Thread: Interesting issue I cannot seem to figure out....

Originally Posted by Sabrewings

Are your STFTs and LTFTs locking in at 0 every time you go WOT? Make sure to look at it both when you roll into the throttle and when you punch it.

I can check this, what will this determine?

Originally Posted by bluegtp91

False Knock? How are your motor mounts...if they are really bad you might try replacing them. Also check the DP...when I went WOT a couple times scanning I got almost 9* and was like ?!?!? On a 3.4" with a XP Cam setup??!?! Not happening...turned out my DP from my Pacesetters was making contact on the Front Sway Bar...flipped it upside down and it cured it right up

Hope you figure it out man.

Motor mounts are fine. So is downpipe clearance (sway bar flipped). Before all this the car was well tuned and getting 0 degrees of KR. Ever since this issue all of a sudden popped up, its been showing lean and lots of KR.

I really don't think its false judging by the O2s, i'm 99% sure its fuel

Originally Posted by Reptile

With O2's that low, it's got to be pointing toward a fueling issue. The only way to diagnose the pump is to hook a gauge up to the fuel rail and see if it's holding pressure. Make sure that the pump and the FPR is still healthy.

Hey Brian, can you tell me how to do this test? I do have a fuel pressure gauge that hooks up to the schrader.

Originally Posted by Bio248

do you tune out a lot of your torque management? when we were tuning my car we had to keep raising the thresholds on everything because otherwise i would get a bunch of KR. once we finally got everything high enough i was only pulling like 1* or KR when i stabbed it and got a downshift.

The car is or was well tuned before by Overkill. The car has remained the same mod wise. This issue sorta popped up. The TQ managment from what I can see is taken care. The tune has been on it for a couple years, along with the goodies.


I'm damn tempted to swap FPR or pump next.

The wierd part is when my FP went out on my White GTP (around 130,000 miles) it showed no signs of weakness or anything. I drove it to work fine. That evening when I went home to get it wouldn't start. Lucky for me the dealership was down the street with the pump I needed. Oddly enough, my 1993 GP SE fuel pump went out the same damn way!

Thanks for the help guys I need to get this straightened out...