Hi Dave,

Forget these tune up places, they're oriented to throwing spark plugs into
cast iron V-8s. You can do the job! Note the follow:

There's a vendor on Ebay selling a 2.1L german tune up kit for $35.00.
Plugs, cap, rotor and air, oil & fuel filters. You can't steal the stuff for
that price.

The 2.1L doesen't have a PCV valve and the crankcase vent heater is
maintenance free.

If the ign. timing was set correctly 100,000 miles ago, it is still set
correctly. Basic timing doesn't change with a Digifant system. You know how
it changes? The "'experts" at Precision tune feel compeld to turn the
distributor because there is a bolt to loosen & tighten.

If the throttle valve brass air bypass screw has not been turned then the mA
current thru the idle stabilizer valve is still correct. If you haven't had
idle speed problems the this is probably OK.

If the air flow meter bypass screw has not been turned then the basic
mixture is probably OK.

The Digifant system was intended to be a low maintenance system that DOES
NOT need pepriodic adjustments. It does need resetting after peole who don't
know Digifant start turning screw just because they can.

I would add that ALL the fuel line should be checked & replaced if not
absolutely perfect. Also make sure the evaporative emission contol valve
closes at idle. A click can be felt in the valve from idle to off idle. The
valve is behind the air filter with vacuum lines attached.

Other than that a 2.1L tune is a snap. The Precision guys will know less
about this engine management system than you now do.

Regards,   John

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