Fuel Injectors

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Mar 17, 2009 | 11:18 AM

exporangerman

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Fuel Injectors

I have 2000 expo 5.4 106,500k. how can i teel if my injectors are going bad? what signs can help me. i have another posting about the starting problems under 2000 expo weird starting problems for more info on what my truck is doing. thanks for any ideas

Mar 17, 2009 | 12:19 PM

rubydist

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From: Denver

have you changed plugs and/or coils?

Mar 17, 2009 | 01:14 PM

97ExpGuy

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From: Southern Illinois

I knew my injectors started going bad when at highway speeds I gave it gas and the car had a slight shudder to it - like it was starved for gas or had a spark problem. I thought it was spark because mine has 108,00 on it and has never been changed. However, when I pulled the plugs, they were all fine looking (but replaced anyway). When I pulled the fuel rail, that's when I found 3 of my injectors to be all broken at the tip (where the fuel squirts out).

Mar 17, 2009 | 04:48 PM

exporangerman

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fuel injectors

Quote:

Originally Posted by rubydist

have you changed plugs and/or coils?

Yes i gave it a full tuneup yesterday. I am having weird starting problems. and it does it at random times. it wil not fully start so on 3rd try i have to give it gas to fully start and then it runs and idle's fine while driving.

Mar 17, 2009 | 06:12 PM

cbradford

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From: Lost in Pa.

Have you checked the fuel pressure?

Mar 17, 2009 | 07:37 PM

exporangerman

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No i have'nt how do i check it?

Mar 17, 2009 | 07:52 PM

cbradford

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From: Lost in Pa.

There is a schrader valve with a cap that screws off on the fuel rail, remove the cap and attach a fuel pressure gauge that you can purchase at an auto parts store for about 20 bucks or maybe they will even have a loaner, after installing the gauge turn the key on (not starting) and read the pressure should come up to 30 to 40psi ( not sure what the spec without looking up) then start and see what the running pressure is.