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I killed a MAF with brake cleaner

  • Deltron
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11 Apr 2019 17:24 #28593 by Deltron
I killed a MAF with brake cleaner was created by Deltron
Today I was chasing an intermittent misfire on an 05 Subaru Forester. P0301, 2, 4 codes. It was a weird one, the stumble/miss would come and go at random. Scoping it looked like a lean/no fuel misfire. I pulled the MAF and it was dirty so I cleaned it with a couple quick shots of brake clean then shake it out, like I always have. Reinstalled MAF and car now starts and dies immediately, every time. You could get it to stay running if you gave it quite a bit of throttle (50%+), but I managed to get an idle MAF reading of 86g/s. Tossed that lump of shit into the trash and the new MAF seems to have solved the misfire.
The following user(s) said Thank You: Noah

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  • Tyler
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12 Apr 2019 14:41 #28627 by Tyler
Replied by Tyler on topic I killed a MAF with brake cleaner
Been in the same situation with a Nissan. :( Lean trims, hesitation, scan data is screaming incorrect air measurement. It's a comeback on another tech, so we can't sell a MAF. I suggest attempting a cleaning, and the boss is all for it. :silly: A shot of brake cleaner later, and the MAF is d-e-a-d. Now we gotta eat a new MAF.

In both cases, I think the MAF was already on the way out. :angry: This is why I hesitate to clean a MAF any more, even with the specific MAF cleaner.

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