Idle Flare UP - ZR-1 Net Registry Forums

XfireZ51 · 03-30-2010

Got the car out of its deep winter slumber today. Temps close to 60 here in Chitown and may hit 80 this week. Car started fine and idled fine for 10-15min, then the idle flared upwards to aboput 1500rpm and dropped. Did this a couple of time without any indication. It would idle back down to 750 or so. I had a code 43 which I believe is knock sensor, but I think this is a result of the flare-up not the cause. Cleared the ECM and drove him with no further DTCs. Nearing home I did get a bit of a backfire through the exhaust and noticed that the idle was not dropping as quickly. Anyone else experience anything like this after bringing car back from deep slumber?

03-30-2010	#1
XfireZ51 Join Date: May 2007 Location: Chicagoland, IL Posts: 9,709	Idle Flare UP Got the car out of its deep winter slumber today. Temps close to 60 here in Chitown and may hit 80 this week. Car started fine and idled fine for 10-15min, then the idle flared upwards to aboput 1500rpm and dropped. Did this a couple of time without any indication. It would idle back down to 750 or so. I had a code 43 which I believe is knock sensor, but I think this is a result of the flare-up not the cause. Cleared the ECM and drove him with no further DTCs. Nearing home I did get a bit of a backfire through the exhaust and noticed that the idle was not dropping as quickly. Anyone else experience anything like this after bringing car back from deep slumber?