Well as many of you know i have the st185 swap and ever since the accident, sphinx and i have noticed that my car isnt running up to par... I honestly think that his is faster than mine, i know it depends on the driver also, but i mean on top of him being a better driver i still feel his car is running better. I have driven IN his car and actually driven it so i can tell. We have about the same mods yet his is faster. Well one of the things that we noticed was that my injectors are working pretty hard/high. When the car is idling or warming up, my AVC-R reads that they are working at 93% or so, but when i start driving it goes down to about 81%. Yet when i drive sphinx's car or even when Im in it it idles at about 84% then when its being driven it only goes down to about 81% (sphinx can verify the #'s).
Well sphinx has been wondering what could be the cause of this problem but he cant seem to put 2 and 2 together. So i am seeking the help from you guys here on the boards to solve this problem I am having.

Thanx in advance,

Almost boosting,
David

This is strange... The injector duty % should run up and down incorresopnding with the throtle.

My injectors duty is only 1% to 2% at idle...

Is the "93%" the displayed peak value that the injectors had been used instead of the "real time" operating % ???

I agree with Lar-. Your duty cycles seem very high for idle, and they should increase with load.

Mine don't decrease, they increase.

When idle, my AVC-R reads 83%, then when i'm mashing on it, it increases, but not dramaticly.

-sphinx+Jun 4, 2004 - 8:35 AM

The "Jerk back and forth" should be "lack of fuel". The 2 culprits that I can think of are;
1. Dirty Fuel Filter(uneven fuel flow during high rpm or boosting).
2. Your Fuel Pump is weak. Are you still using the stock fuel pump??

-Lar-+Jun 5, 2004 - 8:50 AM

I did change his Fuel filter. That thing was clogged up nasty. As for the fuel pump, his swap was done at a shop in Sacramento. I'm not exactly sure if they "actually" changed his fuel pup to the Walbro 255 lph. I know not to trust shops, cause they can easily say that they changed something , when in reality, they didn't.

One important leasson for anyone, if you have the means to do things on your own, JUST DO IT.

wait guys, will the stock pump run the engine... still having problems with my swap. If someone told me it was my tire pressure I would go check it out >>

The stock fuel pump will even blow on a 5sfte

-Chrobis+Jun 8, 2004 - 12:28 PM