CLASS RACER FORUM - View Single Post

buzzinhalfdozen · 07-02-2012, 02:13 PM

I would agree with the fuel pump theory, he should see EGT's or O2 readings spiking if this is the case. Though EGT's are slow to resond you should see a corresponding increase (perhaps delayed a bit) when your issue arises. If using O2's (which are for the most part MUCH faster) you should see it go almost dead lean during the misfire event, as the AFR needs to depart from normal quite a bit to induce a misfire. The part I can't get over is he states that the tach and datalogger RPM "jump around" normally this does not happen with a fuel induced misfire the RPM's simply flatten out. Joe

07-02-2012, 02:13 PM	#26
buzzinhalfdozen Senior Member Join Date: Sep 2006 Location: Bellevue Ohio Posts: 984 Likes: 0 Liked 11 Times in 8 Posts	Re: another egine miss I would agree with the fuel pump theory, he should see EGT's or O2 readings spiking if this is the case. Though EGT's are slow to resond you should see a corresponding increase (perhaps delayed a bit) when your issue arises. If using O2's (which are for the most part MUCH faster) you should see it go almost dead lean during the misfire event, as the AFR needs to depart from normal quite a bit to induce a misfire. The part I can't get over is he states that the tach and datalogger RPM "jump around" normally this does not happen with a fuel induced misfire the RPM's simply flatten out. Joe __________________ Joe Buchanan SS/BX 3117 Last edited by buzzinhalfdozen; 07-02-2012 at 03:26 PM.