ECM upgrade (1227730) for stock 2.8 (Page 94/107)
Englishrafe FEB 08, 03:33 PM
You're a genius Darth !!
I'd set the base timing at 20° !!!!!

10° set on my strobe since the last time I'd used it and reading another 10° instead of 0° on the scale above the harmonic damper !
What a moron I am ??!!!!

Running fine now.
OH10fiero FEB 12, 01:45 AM
Asking again, can the 7730 ECM be used on a 2002 Northstar?
Darth Fiero FEB 12, 02:23 PM

quote
Originally posted by OH10fiero:

Asking again, can the 7730 ECM be used on a 2002 Northstar?



You will need to talk to Ryan Hess on this. This thread might help you: http://www.fiero.nl/forum/Forum2/HTML/101251.html

If it turns out that you can't use it with the '02 N*, you might be interested to know that HP Tuners says they support tuning of the 2006-09 Cadillac Northstar PCMs including the 2006 Cadillac DHS which was offered with the non-VVT LD8 and L37 -> which I believe your 02 N* might be compatible with. So that might be another option you want to look into.

-ryan
fieromullet FEB 13, 04:40 PM
Ok so I finally finished catching up on this thread and I have some questions.
I am in the middle of swapping a 3.4l from a '94 firebird. I'm going to be changing to distributor and all the fiero accessories. just using the block and heads. Its a learning process and i'm not experienced enough to go to DIS.
I think I understand most of the swap but I'm curious to know if anyone knows if the 93-94 ECM is the 7730? and If it had the digital EGR? I'm not too worried about the egr as I don't have to pass emissions here.

Also, will this swap be compatible with the trueleo intake? I'm thinking of uprading to that next year. (already over budget)

If I decide not to do the ECM swap, this year, would I be better to use the ECM from an 85? I guess I should mention that I have an 87 GT.
Thanks
Gabe
Darth Fiero FEB 14, 01:38 AM

quote
Originally posted by fieromullet:

Ok so I finally finished catching up on this thread and I have some questions.
I am in the middle of swapping a 3.4l from a '94 firebird. I'm going to be changing to distributor and all the fiero accessories. just using the block and heads. Its a learning process and i'm not experienced enough to go to DIS.
I think I understand most of the swap but I'm curious to know if anyone knows if the 93-94 ECM is the 7730? and If it had the digital EGR? I'm not too worried about the egr as I don't have to pass emissions here.

Also, will this swap be compatible with the trueleo intake? I'm thinking of uprading to that next year. (already over budget)

If I decide not to do the ECM swap, this year, would I be better to use the ECM from an 85? I guess I should mention that I have an 87 GT.
Thanks
Gabe



The 1993-95 Camaro/Firebird 3.4 computers are not 1227730's. What they are is an early version of GM's flash-based computers which means they don't have any removable chips that can be reprogrammed. And no tuning software exists that can edit or reflash these computers - so you are stuck with the stock programming if you want to use one.

Because you are going to be using a distributor on this engine, you can use a stock Fiero V6 ECM for now and save yourself some time and money if you want (but you will still need to have the chip reprogrammed to work with this engine).

-ryan

[This message has been edited by Darth Fiero (edited 02-14-2010).]

fieromullet FEB 14, 09:34 AM
Thanks for the info.
Silentassassin185 MAR 02, 06:01 PM

quote
Originally posted by Darth Fiero:
Alex, I used to have a 350 TPI that was running the 7165 ECM and $6E code mask. I then upgraded to the speed density 7730 ECM running $8D code mask and the drivability/response of the engine increased significantly with just the ECM swap alone. It's definately a worthwhile upgrade and there is also a bonus when doing this. VEMaster is a shareware software program that works with TTS Datamaster scan data logs and the $8D code mask to automatically adjust VE table values to help you tune. VEMaster works very well and pretty much can take care of your idle and part throttle fuel table adjustments automatically. Of course, if you have done much reading over at thirdgen you probably already know this.

-ryan



A quick question. I'm in the process of a SBC swap using a TPI setup that uses the 7730 ecm. The stock wiring harness for the car (86 GT 2.8 4spd stick) is junk so I'm going to talk to a local hot rod wiring shop about making a new harness.

Would it make sense to give them the stock harness schematics for the 86GT and have them remake the stock harness just with the re pinned connection for the ECM and two extra injectors? Or would there be a better way to do this?
Darth Fiero MAR 02, 07:00 PM

quote
Originally posted by Silentassassin185:


A quick question. I'm in the process of a SBC swap using a TPI setup that uses the 7730 ecm. The stock wiring harness for the car (86 GT 2.8 4spd stick) is junk so I'm going to talk to a local hot rod wiring shop about making a new harness.

Would it make sense to give them the stock harness schematics for the 86GT and have them remake the stock harness just with the re pinned connection for the ECM and two extra injectors? Or would there be a better way to do this?



It would be much easier to start with a stock Fiero 2.8 harness and modify that to work with the TPI V8. Only two pairs of injector wires will need to be added and some other sensor/device wires in the engine compartment may need to be lengthened or shortened. Aside from that all you would probably need to do is just add wires in the harness for the additional grounds and knock sensor the 7730 TPI ECM wants. But I think it would be cheaper just starting with a FIero harness rather than trying to build a custom one from scratch.

-ryan
Goldenfoot MAY 01, 10:04 PM
Im getting the things I need together for this swap. I got lucky when I bought a used engine that was suppose to be a stock 2.8 but turned out to be a 3.1 with the knock sensor and crank position sensor already in the block. I plan on doing DIS with digital EGR and EVAP purge solenoid. I have my needed parts list. Ive talked with Ryan (Darth Fiero) to get my prom burned and sent a PM to Gwain for the EGR adapter plate (crossing my fingers he still has one). Do any of you that have done/are doing this swap have any pointers for me? Thank you in advance!
randye MAY 09, 09:53 PM
I'm just about ready to do this swap myself and it's LONG overdue.
When I rebuilt the 3.4 motor I swapped into my car, I deleted the cold start injector system, thinking "Hey, I live in FLORIDA, what the heck do I need a *cold* start injector for anyway."
Turns out they didn't mean "cold" like I thought. It's apparently when the coolant temp is below operating temp....
After having hard stating issues for so long, (having to crank the engine over 3-4 times to get it to start), I'm looking forward to the 7730 fuel enrichment at start up and hopefully curing some of the rich running I've had in open loop with this 3.4 until the car warms up, (after it finally starts...)
I'm staying with the OEM cruise control, as I've already replaced all my IP and Aux gages with SpeedHut gages and tapped the 4000PPM signal off the OEM buffer circuit board, leaving the 2000PPM signal to the OEM cruise module intact.

"Mulletproofmonk" is building me a nice "adapter harness" and Ryan is reprogramming the memcal.
I'm hoping I'll have everything here and installed in a week or two.

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