[ossiblue]

Typically, the WUR will not have current when it is warm. You did not post the year of your car, but CIS cars after 75 have a thermo time switch which interrupts current to the WUR when the engine is warm or the ignition has been on for a while. If the engine is cold, there should be current to the WUR.

Your cold start issue is likely from an out of spec cold controlled pressure from the WUR, which would not be caused by lack of current to the heating element. You should begin by using fuel pressure gauges to measure your cold controlled fuel pressure, it's probably too high and causing a lean condition. As the engine warms and the WUR warms, the pressure should rise to lean out the fuel mixture and that is apparently what is happening.

Do a search for "WUR pressure test" on this forum and you will find lots of threads explaining the procedure for testing. If you don't have a set of fuel gauges, invest in them now--well worth the money and absolutely necessary to trouble-shoot the CIS system.

Let us know what you find, and post your car year and model in your signature or screen name ID so all will know how to best respond you your questions.