BodybyFisher Posted March 2, 2008 Report Share Posted March 2, 2008 I fixed the links above. By the way, I am Scotty in the Deiter thread. Pre-1995 - DTC codes OBD1 >> 1996 and newer - DTC codes OBD2 >> https://www.obd-codes.com/trouble_codes/gm/obd_codes.htm How to check for codes Caddyinfo How To Technical Archive >> http://www.caddyinfo.com/wordpress/cadillac-how-to-faq/ Cadillac History & Specifications Year by Year http://www.motorera.com/cadillac/index.htm Link to comment Share on other sites More sharing options...
CarolinaGreg Posted March 6, 2008 Author Report Share Posted March 6, 2008 Well folks I think I may have finally fixed it..FINALLY!!! We changed the ECM tonight for one that came from a junkyard car (BTW, the unit had been replaced in the junkyard car it came out of)..And she appears to run great. I could tell as soon as I hit the switch when we cranked it, we had found the problem. We ran the idle learn procedure and set the timing..drove it a few miles and it seems to be A-OK. I won't be able to drive it more until the weekend, heading out of town for a work trip tomorrow & Friday... I just wanted to thank everyone here for all the information during this ordeal..all of your tips really helped a lot. I plan to continue visiting here...once you have that Cad in your blood, it never goes away...As much as I hate to, the wife tells me I have to sell it now that it is fixed, since I have bought the Eldorado..Awful expensive to maintain insurance on 5 cars with only 2 drivers. I will post it in the for sale section once I have it ready. Thanks again, Greg "Torque it down 'til it strips. Then back off half a turn." www.picturetrail.com/carolinagreg Link to comment Share on other sites More sharing options...
BodybyFisher Posted March 6, 2008 Report Share Posted March 6, 2008 Hey Greg, I am glad you finally got it fixed. That is what I finally thought in my post #17 above, the ECM causes FITS..When you have tried everything and its still a mess, look at the ECM/PCM. Its the hardest thing to diagnose. Thanks for reporting back your findings and experience, Mike Pre-1995 - DTC codes OBD1 >> 1996 and newer - DTC codes OBD2 >> https://www.obd-codes.com/trouble_codes/gm/obd_codes.htm How to check for codes Caddyinfo How To Technical Archive >> http://www.caddyinfo.com/wordpress/cadillac-how-to-faq/ Cadillac History & Specifications Year by Year http://www.motorera.com/cadillac/index.htm Link to comment Share on other sites More sharing options...
adallak Posted March 6, 2008 Report Share Posted March 6, 2008 Greg, thanks for the update. Glad, you fixed it. The saddest thing in life is wasted talent Link to comment Share on other sites More sharing options...
CarolinaGreg Posted March 8, 2008 Author Report Share Posted March 8, 2008 Went out running errands this morning in the 92, the good news is, the dead miss problem is gone. The bad news is, I think we have created another problem, but I think (I hope) we have the solution. It seems to surge and chuggle at idle, but seems to have full power under load. twice it seemed to "fall on its face" when I took off from a stoplight..As I researched on the board here, we didn't change the MEM-CAL/PROM when we swapped the ECM out from the junkyard car. Would this be causing my problem? From the below link, it sounds like the general consensus is the PROM stays with the car..??? Should we swap it out with the one that was on the car to begin with? My fear is my dead miss would come back, but what do I know.... Also now getting codes E47 and F32, which seems to point to ECM problems.... Don't you love fixing one problem and causing two more?? Grrrr "Torque it down 'til it strips. Then back off half a turn." www.picturetrail.com/carolinagreg Link to comment Share on other sites More sharing options...
adallak Posted March 8, 2008 Report Share Posted March 8, 2008 Don't you love fixing one problem and causing two more?? Grrrr If I do not know what's going to be the next fix after fixing something, I get very nervous. Yes, the prom might be a problem. The saddest thing in life is wasted talent Link to comment Share on other sites More sharing options...
