raroz28

Mike, shoulda called you a long time ago.

That made it run 100x better. When I punch it at WOT it takes off like a scared cat and there is no pressure on the gas pedal anymore.

WTF? So I need a new MAF?

my1994z28

Thats what it looks like..

cthomson21

Sorry for the waste of money on the MAF cleaner...... I think you can check it with a meter to see if there is some voltage fluctuation, but not sure on that. You could ask Injuneer or someone with more knowledge what that voltage should be..... Or if you have some scanning software and a plug you can check and see what you mass flow rate is into the motor.....Not sure with an OBD2 how easy this is though....

MikeGyver

The MAF spits out a freq from about 1500 - 11,000hz, not voltage.
4th walbro? what's up with that?

Injuneer

I'm still not sure why a faulty MAF would cause an upward pressure on the accel pedal?????

The 97 (OBD-II) should also set a code if the MAF reading is not consistant, within a certain percentage, of the mass air flow calculated using the speed-density method.

raroz28

What would cause the upward pressure? The car feels stronger with it unplugged but perhaps it's just s lightly better but not 100%. I haven't driven it enough to know.

raroz28

It wasn't a waste. I didn't know there was a way to clean a MAF. I think from running with a dirty filter so long, I ruined the MAF. I mean, I took this stock air filter out when I put in my K&N 5 years ago and the filter was dirty then. I put that same stock filter back on 2 years ago and when I took it out I can't explain how filthy it was. It had a broken fuse in it, leaves, and it was super black.

When I had the hood open with the car running it was so fumey and stinky and once I replaced the filter it went away. It just slipped my mind to ever even look at it, I really just forgot about it. I am sure that my MAF is filthy or perhaps I even did permanent damage to it.

raroz28

Just thought I would update this.... I pulled my battery out to put it into another car. It was out for an hour or so.

When I put it back in and started the car out, the hiccup and missing was gone and it was much, much smoother.

The car is running what seems to be 100% and has no misfire whatsoever.

This is strange because after I fiddled with and cleaned the MAF, I pulled the pcm bat fuse for about a minute and put it back in.

Perhaps the PCM just needed a good reset?

Feels good to be back up to power.