Code P0101 Mass Air Flow troubles !

[jeff keyuk]

Took car out to get fuel 94octain,Car was running real nice!Next day went with the car, service light came on ,then car fell on it face! Fuel trims seem to cut back. So went back,check code!! P0101Mass air flow came up, went over the whole car, check for vac.leaks, check fues ok! Check grounds,even change the mass air ,same!Check Map senors and even put in a new one, still the same,my question is can bad gas set a P0101 code???

[jeff keyuk]

ttt

[joecar]

No... the MAF sensor and/or its wiring failed.

[jeff keyuk]

Hey joe! Nice to hear from you! I put in my other maf sensor and did the same thing, even change to new map sensor! What do you mean wiring failed??
I check for power going to the mass air and there 12 volts. I am going to post a screen shot of my VE table, Numbers in the low range seem very low!

[jeff keyuk]

[Rich Z]

Man, if my VE table is supposed to look even close to yours, I'm seriously way behind the curve in figuring out this tuning stuff.....

[slows10]

That ve table has to take the cake right there. No offense but that one is scary. Its not just the low areas but the rest of it makes no sense either. Did the car seem to run well with that? Can you post that same screen shot but with the 3d view as well?

[jeff keyuk]

Thanks! table went strange, I work it out, back on track!

[joecar]

Hi Jeff,

I'm fine, glad to see you can take the car out now that winter is gone.


Your VE table does not make sense as Rich and slows noted above... can you post your tune file...

are you running boost...?

if so do you have a 2-bar sensor (VE/MAF tables scaled, or are you running a COS)...?



Before proceeding it pays to visually inspect the MAF wiring for any physical problems, as you have done;

then have a read of this (see Conditions for Setting the DTC): P0101

if the VE table is off by a lot, then the PCM is calculating that the MAF table makes no sense...

[jeff keyuk]

Hi Joe! I went back to the stock B0101 & B0103 tables, Car running much better ! No more P0101 code! Cars LTFT were getting better,car was running better and I felt the IDLE was also getting better,So started back with VE tuning,I think were I screw up is when I connect to the car .The program ask if I want to connect to a nother ECU not my 97/98 ECU and did not noticing it, The table go screw up, Would that sound wright. I more thing There is 2 codes came up last night High and low responce to the o2's, should I leave that table stock for know until I finish with the calca VE tuning. or set the table now to ALL to 450mv.????