Troubleshooting Diagnosing problems done here.

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post #1 of 3 (permalink) Old Jul 25th, 00, 07:15 PM Thread Starter
Join Date: Jan 2000
Location: Owensboro
Posts: 15

Is there any reason for a mass air to go out with in a couple of months. Before I go and replace another MAF sensor I would like to know the reason if any it would go out so soon. Also is there any after market MAF sensors for a 89' tpi system.

Thanks for any suggestions
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post #2 of 3 (permalink) Old Jul 26th, 00, 02:02 AM
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Join Date: Sep 1999
Location: Idaho
Posts: 219

When you replaced the old one, did you remove the screens from the new one to improve flow? That will ruin a MAF if you have any foreign objects contact the sensor wire.

I haven't bought one yet, but I've seen lots of posts about a Wells Mfg MAF sensor, PN# SU-145. Supposed to use a thick film sensor rather than a resistance wire like the OEM Bosch unit. They're around $170 and can be bought from different distributors. A good place to start would be World Discounts at 1-888-288-6728.
The Wells unit supposed to flow around 700cfm where as the stock Bosch unit flows around 550cfm.

67 Camaro LS6 454/TH400/12bolt 3.73
1989 TransAm 5.7L WS6 W/all the options
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post #3 of 3 (permalink) Old Jul 26th, 00, 03:04 PM
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Join Date: Nov 1998
Location: ohio
Posts: 252

There is a deal called a MAF burn off relay that sometimes goes bad. It is supposed to heat up the sensor wire for a few seconds after shutdown to refresh the sensor. I'm no expert on this for sure but it might be worth looking into.
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