Won't idle on first start

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Oct 16, 2010 | 11:36 AM

Diamond-X

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Joined: Nov 2003

Posts: 78

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From: so Cal

Won't idle on first start

I have a 2001 V-10 gasoline 6.8l Excursion. Recently, it's been unable to idle on the first start after sitting a few hours.

I think it's a fuel pressure problem, either from a leaking injector or fuel pressure regulator or check valve (if there is a check valve?)

I replaced the fuel pump about 10,000 miles ago.

The symtom is that on the first start of the day, or after sitting for a few hours, it starts and then dies. It will do this repeatedly.

If I cycle the key (without starting it) several times then it will start and idle no problems. Once it starts/idles the problem is gone until it sits for a few hours, so it seems I'm loosing fuel pressure.

How do I debug without having to remove/check all the 10 injectors?

Thanks!

Oct 16, 2010 | 01:41 PM

jh818

Cargo Master

Joined: Jul 2009

Posts: 2,885

Likes: 26

From: Chino, California

May want to check the IAC valve, too.

Oct 16, 2010 | 07:10 PM

RACERX7775

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Joined: Oct 2005

Posts: 3,620

Likes: 3

From: WARRINGTON, PA

Mine has done the same thing every once in a while ( like once in about every 4 months). I start the engine then it dies. I give it a bit of throttle fo about 10 seconds and then it's fine fo a couple of months. No clue to what it is. Just wanted to let you know you're not alone.