DTC's during WOT question

[HartRod]

Background:

6.2/6L80/TVS1900 (7lbs of boost, so far)
ZR1 Map sensor
CompCam 219/235 113 LSA (with dual valve springs)
LS3 MAF
04+ Corvette Pedal

I'm getting the following codes when I do a WOT run:

P0106 MAP system peformance (pending) (immature)
P0121 Throttle position circuit insufficient activity (immature)
P1101 Mass air flow sensor out of test range (pending) (immature)

The truck runs fine. I can clear the DTCs and they won't pop up again unless I do a WOT run. Thoughts or suggestions. I'll post the tune and log later.

[MMGT1]

Is your VE tuned properly in PE mode? You may be "out of range" between the VE tune and the MAF tune causing this.... just a guess without the tune and log of it happening. Usually the P0121 is set when the idle is too low or timing is too low with the addition of a cam. But since it is only at WOT, I would look to the tune between the VE and MAF first. If you keep getting the P0121 then I would either increase the idle or increase the idle timing to get your MAP out of the P0121 range

[HartRod]

Here's the tune. I can't get the log to load because the file is to large.

[C5 2000]

Under Diagnostic Tests PO101,PO106,PO121 change MIN ECT to 493 and Max ECT to -40

[MMGT1]

Yes, that will delete the test if you cannot get your MAP outside the P0121 range. I just would not jump straight to it if it's possible to keep it active.

[HartRod]

Under Diagnostic Tests PO101,PO106,PO121 change MIN ECT to 493 and Max ECT to -40

Thanks.

Yes, that will delete the test if you cannot get your MAP outside the P0121 range. I just would not jump straight to it if it's possible to keep it active.

And I agree, I would prefer not to disable it until I am sure that there is an issue. This is a retrofit, so I'm kinda winging some of it, LOL. Is there a way to reduce the size of the log file after you run it? I guess what I'm asking is, can you cut some of it out so the file is smaller?

[gn2beatu]

I couldnt load the tune now, but also dont forget to max ALL the tables under Engine Diagnostics, General, P0068.

This will keep the limp mode problem from happening when you up the boost. If you dont raise these, you will be flowing more air than the computer will want to see for a given TPS/MAP/RPM.

[HartRod]

I couldnt load the tune now, but also dont forget to max ALL the tables under Engine Diagnostics, General, P0068.

This will keep the limp mode problem from happening when you up the boost. If you dont raise these, you will be flowing more air than the computer will want to see for a given TPS/MAP/RPM.

Did you take a look at my tune? Thanks,

[griffincox]

Yes, that will delete the test if you cannot get your MAP outside the P0121 range. I just would not jump straight to it if it's possible to keep it active.

Is there a way to adjust these ranges to make the computer happy with SD vs MAF vs TPS diagnostics and not disable the tests? They must be different on OE supercharged vehicles. Has anyone requested the tables from HPtuners for any OS? I am pretty sure I am having some of these same issues. I have a nearly perfect VE table and MAF curve but once in dynamic air calc mode the ECM isn't happy with something as soon as pressure is above atmospheric.

[mowton]

Is there a way to adjust these ranges to make the computer happy with SD vs MAF vs TPS diagnostics and not disable the tests? They must be different on OE supercharged vehicles. Has anyone requested the tables from HPtuners for any OS? I am pretty sure I am having some of these same issues. NI have a nearly perfect VE table and MAF curve but once in dynamic air calc mode the ECM isn't happy with something as soon as pressure is above atmospheric.

Disable as advised above and perform a wide open throttle pull from stop to redline. Log the regular PIDs including MAP, RPM, MAF and Dynamic Airflow (for SD tunes). At the ETC Throttle test (P0068) rpm breakpoints, note the airflow value and add 10%. Put this value in the tune cell. Do this for all axis points. Do the same for the Airflow delta (interpolate), MAP delta and IGN.

Re-enable and see if REP goes away.

Ed M

[griffincox]

Disable as advised above and perform a wide open throttle pull from stop to redline. Log the regular PIDs including MAP, RPM, MAF and Dynamic Airflow (for SD tunes). At the ETC Throttle test (P0068) rpm breakpoints, note the airflow value and add 10%. Put this value in the tune cell. Do this for all axis points. Do the same for the Airflow delta (interpolate), MAP delta and IGN.

Re-enable and see if REP goes away.

Ed M

I have pretty much done that, not quite as specific (probably should make them more accurate, as right now they are overly high limits) but my issues is not with P0068, its with P0121. As far as I can tell the enable/disable temps are the only adjustable parameters for P0101, P0106, and P0121 in this section of the HPtuners interface. Is there tables available (in any OS, for proof of concept) that allow modification to the airflow values for these above diagnostics?