Evap Problem

[Tom165983]

Alright guys heres the problem that i am having with my truck, when i go to start her up in the morning she runs great, But when i shut her off for i guess about 15 Mins after a drive to the store or whatnot she gives me a problem.

It starts but but shakes vigorously and dies on me? what i have noticed is if i turn the key to the accessory spot about 3 times and then try to start she goes fine?


When i bought is the engine light was on and it had given me a code for the evap system and and the catalyst converter it said something is a closed loop cant think right now. I know the loop thing is supposed to stay closed during warm-up but after that its supposed to open but it does not . i cant remember what the closed loop thing was called i will get back on the name.

Although i do know it have something to do with the evap tank or the valve connected to it but cannot pinpoint if its got a hole in the tank the lines or its just a sensor or valve?

Any Ideas? Is this problem common?
Most appreciated for the advice
Tom,

 

[Sams01XplrSprt]

welcome

 

[swetrid]

Sounds like starting problem is fuel pump, there is a check valve in the pump that is supposed to keep fuel pressure from dropping off and causing hard start.

 

[BrooklynBay]

Welcome to this forum! Find out what the code numbers are, and post them here.

 

[Tom165983]

the code she has been bringing up recently is P0420.