Mass Air Flow sensor bad?
#11
Just a Little FYI...
To dbl check to be sure its the MAF...
Unplug the MAF ...start it up and drive it...
If the problem disappears, Then its definately the MAF...(For testing purposes only) Not recommended to continue to drive with it unplugged...
If the problem persists...Then it has a whole other issue.
To dbl check to be sure its the MAF...
Unplug the MAF ...start it up and drive it...
If the problem disappears, Then its definately the MAF...(For testing purposes only) Not recommended to continue to drive with it unplugged...
If the problem persists...Then it has a whole other issue.
#13
The only thing unplugging the MAF will do is cause the PCM to operate in open loop mode. Since open loop mode also querries the MAF (and it is unplugged) the lack of signal from it will force the PCM to load default tables for the AFR. Because of this the engine may seem to run a little better, but that does not mean that the MAF is bad. Besides, how is unplugging the MAF going to detect bad wiring if that's what is causing the problem?
Would be a quick test to either qualify...or..Eliminate the MAF as the problem...
As far as a bad wire fix?.. The MAF test wont fix a wireing issue..
Thats why I also mentioned he may have a whole other issue...
I wasnt (didnt) go into the open loop explanation...Just trying to Disqualify or Qualify a Bad/Good MAF.
#16
With the reading you got on the 'A' circuit I would check that wire (from the connector back to the power distribution center) for breaks, cracks or abrasion. Pay particular attention to tight bends and where the harness runs close to the body/frame. If the wire checks out okay then replace the sensor.
#20
Were here to help...