another possible fueling issue.... :(

ok, so today i decided to keep an eye on my ltft's because i was getting random spurts of KR everywhere. So, as i was watching them, i notice while coasting i was reading -22.1 ( normally i am around -16.4 ). Then I gave it a good amount of gas and i was only down to -13.2(normally closer to -5). So, i went WOT and i was only at -2.3(normally between +2 and 0 ). Than i decided to just drive normal and out of nowhere the ltfts spiked up to +13.2 and dropped immediately back down to -13.2 to -16.4.

Is my fuel pump going bad or am i just imagining things? Because I have a brand new NA quick change fuel pump sitting in my basement, just never installed it.

I think your tuner sucks.

zzp dyno tuned. it just started happening though...

Those trims should lock in at 0.

What's your AFR?

idk...all i have is a scan gauge. I dont know if i can find out what my afr is.

This is one of the reasons I hesitate to top swap my car...all these tuning issues I keep reading about. Call me lazy but I want to be able to set the car up and actually enjoy driving it (like I do now) all this constant fiddling reminds me of old aggrevating Holley carbs.

well it was fine, and i do enjoy driving it. It would be soo mch easier if i knew how to tune, but i dont and i dont have time to learn how to tune either....just have to suffer with it i guess....

so, no one can help me with this?

If ZZP tuned it then I would contact them first

Vac leak. Bad gas. Weather. multiple issues can be at play. Retune even.

could there be a possibility of a fuel pump going bad?

I dont know of anyone around here to retune my car. Im not driving all the way to michigan again to have them retune the car...

Good info in this thread Timmmy:

http://www.grandprix.net/ubb/ultimatebb.php?ubb=get_topic;f=1;t=012517#000001

Fuel pressure should be 48-55 psi at the fuel rail, with the key on and the pump running.

ill have to check out one of my local mechanics to see whats up. if the fuel pressure is good, i would than need for someone to help me retune the car....

Check for vac leaks?

well i went around to the local shops and they all wanted between $15-$25 to have the fuel pressure tested. I asked one of the shops why they are charging $25 to do a simple fuel pressure test. The guy said, "well we normally charge $80 for a diagnostic and plus my guys time to do the test.". I said "ya, well it only takes you 5 minutes IF that to simply hook the gauge up to the fuel rail and your going to charge me $25 for that, no thank you." He goes, "well we could work on the price, probably go down to $10-$15 depending on the difficulty." I laughed and walked out.

You can rent a fuel pressure tester from Autozone.