I just bought a 98 Z28 about a month ago and it runs a little on the rough side so I put a scanner on it and cleared the codes and noticed that the MAF wasnt streaming. I figured the MAF was bad so I took the one off of my 2000 camaro and its still doing the same thing. I checked the MAF plug and it had 13 volts on one wire, 5 volts on one, and nothing on the other. I didn't really have time to get into any real checking yet but I was just wondering if you guys knew a good place to start or what it might be.

 

Bump.

 

Are you testing your connections with the MAF plugged in and the engine running?

 

No, I just unplugged it while the car was running and checked to even see if it was getting power. I haven't really started to look hard yet.

 

If you don't have the points with your ohms meter to pierce the wire casings, get a couple of needles and use those attached to your ohms meter to test signal from wires. Test as close to connection to meter as possible. If you have a dead wire, follow it back, you may find a break or corroded wire there.

 

Yeah, I've got probes. I might look at it a little more tonight.

 

If your MAF was dead, you'd get DTC codes. Do you have any? If so, what are they?

 

I cleared the codes just to start from a blank slate (The car had been neglected for years) and the my buddy realized it wasn't streaming the MAF. I just checked the MAF wires while the car was running and it was plugged in. It was the same as when it wasn't plugged in. Pink(right) wire had 13.8v, left wire had 4.4v, and the center wire was dead. With it unplugged the only difference was 5v on the left rather than 4.4v. The car did charge "tone" just a little when I connected and disconnetcted the MAF. I'm gonna put both MAF's on the other car and make sure they both stream on that car.

 

If the MAF wasn't working, the car would give you a code stating that.

I have no idea what "streaming" is or how one would determine if its happening.

 

Well, wouldn't you know we got a car this morning in the shop... EXACT SAME ISSUE! He needed a new PCM and is on his way. May not be your problem, but I was thinking of you the whole time this went down today

 

When I say that its not "streaming", I mean its not giving me real time data sent from the MAF on the scanner screen. Yeah, I've been thinking its gonna be either the computer or the harness.

 

That's what I was thinking... Its really difficult to tell what the MAF is really sending to the other modules because the bus technology is so... freaking old. I had some scanning software that could collect data faster than the car could push it out of the OBDII port and it made the sensor I was monitoring look like it was dead.

 

What type of scanner are you using to show the data? Is it not showing any g/sec or Hz?

 

We were using a snap-on scan tool. I actually don't remember what unit it was in. I do know that we had the car running and all the other sensors had data feeds and the maf just showed 0.0 no matter what we did.