Post by
carcrazyguy »
https://forums.nicoclub.com/carcrazyguy-u35889.html
Sat Jul 04, 2009 1:03 pm
Quote »I just want to make sure my timing is at the right place thanks.[/quote]My question would be, "the right place for what?". In other words, factory timing, mild advance for more power, full advance for E85, Methanol, etc.? But if you are looking to get back to original timing (without a timing light), note the dirt or corrosion around the distributor bolts. In other words, if the timing was never adjusted (which is likely) you can remove one of the adjustment bolts and tell exactly where its washer sat for the past 16+ years (it should be shiny underneath).
But IMO, there is no reason for your timing to be off markedly unless someone has been tinkering...so your problem is likely the dozen other things that could be causing it. If you really feel the car is running too rich, I would check injector resistance and look for gas around the base insertion point to see if one is stuck open. But as a rule, the catalytic converter does the lion's share of the work...and an aftermarket unit may not be able to handle a car of this age (you didn't say if it was OE or not).
Anyway, one sure way to pass emissions...even if it doesn't fix your issue is to splash-blend maybe 30% E85 with the fill-up before testing. This is usually enough to drop numbers to legal levels, particularly if you were on the line before. Also, this helps to clean the combustion chambers too - an added (bonus) side effect. I like to run a 40-50% blend maybe every third tank myself...and my 20 year old 240 (with original everything) purrs like a kitten.