Full line pressure with A4 SD tune

[GMPX]

Maximum pressure due to MALF (TSTATE08-MAXPRES) was at “NO” during all tests.

John

Thanks John, I won't bother chasing it down that way then.

Cheers,
Ross

[jnorris]

30/35 psi is not max line pressure, but is somewhat high for idle (expected is 5-10 psi).

It seems as if the PCM is modifying line pressure based on airflow... BUT there appears to be no table for this.

It is max pressure for the amount of engine torque that was being measured by the PCM at idle.

John

[joecar]

It is max pressure for the amount of engine torque that was being measured by the PCM at idle.

John

I'm sorry I don't follow, please explain further...

Joe

[jnorris]

The transmission line pressures are set by the values in {D0701} and the other tables under the “Trans Pressures”

John

[Black02SS]

Don't know if it helps any. Did two A4's today, one a 00 and the other a 01. I didn't have a problem with either of them.

[dissonance]

Don't know if it helps any. Did two A4's today, one a 00 and the other a 01. I didn't have a problem with either of them.

from what my own car "98" and what others have reported this is only a 98 related problem. i gave up on the SD tune for now because the last thing i need is for my trans to have problems "again"

[Black02SS]

from what my own car "98" and what others have reported this is only a 98 related problem. i gave up on the SD tune for now because the last thing i need is for my trans to have problems "again"

I have personally seen this on a 99 and 00 as well.

[dissonance]

i see what you mean, maybe this is a diffrent problem but alot of guys on tech have found ways to fix it but all the fix's are for 98 cars. it was sometime ago but i was not able to match up all the changes that needed to be made with flashscan. most fix's are step by step hptuners. maybe someone alittle smater then me could put two and two togeather.

it's a maf code related fail safe mode? only with the maf unplugged right not just the fail feq turned down?

i will see if can find some of the info i was working with before.

[Black02SS]

it was sometime ago but i was not able to match up all the changes that needed to be made with flashscan. most fix's are step by step hptuners. maybe someone alittle smater then me could put two and two togeather.

also is this only with the maf unplugged right? it's a maf code related fail safe mode?

Back when I was a HPT customer the only way I knew to fix the problem, was to send the bin in and have them "fix" it.

[jnorris]

For what it is worth went to {C6001} Engine DTC Processing Enablers and I changed P0101, P0102, and P0103 to "X:Not Reported" from “B: 2 Trips, Emissions Related” and the car would not run. It would crank but not start.