Hi All, Yesterday I spent an hour or so driving around, trying to get rid of the three year old gas in my Miata's tank as well as do some tuning (wide-band O2 installed).
It runs well enough in the non-boosted zones for me to think everything is fine, but when it gets into boost, it starts misfiring. At first you feel it like it has dropped a cylinder, then, sometimes, it will be like fuel cut. I have dual EGT probes in the manifold, one on #1 and one on #4, in 4th or 5th gear during a long boost run, one of them (I wish I had them labeled), will read 1400F and the other 700F when this is happening. Normally they are both reading around 1200F, or are at least reading roughly the same value. I have the 1.8 coils installed on my 1.6, but I don't think it's the splice job since the car runs well enough the rest of the time for me to think that this is a problem with a specific cylinder and not the coil, but if knew the answer, I wouldn't be posting here, so feel free to correct me. ;-) The same coil pack does 1/4 and the other one does 2/3, so it doesn't seem like it could be a coil issue, right? Can half the coil go? Do spark plugs and wires go bad while just sitting there? Any suggestions on how to start to diagnose this problem? Thanks, Mark _______________________________________________ Miatapower mailing list [email protected] http://list.miatapower.net/cgi-bin/mailman/listinfo/miatapower
