need an ECM for my 93 Z28

**Deviant93Z** · 12-30-2011, 10:32 PM

I hear ya, mine has demon issues with closed loop. I have literally replaced everything and have not been able to eliminate my issues. I wish the EFI connection kit wasn't so expensive, I want to get rid of the 93' system completely but the cost just doesn't seem justified on a bolt-on only car.

**grn95t/a** · 12-30-2011, 10:42 PM

mine wont go into closed loop either, but i figured it was the lazy o2 causing that. deff a bolt on everyday driver here. so no efi connection here either.

**Deviant93Z** · 12-31-2011, 07:53 AM

I've had to force mine to remain in open loop. When it shifts to closed it will barely run, horrible stumbling, missing, surging, etc.

**JPack** · 12-31-2011, 08:16 AM

Be sure to check all grounds. Also if you have a lower t-stat the car will bounce open/closed loop if not accounted for.

**Deviant93Z** · 12-31-2011, 10:06 AM

On mine at least, all of this has been accounted for. I have gone so far as to build a new wiring harness to no avail (I figured there might have been a short somewhere.)

**grn95t/a** · 01-22-2012, 11:15 PM

we'll i had the opportunity tonight to swap a good known ecm in. and it fixed the problem. so i'm deff in the need for a good used one. you guys still have them for sale?