I had an 86 325es that had been converted to motronic 1.3. It had a markD chip and ran great. Then it started messing up. It would constantly stall like I kept shutting the key off then on then off and on and repeated it. Idle would surge. Narrowed it down that when I put the 153 dme in it ran perfectly fine...well as well as a 153 can run.
So last month I did a shell swap. New shell was an 89 325i. Cool, the engine harness is finally correct to the body harness. Did the swap. Front end, rear end, all drivetrain and interior. The dash and all body wiring were still in the car unmolested. I decided to try out the chipped 173 again. Ran amazing for about a week and a half then the same previous issues occurred again. This time I knew I could check codes and pulled a 1264-ego heater. All the wiring is new as well as the o2 sensor. I checked fuse 9 after researching and it's fine and the relay is operational. I put a stock 173 in the car and same issues so I'm not thinking it's the chip. Could it just be something in the engine harness? It isn't the prettiest. I'm about out of ideas on where to check at this point. I'm currently running the 153 again with no issues. Are there any differences between the two dmes? Like does one read more efficiently and doesn't like what it is getting? I can get a video of how it runs with the 173.
Note: battery was disconnected before doing any changes between any electronic parts.
So last month I did a shell swap. New shell was an 89 325i. Cool, the engine harness is finally correct to the body harness. Did the swap. Front end, rear end, all drivetrain and interior. The dash and all body wiring were still in the car unmolested. I decided to try out the chipped 173 again. Ran amazing for about a week and a half then the same previous issues occurred again. This time I knew I could check codes and pulled a 1264-ego heater. All the wiring is new as well as the o2 sensor. I checked fuse 9 after researching and it's fine and the relay is operational. I put a stock 173 in the car and same issues so I'm not thinking it's the chip. Could it just be something in the engine harness? It isn't the prettiest. I'm about out of ideas on where to check at this point. I'm currently running the 153 again with no issues. Are there any differences between the two dmes? Like does one read more efficiently and doesn't like what it is getting? I can get a video of how it runs with the 173.
Note: battery was disconnected before doing any changes between any electronic parts.
Comment