SD problem

[minytrker]

I have a 02 Z06 with thye 5 wire maf. I can't get to fail and make my light come on for autotune. If I check the codes I have one pending for the maf but not a hard fault. What do I need to do differnt?

[ringram]

What about making some bridge wiring up to disconnect the maf wires. I think Ive seen some info on doing something similar around.

Also its possible it will fail once you have done a few drive cycles with it set to fail. Someone else might be able to confirm this one way or the other.

[bink]

Did you set both the MAF High Freqency Fail 1 {C2901} and the MAF High Freqency Fail Limit {C2902} to "1"?

[minytrker]

I just checked and I had them both set to "0"

[minytrker]

If I have my timing table changed do I need to put it back stock before doing autotune? I put ti back stock and followed the steps in the dyi. So after you get you ve table dialed in with autotune you can go back and change your timing and tune for wot?

[joecar]

My understanding is that during auto ve tuning, you want to avoid knock.

[bink]

I just checked and I had them both set to "0"
Did you change them to "1" and did it help? Just curious how the PCM sees the "0".

:cheers:
joel

[TAQuickness]

if you still can't get the maf to fail, you can use a needle to depress the locks on the MAF wires and pull them from the harness

[minytrker]

Did you change them to "1" and did it help? Just curious how the PCM sees the "0".

:cheers:
joel

I will try it and post the results.

[bink]

I will try it and post the results.
Thanks! :D

:cheers:
joel

[minytrker]

Well Im going to try again tomorrow. Do I have to return my injectors back to stock flow and my timing table back to stock? I would think you want them where they are going to be when you drive normally.

[bink]

If you have stock injectors then you want the stock flow rates (stock table B4001).
If you have higher performance injectors then you should use their respective B4001.
With VE tuning we arrive at the desired final AFR (commanded AFR) by telling the PCM the correct mass of air flowing into the cylinders. If the B4001 table isn't correct then the mass airflow is incorrect - although the final AFR may be correct. Incorrect mass airflow leads to incorrect Timing AND incorrect Idle Airflow.
Correct Idle Airflow is critical. Trust us. ;)


:cheers:
joel

[minytrker]

Thanks. I have stock injectors just the flow rates adjusted, so I will flash them back to stock. So the timing should go back also, right. After I get auto tune done and ltft's are good and I take the car back out of sd, whats next? I never did auto tune, I just adjusted my timing and fuel and wot with my wb on the dyno for max hp. So if I do autotune wouldnt I be back to where I was before I adjusted my timing and fuel on the dnyo.

[minytrker]

Did you set both the MAF High Freqency Fail 1 {C2901} and the MAF High Freqency Fail Limit {C2902} to "1"?

Well I set {C2901} to 1 with no luck. I don't have a {C2902} Any other idea's?

[joecar]

Well I set {C2901} to 1 with no luck. I don't have a {C2902} Any other idea's?

Set C2903 to 1 also.
Set B5001 MAF table to zero all across.