87 4KQ "grumpy" when cold...

[Bill Phelps]

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Recent cold/snowy weather here in Mass seems to be affecting my 87 4KQ. The
car starts fine even when stone cold, so I'm guessing its not the
thermo-time switch. However, sometimes after starting the idle will
fluctuate slightly and the car will just about die when any accelerator is
applied. It does not stall, however. Seems to only last for the first 30
seconds to 1 minute or so then the car runs fine. If I wait for the car to
fully warm up all is well...



I have checked the NTC sensor per the Book of Bentley (OK) and cleaned the
connector. The car otherwise runs great and has no apparent vacuum leaks...



Could the ISV be hanging up when cold messing with the mixture. I've cleaned
it a few times...Ailing 02 sensor not heating up?



Any ideas?



Thanks



Bill