Northstar Engines and System Technical Discussion Discussion, PCM info for NorthStar in Cadillac Engine Discussion; I am trying to do some digging on the NorthStar PCM, wondering if you N* owners can help.
1. Who ...
I am trying to do some digging on the NorthStar PCM, wondering if you N* owners can help.
1. Who is the PCM supplier? I know it isn't Motorola, I suspect Delphi, as they are main GM supplier.
2. What bus protocols for the 96-99 and the 2000-up? CAN, Class II (SAE J1850), ?
3. Does anyone have any pictures of the inside with some IC's that can be identified?
Thanks! I won't ask if I had a NorthStar car handy, but I don't.... Yet....
check with the guys at auto tap and see what they have
Website claims to have a programmer for all GM OBD2 v-8s.
Also some time back I inquired at SuperChips,whose right up the road from me,and they said they could custom program my 96 Aurora.
I like the HP tuners that you can DIY.
I lost some of the interest when I switched from a Northstar to an LT1. The thing I think it might be, is not too many people know how to crack car computers. So they can offer little advice, and are tring not to clutter up a thread. As for getting a computer, I'd hit a junkyard, and save some $$.
Well is it delphi? And whats the part number?
I dont think it delphi since I could only find part that are for delphi:
Alternator Camshaft Sensor SS10003
Coolant Temperature Sensor
Electric Fuel Pump FE0073 Stamped EPT Or EPW On Sender
Fuel Injector FJ10054
Fuel Strainer FS0030
Heater Core HC0172
IDLE AIR CONTROL VALVE CV10049
Knock Sensor AS10007
MAP Sensor PS10058
Modular Fuel Pump FG0010 Stamped EPV On Sender
Oxygen Sensor ES10049 2 Required
Radiator RA1208 -
Throttle Position Sensor SS10429
I am determined to figure out at least WHY no one has been able to do it. And my goal is to succeed.
Because it's work. Unpaid charity work at that.
On top of that, you have to have a solid foundation in assembly, and electronics (to decode the ALDL stream, translate that into memory locations, and go backwards)... Having a schematic obviously would be a big help (there are none).
To be frank, it's a big PITA with little to gain. Say you did crack it, what do you gain? Maybe a few extra horses when you can modify the spark tables a bit? Change the rev limiter? MPH cutoff? What's the ultimate goal?
After seeing the amount of parameters in the LS1 code, what you can do is amazing. I guess for me, I like to mess around. And cars like Mark's, it might be a Godsend too. You can likely make the PCM use a 2 bar MAP, where now it is only a 1 bar. So the PCM can manage all the boost calculations (timing/fuel) etc.
Like I mentioned previously in another thread, I am close to releasing a plug and play tuneable GM computer for the northstar. Boost will be a possibility. Custom tuning for cams, etc will be done with ease. It won't have all the features the stock OBDII computer will have, as it is OBDI, and it certainly won't talk to any of the other computers, but it will be a major step forward in tuneable, affordable northstar computers.
That being said, I doubt anyone here would be interested in such a thing, it's mainly aimed at people with northstars in other cars (dune buggies, fieros, hotrods, etc).. i.e. people who don't care about all those other computer systems. But plug and play for about $500, with wiring harness is tough to beat. On top of that it's a GM computer with more features than anything Holley, etc can give.
With respect to the OBDII northstar computer hacking, turning it into a computer capable of boost would be quite a feat. You would have to reprogram actual code segments. Hacking the computer is one thing, a very labor intensive (brain melting) thing, but actually rewriting code would be...well... painful. I'm not trying to stop anyone from attempting by any means, but I just see people asking "why isn't it hacked yet?" as if it's some walk in the park... It's not.
^^ That's a sample of what I'm working with right now. If you can't read that in "english" terms, you have a lot of catching up to do. I have a very limited assembly knowledge. It's barely enough to get what I'm trying to do done. Hacking an ECM is beyond my reach...