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Bad Mass Air Flow Sensor ???


eaglebreath
06-08-2009, 05:06 PM
Does anyone know an easy way to test a MAF to see if its bad or not?
Also will this make your car stall out ? They are quite expensive. I would hate to buy one unless I'm sure.

thanks

1997 lesabre

HotZ28
06-08-2009, 05:28 PM
A scan tool is the best method of testing. It will show air flow in terms of grams of air per second (gps), with a range from 3gps to 150 gps. The MAF sensor produces a frequency output between 32 and 150 hertz.

eaglebreath
06-08-2009, 06:06 PM
Also if it was bad..........wouldn't I get a code??

HotZ28
06-08-2009, 07:58 PM
Also if it was bad..........wouldn't I get a code??You should! Do you have symptoms other than stalling; please give us more details of how & when the stalling problem happens. :confused:

eaglebreath
06-09-2009, 05:51 AM
usually dies when decelerating from 35-50 mph, and I don't have my foot on the gas. It just stops, but It will start right back up while I'm drifting.The only other symptom I can think of is I have to pump the gas pedal to get the car to start
approx. 35% of the time. I do own a DTC scanner and I am not getting any codes.
Any Suggestions??

rustbucket
06-10-2009, 12:24 PM
I had one that was intermittent. Caused dying and run real rough. and eventually couldnt go at all. After starting and dying a few times it threw a trouble code that led me to the MAF. I unplugged it, and I could at least limp home. Opened it up (I thought I would have to order one, so nothing to loose), and I found a cold solder joint (actually a solder ball that was just laying on the contact). I soldered it and glued everything back together. It ran fine for a couple years till I traded the car.

HotZ28
06-10-2009, 01:25 PM
Check the fuel pressure regulator vacuum line for raw fuel (gas)!

eaglebreath
06-11-2009, 12:16 PM
hotz28...........you nailed it. found gas in FPR

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