trouble with hot starts

RyanDL · 11-12-2009, 04:08 PM

I have a 2000 sierra and it will stard fine in the morning but after it warms up it has a terrible time starting but not if i start it up right after i turned it off, only if it sits for at least 5 minutes after being warmed up. It will start fine again after it cools compleetly down.

please help

1500cheyenne96 · 11-12-2009, 05:25 PM

HMMMMM kinda sounds like the starter solenoid is getting ready to **** out but thats weird that it will start right up after you shut it down usually it will start hard all the time when its hot but thats where id start could pull the starter off and have the solenoid tested at the local parts store

Faxcion · 11-12-2009, 05:28 PM

Is it trying to over heat?

RyanDL · 11-12-2009, 05:49 PM

nope no overheating or check engine lights

RyanDL · 11-12-2009, 05:51 PM

i had the alternater checked at advanced but they found no probs
thanks for the reply

my65coupe · 11-12-2009, 07:03 PM

sounds like th fuel press. reg is bad.
had same problem would start fine when cold but had to crank to get started when warmed up.
part was pretty cheap at auto parts store.

hotrodpc · 11-12-2009, 10:30 PM

I would be leaning toward fuel presure regulator or fuel pump getting weak. Sounds like a vapor lock kind of situation. So you shut it off hot, then it will start right up, why?, because the fuel has not had time to vaporize just yet. Wait a few minutes, fuel has vaporized. Wait til cool, fuel vapor disappears. But, can't really call it a vapor lock problem because its a computer controlled, injected engine. So where is the fuel vaporizing at? Maybe in the fuel rail, and the regulator or pump is not pushing enough pressure to get through and push fuel to the injectors. I would do a fuel pressure test. Just my thinking out loud and guessing. How about any codes or CEL.

Crmzendrgone · 11-13-2009, 07:57 AM

I agree with what everyone else is saying about the fuel, I would look at the fuel delivery system all of it and see what is happening.

RyanDL · 11-13-2009, 03:02 PM

thanks for the replies i try a fuel pressure test and go from there

11-12-2009, 04:08 PM	#1
RyanDL Junior Member Join Date: Nov 2009 Location: queensbury,new york Posts: 6	trouble with hot starts I have a 2000 sierra and it will stard fine in the morning but after it warms up it has a terrible time starting but not if i start it up right after i turned it off, only if it sits for at least 5 minutes after being warmed up. It will start fine again after it cools compleetly down. please help

11-12-2009, 05:25 PM	#2
1500cheyenne96 Senior Member Join Date: Sep 2009 Location: MIchigan Posts: 848	HMMMMM kinda sounds like the starter solenoid is getting ready to **** out but thats weird that it will start right up after you shut it down usually it will start hard all the time when its hot but thats where id start could pull the starter off and have the solenoid tested at the local parts store __________________ THEY DON'T BUILD THEM TO BE EASY TO WORK ON THEY BUILD THEM TO WORK "The Kamikaze"

11-12-2009, 05:28 PM	#3
Faxcion Senior Member Join Date: Jun 2009 Location: Calico Rock Ar. Posts: 65	Is it trying to over heat? __________________ тнuмрıиg мч sкoаl cаи

11-12-2009, 07:03 PM	#6
my65coupe Junior Member Join Date: Jun 2009 Location: chicago,il. Posts: 5	hot starts sounds like th fuel press. reg is bad. had same problem would start fine when cold but had to crank to get started when warmed up. part was pretty cheap at auto parts store.

11-12-2009, 10:30 PM	#7
hotrodpc Senior Member Join Date: Jul 2008 Location: OK Posts: 6,928	I would be leaning toward fuel presure regulator or fuel pump getting weak. Sounds like a vapor lock kind of situation. So you shut it off hot, then it will start right up, why?, because the fuel has not had time to vaporize just yet. Wait a few minutes, fuel has vaporized. Wait til cool, fuel vapor disappears. But, can't really call it a vapor lock problem because its a computer controlled, injected engine. So where is the fuel vaporizing at? Maybe in the fuel rail, and the regulator or pump is not pushing enough pressure to get through and push fuel to the injectors. I would do a fuel pressure test. Just my thinking out loud and guessing. How about any codes or CEL. __________________ *Winners NEVER Quit , Quitters NEVER Win !!!*

11-12-2009, 05:49 PM	#4
RyanDL Junior Member Join Date: Nov 2009 Location: queensbury,new york Posts: 6	nope no overheating or check engine lights

11-12-2009, 05:51 PM	#5
RyanDL Junior Member Join Date: Nov 2009 Location: queensbury,new york Posts: 6	i had the alternater checked at advanced but they found no probs thanks for the reply

11-13-2009, 07:57 AM	#8
Crmzendrgone Senior Member Join Date: Apr 2009 Location: Arizona Posts: 3,167	I agree with what everyone else is saying about the fuel, I would look at the fuel delivery system all of it and see what is happening. __________________

11-13-2009, 03:02 PM	#9
RyanDL Junior Member Join Date: Nov 2009 Location: queensbury,new york Posts: 6	thanks for the replies i try a fuel pressure test and go from there

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