EGR disabled and Knocking

[Brent]

I disabled EGR (1b3 set to 00) on my stock '91 C2500 350/A4, 7747.   When I
took it for a test drive it knocked alittle during cruise and light throttle
accel.   Should disabling EGR cause it to knock?  I thought it would run the
same as with EGR on, seeing how EGR adds spark and removes fuel.

Regards
BrentH.


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