1997 P0102 no clear answer
Thread Starter
Racer
Joined: Sep 2005
Posts: 344
Likes: 0
From: Duncanville Texas
1997 P0102 no clear answer
have a 1997 showing a P0102 maf circuit low input. Idle is nuts car falls flat on it face when accelerating.
Has aftermarket maf
Ground and power inputs are good.
Yellow output to ecm wire is showing only. 600 - .680 volts.
Could not check frequency coming out of maf on same wire.
Grounds for the ecm are ok
no acid on the harness problem
What do you guys think about it?
I have a stock maf im going to try in the morning
Has aftermarket maf
Ground and power inputs are good.
Yellow output to ecm wire is showing only. 600 - .680 volts.
Could not check frequency coming out of maf on same wire.
Grounds for the ecm are ok
no acid on the harness problem
What do you guys think about it?
I have a stock maf im going to try in the morning
Safety Car
Joined: Dec 2004
Posts: 3,526
Likes: 20
From: Santa Fe TX
Safety Car
Joined: Aug 2000
Posts: 4,933
Likes: 30
From: San Rafael CA
The after-market MAF is most likely the problem. Without extensive "tuning" of the PCM to match it, the MAF is reporting incorrect air mass readings .... which leads to poor idle, poor acceleration ..... and often surging while trying to maintain a fixed speed.
Take the after market MAF and use it as a paper weight .... that's all they are good for ......
Tech Contributor
Joined: Dec 1999
Posts: 32,910
Likes: 2,402
From: Anthony TX
CI 6,7,8,9,11 Vet
St. Jude Donor '08
C4forlife
I had a Granitelli MAF with high flow MAF ends on my 98. I had ZERO issues with the MAF,,,it threw ZERO DTCs with it and I actually had a SOTP performance increase. So,,,,all aftermarket MAFs are not bad. My PCM was never tuned. Im very sure people have had issues but MAF tuning should correct that issue.
If your having MAF issues,,,make sure the MAF connector is in good shape the wires are NOT broken inside the connector and the "FEMALE " pins in the connector actually make proper connection with the MALE pins inside the MAF.
BC
I had a Granitelli MAF with high flow MAF ends on my 98. I had ZERO issues with the MAF,,,it threw ZERO DTCs with it and I actually had a SOTP performance increase. So,,,,all aftermarket MAFs are not bad. My PCM was never tuned. Im very sure people have had issues but MAF tuning should correct that issue.
If your having MAF issues,,,make sure the MAF connector is in good shape the wires are NOT broken inside the connector and the "FEMALE " pins in the connector actually make proper connection with the MALE pins inside the MAF.
BC
Thread Starter
Racer
Joined: Sep 2005
Posts: 344
Likes: 0
From: Duncanville Texas
found it
found the issue the other day. Turns out when the motor was rebuilt by previous owner the wiring was routed incorrectly around the right side exhaust pinched and burned the crap out of the wiring. All fixed up now. Initially after the repair threw a few codes that didnt even have anything to do with the repair but after clearing once no problem. Thanks to everyone who contributed.
Safety Car
Joined: Jun 2004
Posts: 3,584
Likes: 780
From: panama city beach florida USA
St. Jude Donor '09
found the issue the other day. Turns out when the motor was rebuilt by previous owner the wiring was routed incorrectly around the right side exhaust pinched and burned the crap out of the wiring. All fixed up now. Initially after the repair threw a few codes that didnt even have anything to do with the repair but after clearing once no problem. Thanks to everyone who contributed.
Thread Starter
Racer
Joined: Sep 2005
Posts: 344
Likes: 0
From: Duncanville Texas
weird result
now the weirdest thing. It shows that its running lean across the board on both banks and a couple of other weird things that dont make sense. Intake came off on in order to reach the damaged wiring so probaly should check that out first.
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