Marcus18 Posted July 27, 2003 Report Share Posted July 27, 2003 I have a 93 gp auto. someone replaced the engine and changed the wiring harness. the thansmission was stuck in second when put in drive or any other forward gear. there was a spare computer in the trunk so I swaped it in and now it's stuck in first. the check engine light is on. guy said it was knocking and pinging at heavy throttle. well the other day I was looking around under the hood and found that the ERG was unplugged I found the plug but it wouldn't fit. the wire harness is a 4 wire plug and the ERG is 5 wire. now what should I do? what year/car would have a 4 wire ERG valve? and I looked in my repair manual and it said bad ERG causes knock and pinging. would that being unpluged cause the transmission to go into safe mode? sorry about the length of the post. marcus Quote Link to comment Share on other sites More sharing options...
Redfox340 Posted July 27, 2003 Report Share Posted July 27, 2003 Welcome aboard. What year is the motor? Umm... did you buy the car like this? Sounds like you're in for a treat with swaping mix-match year parts and what not... Start off by scaning the system for the trouble codes and lets go from there. Post back when the codes are found! Best of luck! - Erik Quote Link to comment Share on other sites More sharing options...
Robby1870 Posted July 27, 2003 Report Share Posted July 27, 2003 I bet you have a connector for a vacuum EGR with digital EGR valve. Thats not going to work out. Get the codes like Erik said. I have an idea on the trans but I want to wait til I see the codes Robby Quote Link to comment Share on other sites More sharing options...
Marcus18 Posted July 27, 2003 Author Report Share Posted July 27, 2003 well as far as codes go. my scanner broke so I can't check myself. but on the windsheild it says: crank sensor ,coolant sencor knock sensor, those were giving them codes. now I don't know how old the writing is. there seems to be new sensers everywhere. I don't know if that was before they changed the engine or not. how would I check the engine year? can't I just find a ERG that is four wire and bolt it in the same position? yes I bought this car like this. I love the look of it. it could have had no engine and tranny and I probably would have bought it. I wanted it for a project/drag/street car. it looks more sporty than my STE Turbo. I'm going to check my scanner again today to see if I can get it to work. Marcus Quote Link to comment Share on other sites More sharing options...
Marcus18 Posted July 27, 2003 Author Report Share Posted July 27, 2003 well I was looking through my scanner manual and it told me about field service mode. never knew about that. anyway I jumped a and b and it came up with code 43 faulty knock sensor or mem-cal any thoughts? if it's the memcal then thats what would be causing my tranny to lock up right? if the erg isn't hooked up then that would give me knock and ping setting off the sensor right? marcus Quote Link to comment Share on other sites More sharing options...
Redfox340 Posted July 27, 2003 Report Share Posted July 27, 2003 well I was looking through my scanner manual and it told me about field service mode. never knew about that. anyway I jumped a and b and it came up with code 43 faulty knock sensor or mem-cal #43 only? Did it run a code #12 first? Did you let the SES light cycle completely? Well, if you get a #12, your MEMCAL hasn't died out yet. Find a working donor Knock Sensor and see where that gets you. You've got a trial & error situtation on this mess. But I'm totally suprized with the EGR not plugged in that the ECM doesn't recognize that. Field Service mode...? So you're saying that you ECM is in Default, or Back-Up mode? What ECM's do you have in your possesion? (Year, model, engine size) References: W-Body.com - ECM Trouble Codes W-Body Performance - Emissions & Drivability Controls - Erik Quote Link to comment Share on other sites More sharing options...
Marcus18 Posted July 27, 2003 Author Report Share Posted July 27, 2003 yeah it was flashing code 12 also. I didn't think that was of importance. I just crossed the a pin with the b pin with ignition on and the ses light flashed the codes to me. the scanner I have said thats field service mode. both computers are for a 3.1L I think. one was in the trunk with a bunch of wiring harness pieces. the other one was plugged in. the one that was plugged in when I got it made the transmission stick in second. the one that was in the trunk I swapped in and it made it stick in first. both computers show code 12 and 43. where is the knock sensor located? I'll have to buy one or something. my dad just got home and he talked to a guy who knew the owner that did the swap and he said the guy stuck a older bottum end in it with the gen 2 top end. and he could never figure out the electrical problems. my dad also landed me a series 2 3800 s/c engine and tranny with 13K miles on it for $500 no wiring harness though. he worked out a deal with him to do some yard work in trade for it. YAY!! I still want to figure this out first. this is what is shown on the sticker on the computers: computer 1 sticks in second serv. no. 01227727 bauh 866291 m212903060 16176291 (bar code here) 866291m212903060 computer 2 sticks in first serv. no. 01227727 arzw *868461 m910911733* 16138461 (bar code here) *868461m910911733* don't know if that helps marcus Quote Link to comment Share on other sites More sharing options...
Redfox340 Posted July 28, 2003 Report Share Posted July 28, 2003 where is the knock sensor located?I'll have to buy one or something. my dad just got home and he talked to a guy who knew the owner that did the swap and he said the guy stuck a older bottum end in it with the gen 2 top end. and he could never figure out the electrical problems. my dad also landed me a series 2 3800 s/c engine and tranny with 13K miles on it for $500 no wiring harness though. he worked out a deal with him to do some yard work in trade for it. YAY!! I still want to figure this out first. The Knock Sensor should be located on the lower right (driver) side of the engine block itself. The guy did a Gen II top end and running a Gen I low end? That's what could be your entire problem. Since some of the Gen I blocks are not - EFI there could be (in theory) no placement for the low end sensors. If you've got the L67, get rid of that contraption of an drivetrain set-up and drop that motor in. You should be able to find harnesses at either a dealer or a local yard. - Erik Quote Link to comment Share on other sites More sharing options...
Marcus18 Posted July 28, 2003 Author Report Share Posted July 28, 2003 well I figured out the ERG problem. it's a 90 and back ERG. so I have to find a ERG from a 92 or 93 3.1L my dad says I have to figure this out before I can swap because it's a perfectly good running engine. so I'm going to figure this out. I just hace to fix the knock sesor problem marcus Quote Link to comment Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.