All I need to convert a 1988 ECM to a 1989 ECM is the 89 MemCal and a 89 PROM with VATS disabled??? I understand that the cold start injector will no longer be needed. Where is a good place to find a used 89 MemCal? Junk yards seem to sell the ECM without the MemCals??? Should I try to use the the 88 MemCal? Thanks for the help!

 

You have several options:
- You could reprogram your 88 memcal with the 89 code.
- or Keep your original as a backup, and purchase a new 89 memcal from GM, then change the programming
- or Find a used 88 or 89 memcal at a yard, and reprogram it the way you want.
- Find a used memcal on Ebay, or classifieds, and again, reprogram it.

If you use the 89 code, yes, you would disconnect your cold start injector.

I kept my original, and bought a second one which I modified. That way I always have a backup.

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Mike Metzler (Desert86Roc)[*] Check Out:SpeedWorldMotorplex.com[*] Check Out:Chevrolet F-Body Online Part & Illustration Manual[*] My 86 IROC 305 TPI Page (406 build in progress)

ET's @ 1250 ft[*] 14.28 @ 95.461 mph (uncorrected, NOS, no headers)[*] 15.362 @ 88.238 mph (uncorrected, headers, no NOS)
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[This message has been edited by Desert86Roc (edited June 14, 2001).]

 

Can I use a JET adapter with 89 code and use the 88 memcal? Then I can save my orginal code for backup, right?? Thanks!