starting problems..

[ramair6]

hey guys i am having trouble starting my car. The car starts up great when cold but if i let it sit for 20 min or lil longer it will crank and eventually start up. I have replaced my battery, starter, starter relay, ignition relay , fuel pump relay , fuel filter, spark plugs , wires, checked grounds and made sure they were clean and tight. I dont have a SES light on too. I am leaning towards the fuel pressure regulator. I know if thats the problem to check it to pull the vacumm hose to the MAF off and see if fuel is in it right? Sometimes when i start it cold and let the pump prime i hear a loud "errrrr" sound for like a second too.Any ideas would be great.

[97rs4life]

Re: starting problems..

when it is still warm and you can't get it to start do you hear the fuel pump on yet?

[ramair6]

Re: starting problems..

i can hear the fuel pump, i had someone just now turn it to ON position and i went under and listened for it to prime. i forgot to mention the car has 45k on it too. could it possibly need new oxygen sensors? someone had mentioned that it could be my coolant temp sensor too but i am not sure.

[97rs4life]

Re: starting problems..

what year is it since it only has 45k?

[ramair6]

Re: starting problems..

the car is a 2000