inactiveuser1228

And the saga continues.

Can someone enlighten me on how, if its possible, to test the mass flow sensor on an 87 S-4.

Thanks,
Steve

Jim bailey - 928 International

Unplug it and start the car if it idles and it should ,then the mass air is bad ! or send it to me and I will put it on one of our cars....

inactiveuser1228

Thanks Jim,

I'm headed to the garage. I'll let you know.

Steve

John Speake

Any tests you see in the workshop manuals will only detect a totally failed MAF. The unplug test also only detects total MAF failure. The diagnostics are limited in what they can reveal about a badly aged MAF, because you are looking for errors of just a few %.

Best way to check a MAF is in another car, or on a test jig like the one I have built and calibrated.

The symptoms you describe sound more like a badly aged MAF than a total failure.

Mark

OR...borrow a known 'good' one and install it and see how she runs. I have a spare that I have loaned to a couple of folks, just for this purpose. I'd be happy to let you try it, but I am sure that someone in the SoCAl group has one they'd let you try.