Coloradocurt

Runs perfect , drive in hot day 85+ degrees, stop for 30 min or longer and does not want to easily start (takes 10+ seconds of cranking - seems to starving for fuel)
Replaced fuel pump, check valve and fuel accumulator.
Didn’t cure the problem.
Any expert suggestions??
Thanks.

stlrj

Replace the thermal time switch. It supplies the ground for the cold start valve to operate when the engine cools to 45 degrees celsius. The cold start valve name is misleading. Cold/warm assist start valve would be more appropriate.

Coloradocurt

As the OP, I was posting this question/issue for a friend whose SC has been in a shop for 3 months and he still has doubts about the effectiveness of the "supposed" solution. My friend believes that an important factor is the ambient temperature, as the problem first appeared during the Summer and after he had a new AC system installed.
Can anyone suggest an Indy shop in Texas/Arizona who might be willing to provide some expert troubleshooting advice?

And let me just explain the original post a bit further: Cold start in the morning is not the problem - fires right up. But after running and then shut down - as in having a bite for lunch - that's when it has problem starting right up. Takes a bit of cranking, and then stumbles into an idle.

theiceman

that is usually the check valve from the fuel pump bleeding back , the accumulator , or the pump itself.
he needs a set of CIS gauges to check residual pressure and see if it is within spec.

dlg993

theiceman is correct in that the problem sounds very much like a failed check valve. In your opening question, you stated that the check valve had been replaced. Did you replace the check valve yourself, or have it replaced? Did you ask for the old check valve if someone else replaced it? The check valve, on my CIS system, was in the fuel line where it connects to the fuel pump, and required cutting the line to remove the valve. The replacement valve had a barb that was inserted into the fuel line. and a hose clamp applied.

prschmn

As others have said start with a pressure test. Additionally small vacuum leaks or sensor plate
rest position might be places to look-your isn't an uncommon problem.

stlrj

If you ground the red/black terminal on the thermo time switch, your hot start problems could be a thing of the past. That is, you could unplug the terminal and have someone ground it on the engine while you start it. If this works you could fix it the right way and replace it.




Cheers,

Joe