Exhaust changes causes problems - ZR-1 Net Registry Forums

XfireZ51 · 01-16-2008

Roger,

Its possible that the less restrictive exhaust may have caused the AFR to lean out somewhat. Can you get a scantool on it? The 4500rpm region is where you might expect Knock Retard to come in and the hesitation could be the ECM pulling timing out.
Just possibilities which need to be verified by a scan.

01-16-2008	#11
XfireZ51 Join Date: May 2007 Location: Chicagoland, IL Posts: 9,709	Re: Exhaust changes causes problems Roger, Its possible that the less restrictive exhaust may have caused the AFR to lean out somewhat. Can you get a scantool on it? The 4500rpm region is where you might expect Knock Retard to come in and the hesitation could be the ECM pulling timing out. Just possibilities which need to be verified by a scan.

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