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Re: plug fouling (again), what to do? (archive)

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Posted by milton on September 09, 1999 at 13:16:36:

In Reply to: plug fouling (again), what to do? posted by Corey Turner on September 09, 1999 at 12:35:56:


Sounds like you already know this, but ...

1.5 mile trips are cruel to the '02. I would suggest that you make a ritual of taking the long way (maybe the extra long way) home every day.

When you read the owners manual that came with the car, you'll find that this was a recommendation from day one. The little 4s need exercise to keep their systems cleaned out.

If your plugs are reading rich, step up to hotter spark plugs (your parts guy can help you figure out which) for daily commuting, and pop the cold plugs back in when you are playing on the weekends. You need heat to keep plugs clean.

Good luck,


: I've just fouled 2 out of 4 plugs for the third time in about 3 weeks. This only 10 days after I got the car back from the mechanic.

: Disclaimers applying being that the engine is very shortly going to be swapped for a new one, for reasons of needing a valve job, burning tons of oil, and lots of blowby.

: I'm running dual 40 DCOES, just professionally synched and adjusted. Also a MDS 6a triggered by a stock distrib running to a bosch red coil.

: The car idles now smoothly at 1.3k, it doesn't idle smoothly at all under 1k. Er, it does when it has clean plugs anyhow.

: I am in Charleston, which is extremely hot and humid this time of year. I also park dowtown in a parking garage only 1.5 miles from my house, so my commutes are too short to even get the car completely warm, usually. On the days when I have to run all the way up to the top 8th floor of the deck, I find myself apologizing profusely to the car, as I cant help but feel badly about using those 4 synchronized barrels to inch up through the traffic of the garage.

: Im concerned about running too lean if i start playing with the idle screws. I understand fouling is caused by too rich, but how do you tell if you are going too lean?

: Any help appreciated.

: Corey

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