I-45 North
Houston,TX. 77090
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Instructor
Joined: Mar 2005
Posts: 112
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From: Houston TX
Originally Posted by Dirty Howie
I thought our cars have VE table/SD/MAP so that they do still run if the MAF fails.........
DH
DH
Team Owner
Joined: May 2004
Posts: 26,345
Likes: 232
From: SoCal
Originally Posted by txhorns281
they do, except if the SD parameters haven't been modified to accomodate other than stock configurations, then it will not run well at all. The factory VE airflow model will flood the low end fueling for sure, especially on a big cube/big mod motors and make for some crappy driving, if at all. Also, if you're 01-04, you can't necessarily just unplug the MAF since the IAT sensor is intergrated into the unit, IATs are vital to SD fuel calculations.
DH
Heel & Toe
Joined: Oct 2006
Posts: 23
Likes: 0
From: St. Louis Missouri
if you unplug the maf normally the engine will stumble at idle, it will normally still run but you have to keep some gas on it to keep it running .....and if the maf is bad you will throw a code ....i think its code P0103 for a bad mass air signal ....as for the map sensor you can test the voltages on it although i dont have the actual voltages that they should be but you should be able to find them online somewhere
hope that helps
hope that helps
