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

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Iron Indian Interesting issue I cannot... 04-10-2009, 02:44 AM
Sabrewings Re: Interesting issue I... 04-10-2009, 02:53 AM
Iron Indian Re: Interesting issue I... 04-10-2009, 12:09 PM
Sabrewings Re: Interesting issue I... 04-10-2009, 04:18 PM
blueguy Re: Interesting issue I... 04-10-2009, 04:26 PM
blueguy Re: Interesting issue I... 04-10-2009, 03:23 AM
Reptile Re: Interesting issue I... 04-10-2009, 06:53 AM
Bio248 Re: Interesting issue I... 04-10-2009, 09:32 AM
Iron Indian Re: Interesting issue I... 04-10-2009, 12:26 PM
Reptile Re: Interesting issue I... 04-10-2009, 01:58 PM
Iron Indian Re: Interesting issue I... 04-11-2009, 01:37 PM
agrazela Re: Interesting issue I... 04-11-2009, 04:04 PM
Iron Indian Re: Interesting issue I... 04-11-2009, 07:21 PM
Sabrewings Re: Interesting issue I... 04-10-2009, 04:55 PM
Iron Indian Re: Interesting issue I... 04-12-2009, 07:20 PM
Reptile Re: Interesting issue I... 04-12-2009, 10:55 PM
Iron Indian Re: Interesting issue I... 04-12-2009, 11:18 PM
98GTPCALGARY Re: Interesting issue I... 04-12-2009, 11:21 PM
Iron Indian Re: Interesting issue I... 04-12-2009, 11:25 PM
98GTPCALGARY Re: Interesting issue I... 04-14-2009, 08:09 PM
Iron Indian Re: Interesting issue I... 04-14-2009, 10:51 PM
Iron Indian Re: Interesting issue I... 04-13-2009, 01:18 AM
blueguy Re: Interesting issue I... 04-13-2009, 04:17 AM
Iron Indian Re: Interesting issue I... 04-13-2009, 08:56 PM
agrazela Re: Interesting issue I... 04-13-2009, 10:22 PM
Iron Indian Re: Interesting issue I... 04-14-2009, 10:44 PM
98GTPCALGARY Re: Interesting issue I... 04-15-2009, 08:25 PM
Reptile Re: Interesting issue I... 04-16-2009, 09:59 PM
Iron Indian Re: Interesting issue I... 04-16-2009, 10:09 PM
FoSHO99 Re: Interesting issue I... 04-16-2009, 10:23 PM
Iron Indian Re: Interesting issue I... 05-03-2009, 08:14 PM
Iron Indian Re: Interesting issue I... 05-03-2009, 08:21 PM
Sabrewings Re: Interesting issue I... 05-03-2009, 08:23 PM
agrazela Re: Interesting issue I... 05-04-2009, 10:49 AM
Iron Indian Re: Interesting issue I... 05-04-2009, 08:44 PM
Iron Indian Re: Interesting issue I... 06-20-2009, 06:55 PM
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  1. #1 Re: Interesting issue I cannot seem to figure out.... 
    GXP Level Member Iron Indian's Avatar
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    Quote Originally Posted by Sabrewings View Post
    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?


    Quote Originally Posted by bluegtp91 View Post
    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


    Quote Originally Posted by Reptile View Post
    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.


    Quote Originally Posted by Bio248 View Post
    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...
    Last edited by Iron Indian; 04-10-2009 at 12:16 PM.
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  2. #2 Re: Interesting issue I cannot seem to figure out.... 
    GrandPrix Junkie Sabrewings's Avatar
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    Quote Originally Posted by Iron Indian View Post
    I can check this, what will this determine?
    If a car was tuned in the winter and the trims are much more negative in the summer, at WOT the LTFT could lock in at a negative number which will cause lower O2s. That's why it's important to have your whole tune spot on so your LTFT locks at 0 when you go WOT and your O2s stay where they should be.
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  3. #3 Re: Interesting issue I cannot seem to figure out.... 
    The Blue One blueguy's Avatar
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    Quote Originally Posted by Iron Indian View Post
    The weird 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...
    That is how my fuel pump went in my old Buick. Drove around all day and when I went to start it...nothing. Just one of things I guess...

    Quote Originally Posted by Sabrewings View Post
    If a car was tuned in the winter and the trims are much more negative in the summer, at WOT the LTFT could lock in at a negative number which will cause lower O2s. That's why it's important to have your whole tune spot on so your LTFT locks at 0 when you go WOT and your O2s stay where they should be.
    Well, it is a Overkill PCM...isn't there something for a generic temp. setting or a factory temp. setting in the PCM? Just wondering as I don't know tuner systems very well...
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