help please - Won't Warm Start

Try this. Cycle the key on/pause/off several times before cranking the motor. Does this improve starting? If so the likely problem is fuel pressure leak down. This would confirm your test results that the system is not maintaining pressure between starts.

Where are some of the places for fuel pressure leak down?

• Fuel pump check valve
• flexible fuel line inside the gas tank between the fuel pump and gas tank hat
• fuel injectors. Note, you will not see a leaking fuel injector as it leaks inside the intake manifold.
• fuel rail pressure sensor (FRPS)

If leaking fuel injectors are suspected consider an injector cleaning and flow test service such as InjectorRX.com. Once cleaned and tested they are as good as new but cheaper.

One quick test for the FRPS is to inspect the intake vacuum reference line for raw gas.

Problems with the fuel pump check valve will require the gas tank to be dropped in order to trouble shoot.