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Is there any way to test a MAF?

DamianRamesar
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DamianRamesar Member

DamianRamesar

Posted
Posted

I have a 2000 996 c2 and I suspect the MAF has gone bad. On cold start the car struggles to pass 1500 rpm, sometimes 3k rpm. After it warms up it seems to run fine, but i notice a SLIGHT power loss from normal performance above 4000 rpm. I have checked the secondary air injection system and everything checks out. I bought one of those MAF's from ebay a while ago after i got a CEL from my original and it worked fine for a while. Now I'm wondering if that was a mistake. Before I go off and spend $300 on a new MAF from Porsche, is there a way to test it to be certain that it is the problem? I have the durametric cable, I just don't know what to do with the readings. When I remove the MAF plug on cold start, there is absolutely no problem revving or accelerating, but only staying running after dropping from a rev.

  • Admin
Loren Member

Loren

Posted
  • Admin
Posted

Your description sounds like a dirty or bad MAF.

You will need Durametric or a Porsche tester for these readings.

At idle 12-24 Air mass ML in kg/h

No load, n=3,000 rpm 50-80 Air mass ML in kg/h

No load means no AC or heat etc.

  • 4 weeks later...
DamianRamesar Member

DamianRamesar

Posted
  • Author
Posted

Your description sounds like a dirty or bad MAF.

You will need Durametric or a Porsche tester for these readings.

At idle 12-24 Air mass ML in kg/h

No load, n=3,000 rpm 50-80 Air mass ML in kg/h

No load means no AC or heat etc.

Awesome, thanks! I took my OEM Porsche MAF and cleaned it with maf cleaner, and also with a cotton swab (I know it's not recommended) and a lot of dirt came off and it solved my problem!

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