1985 IROC ECM service # - Third Generation F-Body Message Boards

ebrian · 07-11-2009, 01:27 AM

I have a 1985 IROC Z28 that had a fuel pump failure, I had the fuel pump replaced then the ECM smoked.... I went to the salvage yard to get a new ECM and never paid attention to the service # on my old one..to make a long story short that one didn't work..so I went to Autozone to buy the correct one, and that doesn't work either, I have a different chip for the ECM, BUT that doesn't work either...I think I need to find the service # for the original ECM and start over. It has the 5.0 TPI engine... The fuel pump seems to work through all these changes. I even changed the fuesable link going to the battery. Any help would be GREATLY APPRECIATED!!!!!!!

89F Body · 07-11-2009, 08:56 AM

There are 2 #s on the ECM.I have an 85Z ECM I just pulled from my 89Z and the #s are 7-6870 and the DC# is 0706JB.Hope this helps.

BlueIroc-Z · 07-11-2009, 08:56 AM

Is the "service #" the same thing as the "part number?" According to this it should be 1226870.

RBob · 07-11-2009, 08:58 AM

That would be the 1226870 ECM.

RBob.

ebrian · 07-17-2009, 01:57 AM

Thanks guys for the help with the service #, It looks like I have the right ECM, So I'm back to the fuel pump. I guess I have to to pull the gas tank and see if the guy I had replace the fuel pinched a wire or something....**** I should have just done it myself in the first place....