[quote=Ccmano;57632]
Quote:
Originally Posted by Robm3
My ECU sometimes plays up and doesn't run the secondary injectors also the idle can fluctuate sometimes, will this chip sort that (assuming Secondaries issue is just the ECU)?
quote]
I think I can almost guarantee you that your secondary issue is not related to the ECM or the chip. Most secondary issues are related to vacuum problems, mostly leaks in the system, the idle issue would point to that as well.
Here's a link to a good overview of the system and diagnosis.
http://www.corvetteactioncenter.com/...diagnosis.html
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One possible exception is if you have a 91 Z with a 90 chip, the secondaries will not initiate. 90 Z is apart from all the rest.