986 Forum - The Community for Porsche Boxster & Cayman Owners - View Single Post - Vacuum leak - smoke test shows smoke coming from under the air oil sperator

Vtx531 · 09-24-2019, 06:41 AM

Well here is this morning’s tinkering...

I took out the MAF and cleaned it. Reinstalled it and reset the ecu. Short term fuel trims were pegging at +25%. I am guessing that is the maximum it can do. Car had no power, hesitation, ran badly.

Then I unplugged the MAF and it ran great and never go above +10% on the short term fuel trims.

So I am thinking MAF sensor and hopefully it is not an issue with the MAF wiring.

09-24-2019, 06:41 AM	#37
Vtx531 Registered User Join Date: Aug 2019 Location: Mi Posts: 69	Well here is this morning’s tinkering... I took out the MAF and cleaned it. Reinstalled it and reset the ecu. Short term fuel trims were pegging at +25%. I am guessing that is the maximum it can do. Car had no power, hesitation, ran badly. Then I unplugged the MAF and it ran great and never go above +10% on the short term fuel trims. So I am thinking MAF sensor and hopefully it is not an issue with the MAF wiring.