check plug gaps too Steve On Sun, Apr 20, 2008 at 3:20 PM, Ken Bogart <[EMAIL PROTECTED]> wrote:
> 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 >
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