weird starting issue

[smug]

My car takes about four seconds to start when the engine is cold or after it has been sitting for more then about an hour. If I restart the car with in an hour of it running the engine fires up as soon as I turn the key. It almost seem like the fuel is bleeding off at the pump after shut down but I have not seen any leaks. The car starts every time but some times it just takes longer then normal after not running for more then a hour.

What should I be looking for?

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[RICH17]

Do you let the pump prime before starting it every time?

 

[smug]

Do you let the pump prime before starting it every time?

yes and i have primed the pump two or three times and no difference

 

[RICH17]

How's it running on the e85? Tune go okay?

 

[smug]

BTW this happened on gas and E85, my 42lb injectors and the 60lb injectors

 

[smug]

How's it running on the e85? Tune go okay?

Still trying to dial it is, no knock at all.

 

[RICH17]

Sounds like a dying fuel pump no? I would see if she pisses out of the bleeder on the rail after she sat for a hour or so after running.

 

[smug]

maybe
the racetronix pump is about 5 or 6 years old

Newer battery
Fuel pressure regulator?

 

[RICH17]

Pull the vacuum line on the reg and check for fuel.

Since the FP is that old I'd grab another one just in case. Especially since you just went e85

 

[TommyGloves]

Record your coolant temp when you start the car and it is a hard/delayed start. It might be related to the Open Loop Base AF by Coolant table. It might be either rich or too lean. What TB do you have?

 

[smug]

yup 0 fuel pressure at the rail after sitting for a while

Bunch of fuel squirts out of the valve right after I prime the pump.

 

[smug]

Record your coolant temp when you start the car and it is a hard/delayed start. It might be related to the Open Loop Base AF by Coolant table. It might be either rich or too lean. What TB do you have?

Northstar throttle body

It seems that coolant temp does not matter. I can start the car cold, have a hard start and let it run for 10 seconds. Shut it down and restart and it will fire right up with out an issue. On the other hand I can start the car cold, have a hard start and go out for a long drive getting the engine hot, let the car sit for am hour and the engine will still be warm and it hard start again.

 

[G_T_O]

Mine did the same thing after I installed the racetronix pump.

 

[smug]

Second issue is that while the engine is cold sometimes it will surge really bad for a few minuets. If I lightly press the gas and hold the engine rpm around 1500 for a minuet or two then everything thing is fine. What tables in DHP should I look at for correcting this?

 

[JDrach]

My car would take anywhere from 2-7 seconds to start sometimes. Pumped primed once or several times too. Changed the fuel pressure regulator, and injectors. Nothing worked. Changed the fuel pump and instantly starts up every time.