CarolinaGreg Posted March 10, 2008 Author Report Share Posted March 10, 2008 Have you ever felt like you were taking 1 step forward and 10 back? I changed the MEM-CAL, and the car actually ran worse. The dead miss on #2 and #7 stopped, did fine going down the road..but it wouldn't idle, at all. Was surging and chuggling and giving the two codes metioned above. Tried the idle learn procedure and it would clear up, but when you shut the car off, it would go right bhack to crap when you started it back up. So, I put the old ECM back in, just to see what happened. The idle problem and codes disappeared, and the miss on #2 and #7 came back. So, the junkyard ECM was obviously bad. Since I bought it at Pull -a-part, with the warranty..I jumped in the truck and took off. Found another car that was wrecked and the ECM had not been tampered with (the first one I bought had been repleaced in a car that wasn't wrekced).. (An aside, if you are in the southeastern US or the Ohio valley, I highly recommend Pull-A-Part, they have one price shopping on used parts, the ECM for my Cadillac was the same price as one for a 98 Honda Accord, a fender for a Chevy truck is the same price as one for a Mercedes.. check it out at http://www.pullapart.com/ Got home, plugged up the 2nd computer and IT RUNS GREAT!! I didn't have to do a thing. No ISC learn, no timing set..Just plug and play. I don't have it in me to trust it just yet to make the 20 mile drive to uptown Charlotte tomorrow,just yet,, but I am going to try some close to home driving first. But I really think it is finally FINALLY fixed. I'll post an update once I drive it a little this week. "Torque it down 'til it strips. Then back off half a turn." www.picturetrail.com/carolinagreg Link to comment Share on other sites More sharing options...
PAUL T Posted March 10, 2008 Report Share Posted March 10, 2008 Went out running errands this morning in the 92, the good news is, the dead miss problem is gone. The bad news is, I think we have created another problem, but I think (I hope) we have the solution. It seems to surge and chuggle at idle, but seems to have full power under load. twice it seemed to "fall on its face" when I took off from a stoplight..As I researched on the board here, we didn't change the MEM-CAL/PROM when we swapped the ECM out from the junkyard car. Would this be causing my problem? From the below link, it sounds like the general consensus is the PROM stays with the car..??? Should we swap it out with the one that was on the car to begin with? My fear is my dead miss would come back, but what do I know.... Also now getting codes E47 and F32, which seems to point to ECM problems.... Don't you love fixing one problem and causing two more?? Grrrr The codes above indicate that the PCM and the BCM are not communicating due to a short, faulty connection, loss of power, or bad ground to the BCM. Sounds like you got it fixed now with the new PCM. There was a recall on the MEM-CAL/PROM for 92. It involved the amount of emissions the car put out. I remember when I had mine changed it made my gas mileage drop a gallon or 2. I almost took it back and had the old one put back in. Link to comment Share on other sites More sharing options...
CarolinaGreg Posted March 17, 2008 Author Report Share Posted March 17, 2008 It's fixed!!! Drove it all weekend and it ran GREAT!!! So now, she's for sale. See my post in the for sale section for all the details..Thanks again to everyone for all your help and tips. "Torque it down 'til it strips. Then back off half a turn." www.picturetrail.com/carolinagreg Link to comment Share on other sites More sharing options...
BodybyFisher Posted March 17, 2008 Report Share Posted March 17, 2008 Glad you got it fixed Pre-1995 - DTC codes OBD1 >> 1996 and newer - DTC codes OBD2 >> https://www.obd-codes.com/trouble_codes/gm/obd_codes.htm How to check for codes Caddyinfo How To Technical Archive >> http://www.caddyinfo.com/wordpress/cadillac-how-to-faq/ Cadillac History & Specifications Year by Year http://www.motorera.com/cadillac/index.htm Link to comment Share on other sites More sharing options...
jomo924 Posted March 19, 2008 Report Share Posted March 19, 2008 Well the goose chase continues. It wasn't the hall effect switch, module or coil. I traced every possible wire I could find going to the distributor and all were in good shape. It was still missing bad and we pulled plug wires off (after disconnecting the ISC to keep the idle consistent) and it isn't firing on cylinders 2 and 7. Took those plugs out and they were extremely fuel fouled. Cleaned them up in the bead blast cabinet and reinstalled and was running fine..drove it about 2 miles and was running like brand new. Got back home and the miss started again. Keep in mind, we have checked the injectors and all were within spec, but we decided to switch he injectors between #'s 5 & 7 to see if we could move the miss to #5. Didn't work. I looked at the print outs of the wiring schematic of the injectors that I found on this site, and the 2 and 7 do not share anything in common, both go to different fuse blocks. For giggles, we checked the compression on #7, and it was over 100 lbs. We have traced it down to these two cylindrers, but just don't know what could be causing the problem. I have ordered a GM service manual and should be here first of the week, hoping to maybe be able to trace some more with it. I am wondering if somehow the ECM is not sending the signal to the these injectors?? Still getting no codes on the DIC. This is the darndest thing I have ever seen, and keep in mind my mechanic (my brother) has over 15 years mechanic time under his belt, and we do all our own work...and we are the people that get called when someone else can't figure something out. and we are just stumped. If we can't figure it out with the service manual, I guess I am going to have to take it somewhere.. Or sell it one. Thanks, Greg Link to comment Share on other sites More sharing options...
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