Rough Running Z

[crjspo23]

I ended up finding a rebuild service thru Rock Auto for about $200. The other source I found was Kurt White Racing - he had rebuiult ECM's in stock but they are $699. NAPA also will rebuild and will send it from any store for about $250 - probably the same rebuild service as Rock Auto (A-1 Cardone).

[scottfab]

Originally Posted by crjspo23

I ended up finding a rebuild service thru Rock Auto for about $200. The other source I found was Kurt White Racing - he had rebuiult ECM's in stock but they are $699. NAPA also will rebuild and will send it from any store for about $250 - probably the same rebuild service as Rock Auto (A-1 Cardone).

I would strongly suggest you do the following on the suspected "bad" ECM.
1. inspect all pins and straighten and bent ones. Also (and this is important) look for broken off pins.
2. pull the chip and re-seat it.
3. flex the wire harness a bit and reattach the ECM.

I have two ECMs and use to swap it out to get through the
state emissions test. Sometimes the connectors would become
not fully seated or???? When I pulled and reconnected all was fine.

I am curious on how you came to the conclusion it was a bad ECM?
I mean did you swap in a known good one?