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View Full Version : GTRS problems still please help me out!



gotaudi
02-20-2008, 09:42 PM
ok I have had these problems since installing the turbo about a year ago.

The problems are I pull an extreme amount of timing. I am pulling about 8 degrees at 15 psi.
Also the fuel trims still say +22.5% at part throttle. Today i reset the fuel trims and didnt go into boost for a few miles. The fuel trims went back up to the +22.5% out of boost shifting at about 3000rpms for about 20 miles. the value doesnt change when in boost.

I changed the MAF sensor again and no change. I switched my FMIC about a month ago and it didnt help with the timing problems like I anticipated.

can any one of you shed some light on me?

Here are 3 logs I did today all are in 3rd gear at 1.07kg/cm^3 or about 15psi (This is running straight from the wastegate)

http://spreadsheets.google.com/pub?key=pACz_gUkvlVVsTJkTIFWEUQ

dualaudi
02-21-2008, 07:50 AM
We don't have permission to view the google spreadsheet.. (anyway to make it public?) Have you asked unitronics why it's being pulled?

Solaris
02-21-2008, 07:59 AM
It's correcting a lean condition. Pretty bad one, at that. What injectors and fuel pressure are you running? What's the file written for?

gotaudi
02-21-2008, 10:47 AM
Ok I fixed th log you can view it. Unitronics doesnt know why it is pulling so much timing, or why there is such a large fuel trim issue.

The injectors I am using are the greengiants (not the green tops they sucked!) they are rated 440cc @ 3 bar. I am running them at 4 bar so they are running about 510cc. This is what the file is written for.

Solaris
02-21-2008, 11:17 AM
Which MAF housing are you using?

gotaudi
02-21-2008, 11:21 AM
Which MAF housing are you using?

I use the VR6 housing with a stock sensor. I have changed the MAF now twice thinking it is that but the problem still persists.

Solaris
02-21-2008, 11:28 AM
Perhaps bad front O2 sensor? How old is it?

gotaudi
02-21-2008, 11:35 AM
Perhaps bad front O2 sensor? How old is it?

it is the origanal O2 sensor, it has about 60,000 miles on it. The thing is if I unplug the MAF sensor the lean condition is reduced by a lot. but the timing pull is still present.