Truck Not Starting
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Truck Not Starting
When I try to start my truck, it doesn't start. Sometimes it almost starts
To try and fix it, I changed the glow plugs, the 2 relays and both batteries with new ones. I also changed the oil and Fuel filter
Can someone diagnose what's wrong with my truck? It's a Ford F450 7.3L Diesel
Thanks.
To try and fix it, I changed the glow plugs, the 2 relays and both batteries with new ones. I also changed the oil and Fuel filter
Can someone diagnose what's wrong with my truck? It's a Ford F450 7.3L Diesel
Thanks.
Post Fiend
Joined: Mar 2007
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From: Texas
How many miles are on the motor? Does it have a chip or tuner on it? What year is the truck? Do you get any smoke coming out the tailpipe while cranking? If so, what color smoke? Does the tach move while cranking? Does the wait to start light come on and then go off after a few seconds like normal? Do all the dash lights act normal? Does it start better if you plug it in for a few hours first?
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220,000km / 136,000miles
Year is 2001
No chip or tuner, the truck is stock
Yes, smoke comes out when I crank. It smells like Diesel.
The smoke color is white
The tachometer does not move when I crank
The wait to start light turns off after a few seconds
The dash lights are all normal
Plugging the truck in used to work, but doesn't anymore.
Year is 2001
No chip or tuner, the truck is stock
Yes, smoke comes out when I crank. It smells like Diesel.
The smoke color is white
The tachometer does not move when I crank
The wait to start light turns off after a few seconds
The dash lights are all normal
Plugging the truck in used to work, but doesn't anymore.
Post Fiend
Joined: Mar 2007
Posts: 26,966
Likes: 50
From: Texas
What brand of glow plugs did you install? (please don't say autolite)
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Sounds like there may be more than one thing going on here. Let's start by testing the new glow plug relay you installed. Take a volt meter and test both large posts on the glow plug relay. With the key off, you'll see one has 12 volts and the other is dead. Put the meter on the dead large plug and turn the key on. If the engine is cold, you should see just under 12 volts on that 2nd large plug for a few seconds up to 2 minutes. If the relay never powers up the 2nd large post, you either have a bad relay or you're not getting the ground signal to activate the relay.
What brand of glow plugs did you install? (please don't say autolite)
What brand of glow plugs did you install? (please don't say autolite)
I'll try checking the volts on the relay tomorrow
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Post Fiend
Joined: Mar 2007
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From: Texas
As autolite glow plugs age, they have a tendency for the tips to swell up. That means when removing them down the road, there's an increased chance that at least one tip will break off in the head. You don't have to change them right away, but I would think about changing them before they get a chance to get old on you.
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Post Fiend
Joined: May 2009
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From: Pea Ridge, AR
Do you have access to any kind of diagnostic scanner? I would start wanting to do a Buzz test. Even though you have low mileage I'm leaning towards some worn injectors possibly.
Have you tried letting the GP's warm for more than one cycle? Seeing if that will help.
Have you tried letting the GP's warm for more than one cycle? Seeing if that will help.
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Yeah 3 cycles
Cargo Master
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We had one last week that was acting like u said....new GPR, good glow plugs, etc.....Turned out the starter was drawing 400 amps. New starter and all is good. Probably not your issue but might be worth checking.
You make take an ohm meter and check resistance on your block heater cord. Might have burned up the element which is why it does not work anymore.
You make take an ohm meter and check resistance on your block heater cord. Might have burned up the element which is why it does not work anymore.
Post Fiend
Joined: Mar 2007
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From: Texas
I like the idea of checking voltage while cranking and checking the block heater cord. As mentioned, access to a good scanner would help, but since you probably don't have that, try unplugging the ICP sensor and see if it starts better after you watch voltage while cranking and check the heater.
The next step after that may be to pull the valve covers and watch for oil discharge while cranking from each of the injectors. You may have several that are not firing.
The next step after that may be to pull the valve covers and watch for oil discharge while cranking from each of the injectors. You may have several that are not firing.