Starting Problem 92 f250
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Starting Problem 92 f250
I am having trouble starting my 1992 f250 Have changed glow plugs, compressor pump, batteries, plug wires. etc. etc.!! and everything suggested by several diesel shops with no luck. It will start after plugging in for about 15 minutes instantly. Once started, it will start again all day instantly. Obviously missing something
any ideas????
Thanks for any info. or ideas Mark
any ideas????Thanks for any info. or ideas Mark
Post Fiend
Joined: Nov 2004
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From: Manitoba
Air in the fuel system........fuel drains off and you have to re prime it in the mornings.
How old are the fuel injector return lines....... are they grey in color. after doing that much work on the engine for sure the return lines and caps were disturbed......old ones disturbed leak like sieves........
You could do the clear line test, remove the return line to the filter header at #1 injector and replace it with a clear fuel line with a large pigtail. Do the same from the IP to #2 injector, what your looking for is air after shutdown and which way it is moving. Drive the truck like this for a while at highway speeds to remove any residual air in the system.
Also try the .........
Do a pressure and flow test of the fuel pump at the Schrader valve on the filter header (FSS- fuel shutoff solenoid disconnected on IP). Remove the tire valve core and hook a hose and pressure guage on it should see 4-6 psi when cranking. Then do a fuel quantity test same place, should see 1/3 pint in 10 seconds of engine cranking, route fuel to a suitable container with a hose.
How old are the fuel injector return lines....... are they grey in color. after doing that much work on the engine for sure the return lines and caps were disturbed......old ones disturbed leak like sieves........
You could do the clear line test, remove the return line to the filter header at #1 injector and replace it with a clear fuel line with a large pigtail. Do the same from the IP to #2 injector, what your looking for is air after shutdown and which way it is moving. Drive the truck like this for a while at highway speeds to remove any residual air in the system.
Also try the .........
Do a pressure and flow test of the fuel pump at the Schrader valve on the filter header (FSS- fuel shutoff solenoid disconnected on IP). Remove the tire valve core and hook a hose and pressure guage on it should see 4-6 psi when cranking. Then do a fuel quantity test same place, should see 1/3 pint in 10 seconds of engine cranking, route fuel to a suitable container with a hose.
Fleet Mechanic
Joined: Sep 2005
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From: Ladner, British Columbia
That is a tough one. If she starts right up when you plug her in then it is unlikely to be an air intrusion problem as you would still have starting difficulties.
How old is your starter? Older starters tend to slow down and during cold starting just don't produce enough compression to fire the engine. If you plug the truck in and warm up the motor (or do a warm start) the engine has less resistance and the old starter still gets it started.
I had two friends who both solved their cold starting problems by replacing their aging starters. (Both had about 150,000 miles on their starters)
Hope this helps a little,
Seb....
How old is your starter? Older starters tend to slow down and during cold starting just don't produce enough compression to fire the engine. If you plug the truck in and warm up the motor (or do a warm start) the engine has less resistance and the old starter still gets it started.
I had two friends who both solved their cold starting problems by replacing their aging starters. (Both had about 150,000 miles on their starters)
Hope this helps a little,
Seb....
Elder User
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From: Edmonton, Alberta Canada
You could also have a problem with your glow plug relay. How long does your light come on for? Are you hearing the "clicks" coming from underneath the hood? If you don't hear anything, your GP relay is scrapped and you need to get a new one put on. If this isn't working, it's not sending any current to your glow plugs...therefore, the combustion chambers aren't being heated. And I agree with what Hamberger said about the engine having less resistance to start if it's warm. I too don't think it's an air intrusion problem in your lines. Best thing to do is to get your starter and glow plug relay checked out.
Also, do you use your truck all day? Or are you just doing the typical drive to work in the morning and drive back home at night? If you're running your truck all day, it would make sense that it's easier to start because the engine is still hot from the last time you ran it.
Also, do you use your truck all day? Or are you just doing the typical drive to work in the morning and drive back home at night? If you're running your truck all day, it would make sense that it's easier to start because the engine is still hot from the last time you ran it.
Posting Guru
Joined: Oct 2005
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From: Powell River B.C.
I would concure with the slow starter when cold problem, Mine with about 150K miles was slowing down, difficult to start. As the brushes in the starter wear down to a certain point, the springs no longer can put enough pressure on brush to armature contact for proper current flow. I installed new brushes cleaned it up, and is working like new again.
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Thanks for the info. but I had the relay changed too! The light stays on for about 3 seconds when warm and maybe about 6 to 8 when cold. The starter was checked and OK I agree its not a fuel problem(would do the same hot or cold) It is getting fuel when cranking cause smoke will come out when cranking to long. Thanks again for any other ideas!!
Allmost stumped..........Mark
Allmost stumped..........Mark
Posting Guru
Joined: Sep 2002
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From: Northeastern Pa - USA
see if the starter is pulling lots of power when cranking ... sounds like you have cooked it if you have put it thru long periods of cranking without letting it cool down. The starters are susceptible to damage after cranking too long ... usually 20 seconds and 2 minute cooldown time works.
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Starting Problem????
Originally Posted by Hamberger
That is a tough one. If she starts right up when you plug her in then it is unlikely to be an air intrusion problem as you would still have starting difficulties.
How old is your starter? Older starters tend to slow down and during cold starting just don't produce enough compression to fire the engine. If you plug the truck in and warm up the motor (or do a warm start) the engine has less resistance and the old starter still gets it started.
I had two friends who both solved their cold starting problems by replacing their aging starters. (Both had about 150,000 miles on their starters)
Hope this helps a little,
Seb....
How old is your starter? Older starters tend to slow down and during cold starting just don't produce enough compression to fire the engine. If you plug the truck in and warm up the motor (or do a warm start) the engine has less resistance and the old starter still gets it started.
I had two friends who both solved their cold starting problems by replacing their aging starters. (Both had about 150,000 miles on their starters)
Hope this helps a little,
Seb....
Thanks again Mark
Lead Driver
Joined: Jan 2005
Posts: 7,782
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From: Huntington Indiana
Ok lets re-evaluate what we've got.
first - no start unless plugged in for 15 minutes
second - changed glow plugs, relay
third- getting white smoke
I am wondering if the new relay is bad or doesn't have a good ground. take relay off motor and add a wire from battery (-) to the ground for the relay (this will be the wire going to a bolt which attaches the relay to engine) I've had a bad ground here and wouldn't start.
first - no start unless plugged in for 15 minutes
second - changed glow plugs, relay
third- getting white smoke
I am wondering if the new relay is bad or doesn't have a good ground. take relay off motor and add a wire from battery (-) to the ground for the relay (this will be the wire going to a bolt which attaches the relay to engine) I've had a bad ground here and wouldn't start.
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