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Dec 12, 2009 | 05:11 PM

97-7.3

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Won't start

I had a previous thread but site said I had exceeded postings on it.

97 7.3 Have had the truck 4 years, only problem was the fuel pump which I replaced about 9 months ago. I have noticed that it has been starting a little slower, not starter slow but a little longer to start.

Yesterday I was hooking up my trailer and the truck started idleing rough but after about 3 or 4 min it cleared up and was idleing normally, ran around all day without any problems. This morning it was 25 deg out, started the truck and it was ideling rough and in about 5 min shut down, I restarted and it ran about 20 sec and shut down.

I replaced the filter and tried to restart ... no start. Normally I hear a humming like a rear pump when I turn the ignition to on but not today, there is not a pump in the rear so I assume it has been the electrical tank switch mounted on the frame by the front tank. I checked the fuse and when using the tank switch in the cab can hear the unit ckick under the truck.

I checked the valley ... it is dry. The fuel bowl only is full about 1/2 now ... before replacing the filter it was full. Any suggestions?

Dec 12, 2009 | 05:20 PM

MADVAN

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From: Levittown

Open the filter again and clean the fuel return screen.
Next would be to check the select valve.

Bill

Dec 12, 2009 | 05:23 PM

97-7.3

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Thanks Bill .... I haven't tried that but will in the A.M in fact didn't know that there was a return screen.

Is it in the fuel canaster?

Last edited by 97-7.3; Dec 12, 2009 at 05:24 PM. Reason: miss info

Dec 12, 2009 | 05:59 PM

MADVAN

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Quote:

Originally Posted by 97-7.3

Is it in the fuel canaster?

Yes.
Its towards the top of the canaster on the regulator side. (drive side).
Dont think its your only issue but it will help the canaster fill with fuel.

Bill

Dec 12, 2009 | 06:04 PM

97-7.3

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Thanks again .... i was just reading a post about the FPR screen, should this be removed perodiacally as well??

Dec 12, 2009 | 06:09 PM

MADVAN

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Quote:

Originally Posted by 97-7.3

Thanks again .... i was just reading a post about the FPR screen, should this be removed perodiacally as well??

Just clean it when you do a filter.

Just saw other tread
Check the transfer valve.

Are both fuel tanks 1/4 or more full?

Bill

Dec 12, 2009 | 06:34 PM

97-7.3

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One tank is full the other almost full. Where is the transfer valve you mentioned. I also noticed that the tach does not move when cranking.

Last edited by 97-7.3; Dec 12, 2009 at 06:50 PM. Reason: add info

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Dec 12, 2009 | 07:28 PM

97-7.3

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Thanks Bill

I tried to saty in the other thread but when I tried to enter in the previous thread the site had an X by the thread with a note in the margin that I had 9 entries and that was the limit so I started a new thread.

Dec 12, 2009 | 09:10 PM

#10

helifixer

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From: Chino Valley, Arizona

Quote:

Originally Posted by 97-7.3

One tank is full the other almost full. Where is the transfer valve you mentioned. I also noticed that the tach does not move when cranking.

if the tach isn't moving you either have a bad cps or bad cps wiring, the truck will not start if the cps is bad, it can't know when to fire the injectors.

Dec 13, 2009 | 07:45 AM

#11

97-7.3

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Where is the cps located on the engine ... don't have a manual.

Dec 13, 2009 | 10:04 AM

#12

DRRXR

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From: Texas Coast

CPS

Quote:

Originally Posted by 97-7.3

Where is the cps located on the engine ... don't have a manual.

Dec 13, 2009 | 06:22 PM

#13

97-7.3

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Thanks for all the help !!!

Replaced the CPS, canaster fuel heater fuse (it blew again .. must be short ) disconnected the canaster wire, replaced the fuse just as the replys to my thread suggested and it started right up.