I thought I found a good score at the junkyard. I found this gold Integra LS 5spd with the ECU still in it. So I got the ECU, it looked in decent condition. I took it home and plugged it into my harness and my car doesn't start with it. I forgot to check if it was throwing a non-flashing led or not. But is there anything special I have to do with this ECU to make it work? It should just be plug and play or is there some extra thing you have to do.

Also I heard you could swap cases with a PM ECU. I tried to put the PG7 into my PM5 case and it doesn't fit FYI.

 

No one?

 

What year Integra? You need an 88-89 if you are going to be running a ZC in it with electronic timing advance. 86-87s have vacuum advance.
PM5 cases or DPFI for that matter are different than PM6 cases. If it is finned vertically around the perimeter of the case then it won't work. 88-89 PG7 boards fit just fine in 90-91 PM6 cases. I don't remember off of the top of my head if 88-89 PM6 cases were finned or whether they were smooth like the 90-91s.

 

you can use a PG7 in a PM case...i know cause i have one...

 

I just pulled a few ecus apart. 86-87 case is about 1/2 inch longer than the 88-89 externally and the board is longer as well. Sounds like you have an 86-87.

PM5 case doesn't work for PM6, 88-89 PG7 boards because of the three center mounting screw holes they are in different locations.

 

ive had no problems using the Si or the Teg ecu for my swap.

 

ike they said
u got the wrong ecu

i have had that happen to me before

it has to be a 86-87 ecu that ius vacum advance and doesnt work.,...
check the date on the cassin

 

EDIT - USDM beat me to it . but here's my post anyways.

If it's out of an 86-87 you'll have problems. they run vacuum advance on the dizzy.

I've run 4 separate 88/89 teg ECUs in my Si. Never had to do anything to them. just plug them in and go. the mounting points are different... but if you hack off the "long" arm you can get the thing to fit under the kick shield. but it should fire right up. maybe you have to do something with the dizzy wiring for a ZC? not sure.

I have one for sale that I got a week ago. I was asking 60 shipped but I'll let it go for less. I don't feel like ebaying. make me an offer if you need one. I tossed it in my car a couple days ago and drove around on it for a day. 50 miles with 4 starts. no issues.

 

This says '88. 8. 00 on the side of it. So I don't see how it doesn't work. Is there any way I can look at the motherboard and tell an 86-87 from a 88-89?

 

I tried googling a few things. couldn;t find anything. I also tried pgmfi.org but they seem to be down? So I can;t find anything useful .

One time I a PG7 did give me a hard tie for a few minutes. It wouldn't start on the first couple tries. then it started but threw a CEL. Then it started up just fine. maybe moisture got to it? open it up and check both sides of the board for corrosion.

you could also try baking it in the oven at 125 for 20 minutes or so. that'd get any moisture out of it. and 125 shouldn't harm it. since feasibly it'd see those temperatures in very warm climates.

 

Not sure if this will help but:
this is a PG-7 mounted in an PM-8 or HF case..

this is the original case it came in:

I had to drill one hole where the transistors mount to the side of the case..
If you do mount it in another case,make sure to get the plastic insulation
under the appropriate transitors or it will ground out the ignition and not run.



Modified by 88DXCRX at 2:51 PM 1/4/2004

 

just sold a PG7 to a guy on here in a PM6 case, it'll bolt right in but you have to relocate the CEL LED to the spot on the center of the board

 

I went back to the junkyard today. The ECU was from a 1989 Integra. Speaking of the ground out thing when I tried it I had it sort of half assed put back together. I put it back complete, maybe I should try it.

 

I opened the case again and noticed some water was inside. I went over it with a hair dryer for about 10 minutes. Popped it in and it fired right up. However my idle seems kind of low. I warmed the car up than pulled the hazard fuse to reset the ECU and I'm hoping that help since the idle seemed normal than. I didn't go out and drive it after that yet, I'm going to swap the cases from the PM6.

 

if there was water in there, I'll certainly reccommend the baking thing again. bake at 125 for at least 10 minutes. Chances are there is moisture where your'e not expecting there to be. if the parts get warm from normal operation with moisture in them it's *bad.*

Trust me, I look at failed parts for a living :D .

 

As for the case swapping I just decided to Dremel off the stalks on it and shove it behind the kick plate thing, only 2 nuts would go back on it but that is good enough, it ain't going anywhere. Seems to drive ok. I reset the ECU again and let the car idle, I think that helps it figure out the fuel maps.

 

unlike OBD1 ecus OBD0 ecus dont learn much of anything, about your idle, i think it's low because the PG7 controls the IACV at a different sampling rate then a PM6, adjust your idle screw and everything sould be fine

 

Ya... just adjust your IDLE screw dude.

 

i know that their is a BASTERD PG7 that does not work on MPFI. its in select integs, only difference in that ecu and other pg7's is the ECU box has a big X indented on one side of the ECU and it has a screw in the center of the ECU (in middle of the X). the Pg7's that do work are flat on both sides and have 4 screws on both sides (only on the corners). I dont know teh differences or anything i just know that the one with the X doesnt work after 3 diff pg7's with the X on it...