Vehicle in question is a 92 with 165k.
It has a slightly rough idle and has developed a hard starting problem. When cold it will not start on first crank- turns over nicely but won't fire. Starts on second crank or if fed a little gas will start on first crank. No CEL and I have not checked with the code reader.
I have come across some discussion on usenet that the hard start is symptomatic of a faulty IAC. The IAC has been cleaned several times with carb cleaner and the plunger seems free to travel.
Do the symptoms implicate the IAC?
Is there a test for the IAC other than replacement?
Charlie