Grandma has been without her van (1994 Aerostar 4.0 2wd) for 2 month and just now tells me. Ran codes and they all lead me to the MAF, or were old stored from when the fuel pump went out and the shop didnt clear them. Replaced with a JY piece, MAF codes again, so this one seems to be shiznit too.
Currently I have the following KOEO
157- Mass Air Flow signal is/was low or grounded - MAF
185- Mass Air (MAF) output lower than expected - Fuel control
186- Injector pulse width longer than expected or Mass Air Flow (MAF) lower than expected - Fuel control
Every time I have ran KOER I get 111- System checks OK.
What else should I check that might effect the MAF reading/signals?
im a little fuzzy on maf issues but if it runs better with it dissconnected it means thats the problem, right?
Did you clear it all afterward? Did you give it a run then check it?
Yes. I cleared all the codes ever time I checked them. I ran them, cleared them, worked on the issue, test run, repeat.
The original problem was the MAF plug was loose. My grandpa's "mechanic" never ran the codes so he never thought to check it. I am wondering if in the connector or farther down the wires there is an issue.
I just ran it without the MAF plugged in to make sure it would. Really dont want to set my Grandma up to be stranded. Plugged it back in and ran it again. No hesitation/sputters like before. Didnt run the codes again, I know they are still there though.
Going to have her drive it a few days, see if any issue comes back. Told her to unplug it if she does have issue and cannot make it home. If they do come back we are going to try a NEW MAF but I hope she can just save the $80 itll cost her.
No way to test a known-good MA meter in it?