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anyone take apart/ adjust a #123 CPR/WUR? 200 1983

posted by  someone claiming to be bben on  Thu Apr 28 11:55 CST 2005 [RELATED]

242T

Troubleshooting a very rich warm up period. When cold the car will hesitate/ bog down and put lots of black smoke when accelerating. This lasts only a minute or two. If I let the car idle for a couple of minutes before going, the problem goes away.
A related problem is a surging idle after the first couple minutes of driving. Goes from 500rpm to 1200rpm, up and down, until the car is fully warmed up. The driveability during this time is normal. I have an A/F gauge: when the mixture is stoich, the idle is smooth as silk. When the mixture is rich the idle surges. Injector seals are new and the IAC is clean.
I don't have any fuel pressure numbers- which I know I should get. But I thought I would clean the old CPR as most of the symptoms point to it. All these cpr's look similar on the outside, but they are very different on the inside! Anyway, there is an adjustment screw on the bimetal strip that has got me curious!

Long story over; anyone familiar with this?






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