insylem

Hello
We continue our adventure into the P0172 code. The GM boys at the local dealership here are no longer invited to join in the festivites due to their incompentance. In addition to finding excuses and illogical conclusions, they have caused damage to my car.

Now, last time, I got a stock program in my ECU. Ok some one expressed
concern about having a 2.85" supercharger pully and a stock program, and
that I may or may not have the proper fuel injectors.
Well,
I drove to another town to get a Backup switch ordered. (Seperate issue)
and the guy at the parts desk said Im suposed to have AC Delco #217-1611 Fuel injector.
I checked my car and I have 01D0308. I googled it, but didnt get much info, I did however get hits on 01D030B. Seeing as how 8 and B can look similar, espessly to some one with a reading disorder I went with the 01D030B.

The information i found is as follows:

Delphi / Lucas
42 lb / hr. '009' Disc Injectors
Part Number Delphi 01D030B (Lucas old 5208009, Lucas New 621031)
Static Flow Rate: 42.29 lb/hr @ 43.5PSI (300kPa) or 320gm/min
Dynamic Flow Rate: 9.96 gm/pulse - 2.5ms pulse width and 10ms repetition rate
Coil Resistance: 15.9 Ohms / High Impedance / High-Z (No ECM driver modifications required)
Additional Information:

Top feed disc injectors use a small disc with six holes around its circumference. The disc rests on a short chimney that surrounds a metering hole. As the disc is raised off the chimney by magnetic force, fuel flows through the holes in the disc, over the walls of the chimney, and out the metering hole to form a full, finely atomized cone.

Performance advantages over pintle injectors (i.e. Ford / Bosch & Accel types) as listed by Delphi:
• The flat mating surface ensures that no excess fuel is present to evaporate and therefore, no deposits or clogging can occur.
• Compatible with alternative fuels (i.e. Methanol)
• Longer service life
• High-speed disc action allows wider dynamic flow range for improved idling
• Quieter operation
• Revolutionary disc design resists build up deposits which can affect fuel flow.
• No Fuel leakage for quicker starts

Im guessing that this is NOT the stock fuel injectors.

So what do I do? Ive checked and fixed many vacume leacks.
Could these injectors cause me to run rich? Should I swap them
back to stock? What about my supercharger pully?
What is the stock size on that? I tried to get one at the parts
desk, but they said it doesnt come seperatly only with the supercharger.
My pully is ZZ Performance.
thanks,
-Jonathan

roser4888

Those injectors will cause you to throw a rich code, especially if you dont have the ecm upgrade. The computer is not calibrated for that much fuel and its seeing too much fuel. DONT SWITCH THEM TO STOCK YOU WILL BE RUNNING LEAN WITH ONLY 34LB INJECTORS.

c0ld29

You wouldn't be able to run a 2.85 safely at all with the stock injectors... (I'm assuming you mean stock as in not staged, brand new off the factory line stock)

You would need the stage 2 injectors at least which are.... 42lb injectors

I'm guessing the car was stage 2 before you got it, or you had stage 2 before, OR you got an aftermarket stage kit that came with 42lb injectors smaller pulley and a tune.

Injectors should be fine.

Do you have an aftermarket intake? Using an oiled filter? Clean your MAF sensor, could be the issue.

*edit after rereading your post again I see you have stock ECU tune, keep everything you have on and get the GM dealership to flash your ECM to the stage 2 tune and you should be good (actually better than before)

roser4888

Deff true

but when you buy the stage 2 it comes with a 1 time use code he would have to buy the stage 2 kit again.

ShortStack

The problem is that you are using bigger injectors on a stock tune.

That is not the stock injector. STock injectors are 35# iirc.

Rocket

Ummm it was my understanding that the 2.8 pulley required 60lb injectors. the 2.9 was the cut off. I've got the 2.8 with 60lbs in my car and it runs fine. The 42lbs are the stage 2 injectors.

oh and you need a tune

ShortStack

Wrong. Common Misconception.

I ran 42s on my 2.8 just fine.

Rocket

Might be because mines a 2.2.

insylem

2.2? Damn!
I might have to do that if I want to make it up Pike's Peak someday.
Ill need to really get that supercharger going to compensate for high altitude. But thats for another day.

Ok:
If I want to do a complete Stage II Mode to my car.
What are all the mods for it?
Will GM Flash me to stage 2 without bitching about warranties?

Rocket

No no 2.2L not 2.2 pulley

insylem

Ok So I need to get tuned.
My injectors are letting in too much fuel.
This explains my P0172 and it explains
why my car thinks it gets better gas milage
then what it really does.

So,
How do I get this car tuned properly? I dont have the equipment,
nor the knowlage to do it myself.
Thanks,
-Jonathan

insylem

Arise! Arise! I command thee oh dead thread Arise!