mrogers

iTrader: (1)

I have a '89 4.3L in my Camaro and have been driving it with the stock PCM from the S10 Blazer I pulled with the motor from for five years. It works alright, but I know it needs some tweaking, and definitely will after I do the vortec head swap.

Anyhow, I bought a working (I plugged it into my wiring harness and powered it up without starting and had a steady CEL) 7747 from a V8 truck and have installed the Moates G2 adaptor and just can't get it to work properly. I burned a AKDX2088 cal onto a chip with the proper offset and confirmed it was programmed correctly. I installed it into the car and I get the PROM failure flashing CEL. The motor will start and drive suprisingly well on the limp mode. I tried a couple more times to set the chip into the ZIF and couldn't get it to stop flashing until I started the car and then fiddled with the handle and suddenly the CEL went out and clearly started running different.

So, I know the cal loaded onto the chip and the chip and adaptor are working, sometimes anyway. The cal wasn't very good. I tried to restart the car and I got the flashing CEL again and after starting it I was able to fiddle with the ZIF and get it to work, but again the cal wasn't good at all so I put the ABUL cal on the chip and tried that, but I never could get the PCM to stop flashing the CEL, so I don't know if this other cal is any better yet.

I rechecked all the terminals and pins on the adaptor and none were shorted when I soldered it on. All seems right, which makes sense since it did run on the PROM for a while.

I found a thread here (below), which was very inconclusive about whether the NETRES or CALPAK or whatever it may be called needs to be from the same type of engine(4, V6, V8). I confirmed that I have a V8 NETRES by the part number in the thread and have a suspicion that it may be part of the problem.

https://www.thirdgen.org/forums/diy-...tres-part.html


I can't get started tuning until I have this issue straightened out, so any help is appreciated. I would be willing to trade my V8 NETRES for someones V6, as I understand these V8 units are more desirable.

Thanks in advance.

Tuned Performance

iTrader: (92)

The calpak for the 747 ecm would be numbered 16051637 for 4.3 and 5.0 and 5.7L gm acdelco part number 16051636.

Tuned Performance

iTrader: (92)

You might want too ditch the zif there problematic.

utilityguy2

iTrader: (1)

Without getting too deep into it, the V8 Netres chip you have is still for a TBI and that may be why it works well in limp home mode for you. I think most if not all of your problem is with the adapter like TunedP said.

mrogers

iTrader: (1)

Thanks for the suggestions.

I wasn't aware that the calpak was common between all of the TBI engines. I'm curious to check which PN is in the stock PCM that I use now.

I will have to try it without the ZIF I guess. I am using the higher quality ZIF from Moates though for what that is worth.

Thanks again.

utilityguy2

iTrader: (1)

I wouldn't go so far as to say the resistor pack is common for all TBI as they are all different for the individual engines/vehicles but they have similarities that allow it to run somewhat decent.

Tuned Performance

iTrader: (92)

are you refering to the 747

http://parts-catalog.acdelco.com/cat...701&parttype=0

Tuned Performance

iTrader: (92)

Really sounds like you have a prom issue or zif connection problem. If your needing a 16051637 let me know I have a few but sounds like it went into lhm and its the correct calpak.

Tuned Performance

iTrader: (92)

How would you install a memcal into this ecm

utilityguy2

iTrader: (1)

you wouldn't, that's why I edited it when I noticed it was a 747. Sorry for the confusion.

And I know it's a calpac not netres. Boy did I screw that one up! Pays to read the complete thread.

Tuned Performance

iTrader: (92)

opps, LOL I haven't touched a c3 747 ecm in over a decade. Thought I was getting a little rusty