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Mass Air Flow Sensor - good or bad? 850

posted by  meatfingers on  Thu Dec 6 07:54 CST 2007
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last visit: Tue Dec 11 01:44 CST 2007
[RELATED]

Ksg,
Thanks for taking the time to read over my dilemma. After much procrastination I finally did purchase a fuel pressure gauge and along with a fuel injector test unit I tested the fuel system. I did report it in one the now over 20 threads. For your interest I concluded that the pressure is fine. System pressure was ok, it built up quickly and held. Residual pressure held at 40 psi for over 30 minutes. The pressure regulator seems to respond fine to vacuum input and is not leaking. The fuel injector test procedure seemed conclusive that they are not leaking and working fine.

I was concerned about the MAF sensor,given the difference in value between the spec between the #1 and #4 terminals of 110 ohms and mine of 23.9K ohms. (originally I thought I measured 750omhs but I made a mistake) However, I just returned from a Volvo scrap yard and measured a used MAF sensor which - showed 29K I am not not so sure.

You are correct in your understanding that the once the car starts it runs just fine if not great! Idle accelerates and gets good mileage. And always starts unless it is left in the cold for over 6 hours.

I appreciate your input and I must be missing something.

David






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