Quote:
Originally Posted by stlrj
Yes you can, as long as you have the CO adjusting allen that every CIS owner should have, then back off the mixture to lean it out...what could be easier?
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If all that is off is his mixture. If, however the WUR isn't working properly then adjusting the mix will fix the startup issues, and created issues once warm - i.e. too lean.
Option 1: Get your hands on CP gauges and the proper CP tables (its different for different years) - make sure your WUR is working properly then adjust your mixture if it is. If its not, then there are ways to adjust it - do a thread search for "WUR" "Adjustable" or "Repair"
Option 2: Gut-check adjustments done while warm. Never adjust the CIS mixture screw while cold. During warm-up, the control pressure (and thus the mixture) will be constantly adjusting. Ideally, the engine should above 180F oil temp (well, that's where mine stabilizes on a "cool" day). From there, make an adjustment, then drive the car. A CO meter is best, but from a gut check, here's what I do.
1: Make a small adjustment, remove the wrench, get back in the driver's seat
2: Drive the car - preferably on an empty road. Run the RPMs up to 4k-5k, hold for a second, pop the clutch (specifically take the car out of gear while rolling). If the car is too rich, the RPMs will fall very fast, past the idle setpoint. If its way to rich, it will stall.
3: Stop, make small adjustments toward lean & repeat.
4: Make your last adjustment toward rich - i.e. go just past where the idle holds, then back up toward rich.
Hopefully, your idle mixture is too rich, and fixing that will fix your cold-start issues. If not, its something more complex so make sure you don't go adjusting your mix while the engine is cold.
Good luck.