ECM upgrade (1227730) for stock 2.8 (Page 46/107)
Darth Fiero JAN 13, 09:07 PM

quote
Originally posted by Pyrthian:

well, my next stumblingblock: the crank sensor
since I am also adding the DIS, I need to wire this in also. I went to the local "u-pull-it" yard, and cut off the connectors for the DIS module. took em home, and compared them to my schematic (89 baretta) and noticed the 3-pin crank position sensor was wired different than the schematic shows. in the schematic, it shows 2 wires, and I guess a shielding sleeve wired to the center post - using all 3 connectors. on the one I brought home - there are only 2, one of them being the center post. so, I wnet thru the PDF's Darth had posted, and noticed on the 93 Firebird - it 2 wires, one of them being the center post. and, checking more into this - looks like they used a twisted pair instead of sheilding. and - the thing that makes me worry is: the way its labelled in the PDF. the post are "A C B" not "A B C" like all the others. is this a typo on one of them?

so, the Q: can I use the twisted pair connector as is? are there different crank sensors & different DIS modules?
I expect not, they are the same, just 2 different approaches for noise suppression. on the connection between them



Just use the twisted pair of wires as-is. Most of the time this is what I find on 3.1 DIS systems; no shield wire.

-ryan
Pyrthian JAN 16, 12:24 PM

quote
Originally posted by Darth Fiero:
just use the twisted pair of wires as-is. Most of the time this is what I find on 3.1 DIS systems; no shield wire.

-ryan



thanks - thought that was the way to go.

anyways - while wiring up the rest of the DIS system - I was totally amazed that ALL of the existing Fiero distributer wiring transfers, wire color & all to the DIS module, and, for the power, the remaining EGR wires (A & D) work perfectly. the only thing that needs to be added is the twisted pair from the crank sensor to the DIS module. I thought this was gonna be a maze of wires. removing my A/C is more complicated than switching to the DIS.

and, yes, I am just going blindly step by step with no "pre made" plan.... a rough idea - but no plan.....
Darth Fiero JAN 16, 02:40 PM

quote
Originally posted by Pyrthian:


thanks - thought that was the way to go.

anyways - while wiring up the rest of the DIS system - I was totally amazed that ALL of the existing Fiero distributer wiring transfers, wire color & all to the DIS module, and, for the power, the remaining EGR wires (A & D) work perfectly. the only thing that needs to be added is the twisted pair from the crank sensor to the DIS module. I thought this was gonna be a maze of wires. removing my A/C is more complicated than switching to the DIS.

and, yes, I am just going blindly step by step with no "pre made" plan.... a rough idea - but no plan.....



GM has been kind to us in keeping with the same color wires that serve the same function across car/truck and engine lines. Sure beats some imports I remember installing remote starts into that had sometimes as much as 8 wires under the dash that were all the same color but all had different functions!
PaulJK JAN 20, 05:38 PM
Darth, sorry if these questions have already been asked but:

1. Does this upgrade still allow the "Check Engine" light to function like stock ?

2. Do you require a "core" ECU for this upgrade ?

Thanks
Darth Fiero JAN 21, 03:12 PM

quote
Originally posted by PaulJK:

Darth, sorry if these questions have already been asked but:

1. Does this upgrade still allow the "Check Engine" light to function like stock ?

2. Do you require a "core" ECU for this upgrade ?

Thanks



1) YES

2) I'm not sure what you're asking. A core implies that you are buying a 7730 ECM upgrade "kit" from someone; which none are being sold by me or anyone else that I am aware of. If you are going to do this upgrade or have it done by someone else, then you will either need to supply the 7730 ECM or pay for the purchase of one. Then you will need the mem-cal out of this ECM reprogrammed for the application. If your 7730 ECM doesn't come with a compatible V6 mem-cal, you will have to buy one seperately.
PaulJK JAN 21, 04:34 PM
OK - I was unsure that, to make this purchase from you, if i needed to send you an ECU with $$$ and you send me the new ECU, or do I just send you $$$ ? i think you answered it though. Thank you

[This message has been edited by PaulJK (edited 01-21-2008).]

rjblaze JAN 21, 10:07 PM
Darth, I just wanted to be sure I got the right ECM. I have a label on mine that has:

SERV. NO. 16196404 BFAU

*86BFAUM832210326*

and the MEMCAL reads DELCO BFAU 0172

I got this out of a Z-16 Beretta.....not sure what year, but an earlier post with an ECM look-up link shows this as a '91-'93 PFI LHO. The MEMCAL code doesn't match what the link has tho'. I know I read somewhere in this thread that there might be a company making a crank-trigger that could be used to convert the original Fiero 2.8 to use the DIS feature? Any line on this? Do you know who makes this? Lastly, can someone tell me how to get that darned distributor plug / oil pump drive out of a 3.1? I fought with two very exposed units on partially dismantled 3.1's but could not get them to pull out of the block, they spun freely, but would not lift out!

Thanks
cropduster JAN 22, 07:00 AM
Those plugs are just held in by stuck O-rings. Pull harder.

------------------
Mick
1986 GT

Pyrthian JAN 22, 09:12 AM

quote
Originally posted by rjblaze:

Darth, I just wanted to be sure I got the right ECM. I have a label on mine that has:

SERV. NO. 16196404 BFAU

*86BFAUM832210326*

and the MEMCAL reads DELCO BFAU 0172

I got this out of a Z-16 Beretta.....not sure what year, but an earlier post with an ECM look-up link shows this as a '91-'93 PFI LHO. The MEMCAL code doesn't match what the link has tho'. I know I read somewhere in this thread that there might be a company making a crank-trigger that could be used to convert the original Fiero 2.8 to use the DIS feature? Any line on this? Do you know who makes this? Lastly, can someone tell me how to get that darned distributor plug / oil pump drive out of a 3.1? I fought with two very exposed units on partially dismantled 3.1's but could not get them to pull out of the block, they spun freely, but would not lift out!

Thanks



I dunno - dont sound right....
last 4 numbers should be 7730
Darth Fiero JAN 22, 02:11 PM

quote
Originally posted by rjblaze:

Darth, I just wanted to be sure I got the right ECM. I have a label on mine that has:

SERV. NO. 16196404 BFAU

*86BFAUM832210326*

and the MEMCAL reads DELCO BFAU 0172

I got this out of a Z-16 Beretta.....not sure what year, but an earlier post with an ECM look-up link shows this as a '91-'93 PFI LHO. The MEMCAL code doesn't match what the link has tho'. I know I read somewhere in this thread that there might be a company making a crank-trigger that could be used to convert the original Fiero 2.8 to use the DIS feature? Any line on this? Do you know who makes this? Lastly, can someone tell me how to get that darned distributor plug / oil pump drive out of a 3.1? I fought with two very exposed units on partially dismantled 3.1's but could not get them to pull out of the block, they spun freely, but would not lift out!

Thanks



I haven't seen this ECM service number before, but the PROM BCC looks valid for this application. Does this computer you have look like the 7730 ECM I have pictured in this first post of this thread? If so, we might be able to use it (this might be one of those cases where GM updated the ECM for an application and changed the service number).

EDIT TO ADD: I just checked and I do have a stock BFAU chip program on file and it does appear to be compatible with the 7730 ECM; so the computer and mem-cal you have SHOULD work for this application.

-ryan

[This message has been edited by Darth Fiero (edited 01-22-2008).]