91' R/T Trimcal in 92' IROC R/T

[navyboy65]

Quote:

Originally Posted by nemiro A quick glance would seem that Pin 57 on the 92 SBEC vs Pin 8 on the 91 SBEC would be your answer. I will try to look it up more if I can find some time.

My thinking was also along those lines, I did the sawp so my 92 pin 57 is now pin 8. But looking at wiring diagrams and such.I am pretty sure that the ECU connects to the ASD directly, and I am pretty sure form that connection it gets voltage information?
I would really like to figuar what is going on so I can start to drive it and enjoy it again!
Thanks for the help,
Seth

[turbo_III]

Quote:

Originally Posted by navyboy65 But looking at wiring diagrams and such.I am pretty sure that the ECU connects to the ASD directly, and I am pretty sure form that connection it gets voltage information?

I decided to get back into figuring this out as I've had a '91 R/T SBEC lying around for a while but my car wasn't running...now that it is I hope to help solve these issues.

After reading what You posted previously that the ECU connects to the ASD directly, as opposed to what?...i'm kinda confused...not quite understanding what u mean...perhaps it's because I should be sleeping as it's almost 5AM. Perhaps you could shed some light on this.

[navyboy65]

Quote:

Originally Posted by turbo_III I decided to get back into figuring this out as I've had a '91 R/T SBEC lying around for a while but my car wasn't running...now that it is I hope to help solve these issues. After reading what You posted previously that the ECU connects to the ASD directly, as opposed to what?...i'm kinda confused...not quite understanding what u mean...perhaps it's because I should be sleeping as it's almost 5AM. Perhaps you could shed some light on this.

In this 91 digram( http://www.turbododge.com/dodge_pict...iring_p_27.jpg ) you can see the pin 8 connects to the asd relay. ALso onthat website that compairs the pins (Different Racing ) of 91& 92-93 aysr pin8 8 Dark Green/Black A61 F20 Voltage Sense
Then if you look @ the 92 diagram (http://www.turbododge.com/dodge_pict...iring_p_26.jpg ) and (http://www.turbododge.com/dodge_pict...iring_p_27.jpg ) You can see that pin 57 connects to the ASD just like it did in the 91 pin 8, also the web site says 57 Dark Green/Orange A142 Auto Shutdown Relay Sense but my wiring diagram for 92 says "Alternator Feed"!
So my thinking is that the ecu gets voltage info from pins 8 or 57, and that that info has to go through the ASD, so it maybe possible that if you have a bad ASD, maybe you could have the ecu codes/errors that I am getting and maybe the intermittant problems turning off the car???? Does that make any sense?????? Also look closely @ the 91-92 diagrams @ the ASD and think I is just discrepancey but the wires that go to 8 & 57 connect at different spots @ the ASD!

[turbo_III]

Quote:

Originally Posted by navyboy65 In this 91 digram( http://www.turbododge.com/dodge_pict...iring_p_27.jpg ) you can see the pin 8 connects to the asd relay. ALso onthat website that compairs the pins (Different Racing ) of 91& 92-93 aysr pin8 8 Dark Green/Black A61 F20 Voltage Sense Then if you look @ the 92 diagram (http://www.turbododge.com/dodge_pict...iring_p_26.jpg ) and (http://www.turbododge.com/dodge_pict...iring_p_27.jpg ) You can see that pin 57 connects to the ASD just like it did in the 91 pin 8, also the web site says 57 Dark Green/Orange A142 Auto Shutdown Relay Sense but my wiring diagram for 92 says "Alternator Feed"! So my thinking is that the ecu gets voltage info from pins 8 or 57, and that that info has to go through the ASD, so it maybe possible that if you have a bad ASD, maybe you could have the ecu codes/errors that I am getting and maybe the intermittant problems turning off the car???? Does that make any sense?????? Also look closely @ the 91-92 diagrams @ the ASD and think I is just discrepancey but the wires that go to 8 & 57 connect at different spots @ the ASD!

Yes, pins 57 (92) and Pin 8(91) are the same from what I understand so far!
My '92 Wiring Diagram also says "alternator feed" for Pin 57. I guess it's possible that You have a bad ASD relay, You tried swapping it out for another one? I see you also said you have intermittent problems with turrning off the car, interesting As for the wires connecting to different spots on the relay, my diagrams show them connecting to the same spot!

On another note I'm going to the wreckers in the morning so I'm gonna try to score some '91 cruise switches if I can. If I have time I will also be swapping my '91 SBEC on my '92 IROC as well so we'll see how it all pans out. I'll let you know how it goes and if I figure anything else out. :)

[turbo_III]

Just for reference, here are the '91 and '92 Diagrams I've been looking at from Mitchell On Demand.

'91 SBEC PD

'92 SBEC PD

[turbo_III]

Alrighty, so I got the '91 SBEC running in my '92 R/T but got the same results as you navyboy65. I get a Code 41(alternator circuit open or shorted) instantly even before starting the car. I disconnected pin 8(pin 57 from '92) and then I just get a code 42 (asd relay circuit). The car seems to drive normal, almost feels like it has more power than with the '92 SBEC. But as you had said you have trouble turning the car off sometimes, I had the same results although it only seemed to do it after I'd been driving the car for a while, as though it might be something to do with it being warm...I dunno.

Anyhow after looking at the wiring diagrams again I've discovered that the wire that comes from pin 57('92) is tied in straight from the alternator (DK BLUE wire). That same wire on the '91 is wired straight to the ignition switch and not the ASD relay circuit. I suspect that this is part of the issue, I just haven't decided what I'm gonna check next. I'll post my diagrams of the starting and charging circuits that I've been looking at for you to take a look at as well.

I've also noticed that the '92 has a fuel pump relay which is tied into the ASD relay circuit which the '91 does not have from what I can tell.

'91 Charging Circuit

'92 Charging Circuit

'91 Starting Circuit

'92 Starting Circuit

[nemiro]

Fuel pump relay is indeed a 92+ thing. I will look at diagrams this week on the ASD issue. This can be done, and without any CELs. I have done it before, but it has been years since.

[turbo_III]

Quote:

Originally Posted by nemiro Fuel pump relay is indeed a 92+ thing. I will look at diagrams this week on the ASD issue. This can be done, and without any CELs. I have done it before, but it has been years since.

Get a chance to have a look at anything?