Spark plug fouling advice?
Thread Starter
Melting Slicks
Joined: Jun 2013
Posts: 3,065
Likes: 39
Spark plug fouling advice?
Hello everyone. I had to get colder spark plugs so I could use nitrous for my 85 Corvette. I'm having a bit of an inconvenience here. My vette primarily stays in the garage so typically I have to start it up for a few seconds frequently to move in and out of the garage when I need to do something in there. So my plugs are fouling from too many cold starts without letting it reach operating temperature.
Since the ECM commands a richer mixture during cold starts, if I increase ignition timing for cold starts in the tune, will that help solve my fouling issue?
Thanks
Since the ECM commands a richer mixture during cold starts, if I increase ignition timing for cold starts in the tune, will that help solve my fouling issue?
Thanks
Team Owner
Joined: Oct 2004
Posts: 81,241
Likes: 3,063
From: altered state
St. Jude Donor '05
Shouldnt make your plugs foul you got something more going on
On your header Q cut the collectors off and get some new ones welded on or replace the headers leaks and EFI dont play well
On your header Q cut the collectors off and get some new ones welded on or replace the headers leaks and EFI dont play well
Drifting
Joined: May 2007
Posts: 1,426
Likes: 165
From: Motor City
Agreed. Plug temperatures have to reach 500degC in order for carbon to naturally burn away which is called the "self clean" temp. Even with a few minutes of idling they should clean.
How cold of a plug do you have in it?
How cold of a plug do you have in it?
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Thread Starter
Melting Slicks
Joined: Jun 2013
Posts: 3,065
Likes: 39
Yeah and if it's a hot idle I could idle all day no problem. But it's rich when it's cold and it never a gets enough time to warm up when I pull it in and out.
Race Director
Joined: Apr 2003
Posts: 17,700
Likes: 1,667
From: moraga ca
I'm running NGK 7s in my Vette. I have no fouling. Maybe as suggested, push the car out and push it back. I don't like to cold start any of my cars without letting them warm up. A lot of creatures are left in the cylinders after a cold start and shutoff.
