Re: How can you run a richer mixture with CCC carb
The ECM is going to do its best to maintain a stoich mixture and as long as you're getting a varying dwell you can assume the ECM is happy-at least for that one bank that contains the O2 sensor. There's a few things you can check:
Do the plugs look different between banks? Some vacuum leaks may affect one bank more than the other and the ECM is only reading the driver's side. A problem in the carb, or idle mixture screws not set identically could also result in different metering between sides.
Have you tried driving with the dwell meter connected? If the meter is pegging rich while driving, conditions are getting out of the narrow range in which the ccc-qjet can adjust to.
Some variation in dwell is normal. You may want to check your throttle bushings though. I've seen worn ones cause an intermittent, variable leak that would cause rough idling as the dwell fought to keep mixture. In that case they were bad enough to cause the throttle to occasionally hang.
TPS voltage at 0.60 should not be a problem.
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