3 year old gas will cause misfires. Add a 1/2 can of seafoam to the gas tank and burn it off before making adjustments.
kEN On Sun, Apr 20, 2008 at 9:19 AM, Mark Cookson <[EMAIL PROTECTED]> wrote: > 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 > _______________________________________________ Miatapower mailing list [email protected] http://list.miatapower.net/cgi-bin/mailman/listinfo/miatapower
