Known LNF 2.0T issues that need to be addressed please post here!

[Bill@HPTuners]

As requested here http://www.hptuners.com/forum/showpo...2&postcount=83 please post your experience as to what issues are most important to you guys here.

Make sure you attach any pertinent .hpt and .hpl files

I'll start off with one I've heard alot about

1. Scanner PID for the stock wideband O2 sensor & fuel pressure PID(if its even possible)

thanks,
Bill

[Bill@HPTuners]

2. here is one of the scans turbofreak posted http://www.hptuners.com/forum/attach...0&d=1202617062 regarding the boost limiter issue many are facing at around 18 psi of boost or 6300 rpms

3. correct me if I'm wrong but it appears that there may not be a MAF voltage PID which would probably be good to have in tuning the LNF maf table.

4. cat over temp control

5. boost control via pcm

6. the ability to swap to a 3 or higher bar map sensor as many are already on the edge of the 2.5 bar map.

[shabby]

1) rpm control, still stuck at 6300rpm
2) boost control
3) eliminate 23psi boost ceiling? ability to stretch the tables to accept a 3 bar sensor maybe?
4) wideband/direct injection fuel pressure pid
5) cat over temp control
6) cooling fan control
7) 50+ ve tables other cars have

nice things to have but not necessary
1) no lift to shift and launch control from cobalt ss

[Bill@HPTuners]

1) rpm control, still stuck at 6300rpm
2) boost control
3) eliminate 23psi boost ceiling? ability to stretch the tables to accept a 3 bar sensor maybe?
4) wideband/direct injection fuel pressure pid
5) cat over temp control
6) cooling fan control
7) 50+ ve tables other cars have

nice things to have but not necessary
1) no lift to shift and launch control from cobalt ss

Can you post your latest .hpt file & scanner log showing the 6300 rpm limit?

[405HP_Z06]

Torque management tables.
Automatic HHR SS is boost limited in 1st and 2nd gears. Surely there's a table for this.
Auto trans tables

[justmike]

1. Scanner PID for the stock wideband O2 sensor

This would be a great start ... had it on the DashHawk for over a year.

[Baldturbofreak.com]

Cam timing PID,
torque managment strategy concerning cam timing?
ETC tables

[Chris@HPTuners]

quick question, the code seems to have provision for two MAP sensors and a Baro sensor. How many MAP sensors are there actually fitted? Is there one in the manifold and one on the turbo side of the throtttle body as well? and then an ambient (barometric) pressure sensor on the turbo inlet side or some other place?

Also looks like both the pressure side sensors are 2.5bar stock and the baro sensor is a regular 1bar sensor.

[shabby]

Maybe this will help, theres an additional tmap sensor fitted on the intercooler pipe.



Bill im far away from my laptop, im sure baldturbofreak can provide you the hpt/logs you're looking for. You can even see in the log you posted before he's maxing out at 6300rpm.
Btw in what situations is the ecm controlling the bov? Simply in regular driving or to bleed of excess boost?

[Baldturbofreak.com]

Here is some logs, im not sure which have me bouncing into the redline.
but the 23psi one I beleive shows the ETC doing it's magic.

[Baldturbofreak.com]

The Baro sensor is on the board of the pcm? Like a honda?
I hope the code could be modified for a different T-map & Map someday.

[405HP_Z06]

quick question, the code seems to have provision for two MAP sensors and a Baro sensor. How many MAP sensors are there actually fitted? Is there one in the manifold and one on the turbo side of the throtttle body as well? and then an ambient (barometric) pressure sensor on the turbo inlet side or some other place?

Also looks like both the pressure side sensors are 2.5bar stock and the baro sensor is a regular 1bar sensor.

That would make sense according to the diagram shabby posted.
BARO sensor is built in to the PCM (Ambient pressure sensor)
One before the throttle body
One after the throttle body

[Baldturbofreak.com]

here's what Ive been runnin'

[RedVHO]

1. Scanner PID for the stock wideband O2 sensor & fuel pressure PID(if its even possible)

They are both possible. I currently can monitor both with my Aeroforce Intercepter gauge, so the PIDs are there.

[Bill@HPTuners]

Yeah, I had heard about the wideband PID, not the fuel pressure.

[divingsolo]

IAT2...post i/c map/temp

[Chris@HPTuners]

Maybe this will help, theres an additional tmap sensor fitted on the intercooler pipe.



Bill im far away from my laptop, im sure baldturbofreak can provide you the hpt/logs you're looking for. You can even see in the log you posted before he's maxing out at 6300rpm.
Btw in what situations is the ecm controlling the bov? Simply in regular driving or to bleed of excess boost?

Thanks for the pic and the file, helps a lot. Usually the BOV would only be used to bleed off boost when the throttle is closed rapidly or in some cases if some conditions for surge transient are met (to protect the turbo). Normally the BOV is either open or closed so it's not generally capable of actually controlling boost, the wastgate control does that.

[justmike]

This may help ....

[Baldturbofreak.com]

I'm going to take it to 7500rpm tomorrow and make it beg for mercy. I will post the log. (I had some digital help from a friend)

[shabby]

Bill/Chris any clue why baldturbofreak was still limited to 6300rpm even after the changes that he made to the rpm limits?