smallblockhero58

sorry to hijack the the thread on my deal, but though we could kill 2 birds with 1 stone. im going to post my findings on here until im fixed. if i need to start a thread i will. going tomorrow to get codes, guy has a laptop wiht tthe software. where can i buy a dsl cable for my laptop?

smallblockhero58

Ha guy with the laptop was a fail, couldnt read codes. about broke down on the way there. about to try shoeboxes trick with a obd1 scan tool. will post if i find the code and maybe a fix.

smallblockhero58

alright getting somewhere now shoeboxes trick worked connect pin 5 and 9 to obd1 scan tool- code 48 Mass air flow failure- any takers really that easy a MAF sensor.

Injuneer

The code sets when the PCM does not see any activity from the MAF sensor, when it knows the engine is running.

Check the wiring harness for damaged wires or pins. Then.....

1 - With key on, engine off, harness connector off the MAF sensor, check for 12V between the pink (12V) and black/white (ground) wires in the connector.

2 - Same conditions, check between the yellow wire (signal) and the black/white wire for a reading of 4 - 6V.

3 - If your multi-meter has a frequency range, reconnect, start the engine, and check for a Hz signal between the yellow signal wire and the black/white ground wire. You will see about 2,000 - 2,500Hz at idle.

soonerlover

Not a problem on my end small block as long moderators are cool. I agree as I would love to see what you come up with just in case my "fix" didn't fix it. Please keep updates going. My washers with spacing the ICM has so far worked. Have you tried that? I have ran about 80 some miles with no disasters yet so might be worth looking into that or the coil.

smallblockhero58

well so far so good with the mass air flow sensor seems to idle a lot healthier and drive smooth. just installed 3.73 gear yesterday too, got some noise though oh well, just have to pull it back out.