I recently took the 87GL 2wd for our mandatory emmisions testing here in
Ontario, and failed.
Which parts of the engine should I be paying attention to when tuning it to
tolerable levels.

I was thinking replacing spark plugs, wires, distributor cap and rotor, fuel
filter, air filter, changing oil and timing.

Can anyone else give some insight or tips for a good tune-up?

Ken Madsen
Toronto Ontario

87GL (Flash)
87 Golf Diesel (Smokey)
95 Jetta GLX (Black Beauty)