my plan is to run the 90-92 tpi ( 8d I belive off the top of my head right now) with the 7749 ecm. I will only run 4 P&H port injectors (so no need for a extra driver or sense resistor) and it will be wired with the jumper wires to the P&H pins.

now my question---- is this all that has to be done or is there something in the code which needs to be changed?


and for the future I thought there was a made up boost of this code rather than using the ty/sy 58 code for future plans I have.

 

From testing on my bench all you would need to do is substitute the '7749 for the '7730, but didn't look specifically at running the injectors in P&H mode. I should test that, been something I have been curious about anyway.

If you want to run boost, $59 would be your best option. It started as $58, but has had many improvements made to it. www.code59.org

 

I know the 730/749 are swappable as I belive one more pcm I have is as well (pin outs are the same but the pcm info is not out there).

I just need to know if the P&H is only done by the jumper wires or something in the code. I should have a copy of the 59 mask since I ran that several years ago on my old formula. I just want the 8d code due to some tables it has that the ty/sy and sunbird/GA don't have.

 

P&H is a hardware function not a code function.

What tables are you looking for?

 

Your first post is a little confusing. To run the 4 PnH port injectors you need the extra injector driver setup that the '7749 has. A '7730 ECM won't work.

Wire the injectors the same way GM wired them for the Turbo Sunbird or Turbo Grand Am. This will be 2 injectors in parallel on each driver. Note that this is different then the way the Sy/Ty injectors are wired, so don't go by that setup.

The '7749 is short a quad driver over the '7730 ECM. The $8D code uses that driver for the TCC. Whether this is an issue depends upon whether a TCC is desired.

Then use a Turbo Sunbird/Grand Am MEMCAL.

RBob.

 

Just a couple things that come to mind.

The sense resistors will need to be changed to .050 ohm resistors to run 8 low-Z injectors in P&H.

The MEMCAL should be a V8 MEMCAL, so that the cylinder count matches up.
I had some minor rough running issues initially with my car, and changed a couple things including the MEMCAL from a 4 cyl to a 6 cyl MEMCAL. I'll have to reinstall the 4 cyl MEMCAL to know for sure if that has an effect or not. The other change I made at the same time was locking out the dizzy.

I did forget about the lacking quad driver being used for the TCC though. That could be an issue.

 

I think you guys are missing what I wrote but that's fine I guess the main thing is I wanted to make sure Is that the driver was not a software issue on top of the rewiring. thanks

 

The injector driver(s) being saturated vs. PnH is just how the injector wiring is set up.

RBob.

 

Nope, wasn't missed. Like I said, the sense resistors will need to be changed when running 8 low-Z injectors from a '7749. The value that the '7749 is for 4 low-z injectors (2 injectors per driver).

 

"my plan is to run the 90-92 tpi ( 8d I belive off the top of my head right now) with the 7749 ecm. I will only run 4 P&H port injectors (so no need for a extra driver or sense resistor) and it will be wired with the jumper wires to the P&H pins. "


yes it was missed but thanks

 

How are you going to run a V8 with only 4 injectors?

The way I read it was that you were saying 4 injectors per driver, hence the desire to use the '7749, over the '7730.

Maybe you need to explain a little more of what it is that you are trying to accomplish, so that we can better understand and advise you.