2000 6.0 starting issues

Skipponator · August 11, 2005

Sometimes I go to start my truck and it just cranks over fast and won't ire. I stop cranking and try again and always fires up then, but sometimes it fires up right away. I am thinking new plugs/wires may fix this problem? I have 141k on my 2000. Any info is greatly appreciated.

-Skip

PewterC3 · August 11, 2005

sounds like your fuel pressure is bleeding off and takes a while to build back up. Turn the key on and let it sit for 5-10 seconds then hit the key and try to start. If it fires right up, its possibly the fuel pressure regulator?

kc5deb · August 11, 2005

EXACT problem I'm having with my 6.0L. But, my fuel pressure regulator isn't showing the typical signs of failure; I can take the vaccum hose off, and no sign of gas. I can try to start it after it sets, and all I get is "chug chug chug ch-ch-chug". But, if I turn the key on without starting it, I can hear the fuel pump kick in, and after I let it run, it starts up fine.

Is it possible for it to fail and bleed off pressure without leaking gas back into the vacuum hose?

REKIII · August 11, 2005

My 8.1 is doing the same thing, except if I let the pump run it doesn't seem to help the prob. Seems to be totally random. Sometimes it will take 3 tries and others it will pop with just a flick of the key.

Another thought I had was a tired fuel pump.

Bob

99-2door · August 11, 2005

Sounds like ignition switch failure to me.

You may have to do the re-learn for the PASSLOCK II after you replace the switch.

Skipponator · August 12, 2005

Thanks for the input, I'll try waiting a few seconds to start it and see if it changes anything, I'll do a wire/plug change also. What's a good combo on these engines? I pretty much know nothing about them right now as I basically was into modding cars and now I have to learn a whole new engine. Thinking of MSD wires as I have had good luck with them, but I havn't decided if I should use factory Delco plugs or if there is something else people reccomend. Don't plan on modding the truck, but you never know, I guess for sure I am going to do a K&N drop-in but that about does it.

-Skip

PS: Is there any way to test the ignition switch?

99silveradoz71 · August 15, 2005

Similar symptoms last year with my 5.3. They replaced the pump then. The truck then ran rough recently and again did the wouldn't start on the first try, but fire right up on the 2nd deal. The FPR looked ok the night I took it in, but they kept it to look at it the next day for another issue, and sure enough, the FPR showed moisture, so they replaced it and no issues since.

Skipponator · August 15, 2005

And where is the FPR? Thanks,

-Skip

99silveradoz71 · August 15, 2005

On my truck it was on the right side of the valve cover when standing in front of the truck looking into the engine compartment.

kc5deb · August 16, 2005

Alrighty, very weird... The last 4 days it's done nothing but rain and stay cool, and my truck has started without failure every single time I've turned the key... Before, whenever it'd turn off like it has, it would ALWAYS studder before starting.

Skipponator · August 18, 2005

Put a new FPR on tonight ($73 later and the easiest thing I've ever done with a vehicle) and still has the same issues. My next step is plugs and wires.

-Skip

SalineSolution · August 22, 2005

Put a new FPR on tonight ($73 later and the easiest thing I've ever done with a vehicle) and still has the same issues. My next step is plugs and wires.

-Skip

<{POST_SNAPBACK}>

If its a 4x4 watch that electronic transfercase switch. If it is malfunctioning it will create that exact problem. It's some type of safety system.

Skipponator · August 23, 2005

Put a new FPR on tonight ($73 later and the easiest thing I've ever done with a vehicle) and still has the same issues. My next step is plugs and wires.

-Skip

<{POST_SNAPBACK}>

If its a 4x4 watch that electronic transfercase switch. If it is malfunctioning it will create that exact problem. It's some type of safety system.

<{POST_SNAPBACK}>

Yes it's a 4x4, how do you test the switch to tell if it's bad or not?

SalineSolution · August 25, 2005

No Idea how to "test" it. I have had mine replaced for the starting problem. It has some saftey mechanism inside that will not allow the truck to start if it is in between gears or something. The truck will turn over fine, but will not fire. It might need to go to the dealer. I'm not sure how it works. I hate the thing and wish I had a manual transfer case.