1990 ECM computer rebuilder

[g27g28]

I was wondering if anyone knows of a vendor rebuilding ECM's.  I have a 1990 Fleetwood with the 4.5 liter engine with a little less than 80k miles and it is running rough.  I purchased used components from a junkyard in CA a couple of years ago but would like to find someone to rebuild the whole ECM.  Does anyone have any contacts?

[David King (kz78hy)]

Bruce Roe is very good.  Normally he specializes on the mid to late 70's fuel injection stuff.

Bruce reads the forum a lot, chime in Bruce if you find this thread.

David

[bcroe]

Sorry, I only do the 70s analog units (because I have a car).  But there is a lot of support for
the later digital units.  Bruce Roe

[g27g28]

Bruce,
Is there anyone you can point me to for help with the later units? 

[936CD69]

Greg, remanufactured computer modules (ECM) are readily available. One part number covers 90-93 C cars including deVilles, Fleetwood, and Sixty Specials, For example, Rock Auto parts carries one by Standard Motor parts and one AC Delco. They are also available on e*bay, but for a used one you need one from a 1990.

What is unique is the EEProm that is replaceable in the computer. 1990 has a unique part number. EEProms are rarely the issue in these cars.

Assuming that basic ignition has been eliminated as a cause for the misfire, 90s are somewhat prone to injector failure. If an injector fails, in most cases it damages the ECM. Dave Shepard on this site is a valuable resource for these cars. If he doesn't pipe up soon, send him a PM. I do know there is a procedure to test the resistance of the injectors as part of the diagnostic, and that a lot of mechanics replace all 8 injectors at once as a CYA.

HTH,

Craig