2003 cadilac

Suspect faulty Canister Purge Valve, a compontent of the EVAP system, I posted the fix on another Cadillac with similar issue< I will try to find it and post it for you.

HERES THE PREVIOUS POST:Do you know if there are any Diagnostic Trouble Codes/check engine light stored in the ecm? I did some research and have come across a few Cadillacs with same problem, more than likely this is going to be your Evaporative emmissions (EVAP) canister purge solenoid/valve malfunctioning. The EVAP purge solenoid controls the flow of vapors from the EVAP system to the intake manifold. This normally closed solenoid is pulse width modulated (PWM) by the control module to precisely control the flow of fuel vapor to the engine. The solenoid will also be opened during some portions of the EVAP testing, allowing engine vacuum to enter the EVAP system. If yours is staying open while fueling it is letting more than ussaul gas fumes into the intake creating a hard start condition.

Thanks! I just purchased that 2day trying to find someone to install the dealership wants 100 per hour stating it is a 4 hour job.

You can hear the fuel pump rumbling when it idles and when you open the gas cap it stops. Is that the same? We just replaced it last week.

The evap purge valve is on the right side of the engine by valve cover, you must have gotten the canister vent solenoid which is under the car and would require some labor to do but the purge valve should not be very hard to change at all, you should be able to handle it, but make sure to get the right part(PURGE VALVE) not canister vent solenoid

I guess I should start over, after you get the car started(after refueling) does the car run ok, and does it start hard only after refueling?

After fueling is the only time it is hard to start any other crank is fine.

OK, I just wanted to make sure we were on the same page, I would lean towards suspecting that PURGE VALVE, which is under the hood, not the canister vent solenoid (under the car near fuel tank), two seperate evap compontents.

Thanks! That is the correct part. I think I was about to get swindled for labor time.I will find a independant to try to do the work. We had a really trustworthy guy here but he has passed away! It is a great loss. But again thanks for your help, Have a blessed day

Your welcome.