Heating up and stalling out
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Joined: Feb 2014
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Heating up and stalling out
Hey Guy I need help,
I have a 89 Ford F-250 w/ 4.9L. It will drive and idle fine until it heats up. Once it heats up it starts sputtering, back firing, stalling out and not wanting to start until it cools back off. I've replaced the fuel pumps, fuel filter, fuel pressure regulator, redid the wiring harness, engine coolant thermostat, throttle position sensor, air charge temperature sensor, and the main computer. Now I'm stuck. Anything can help.
I have a 89 Ford F-250 w/ 4.9L. It will drive and idle fine until it heats up. Once it heats up it starts sputtering, back firing, stalling out and not wanting to start until it cools back off. I've replaced the fuel pumps, fuel filter, fuel pressure regulator, redid the wiring harness, engine coolant thermostat, throttle position sensor, air charge temperature sensor, and the main computer. Now I'm stuck. Anything can help.
Posting Guru
Joined: Jun 2003
Posts: 2,314
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From: southwest michigan
Kinda sounds like what our Farmall Super A is doing right now. I just ordered a coil to put on it because they are known to quit functioning right and not start once they get hot if the coil goes.
My suggestion is coil. But if you can do like Conanski says and check for codes and fuel pressure, you'll save yourself some money rather than just throwing parts at it like I'm suggesting
My suggestion is coil. But if you can do like Conanski says and check for codes and fuel pressure, you'll save yourself some money rather than just throwing parts at it like I'm suggesting
Fleet Owner
Joined: Oct 2005
Posts: 20,786
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From: Kentucky
Please list the KOEO and CM codes by number and in which tests they were displayed.
It looks like you have a repeatable issue so as suggested before check the fuel pressure when the truck runs and when it quits then do the same for spark. Obviously it's a process of elimination so start with the basics first.
Fleet Owner
Joined: Oct 2005
Posts: 20,786
Likes: 1,751
From: Kentucky
It could be the evil republicans withholding oxygen from the atmosphere too that's why I suggested the OP verify what part of the oxygen, fuel, spark equation is missing.
I agree with you if the OP finds spark is dropping out
I agree with you if the OP finds spark is dropping out
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Those look like Key On Engine Running code descriptions. You will be better off running the Key On Engine Off (KOEO) tests and Continuous Memory (CM aka historical) display.
Please list the KOEO and CM codes by number and in which tests they were displayed.
It looks like you have a repeatable issue so as suggested before check the fuel pressure when the truck runs and when it quits then do the same for spark. Obviously it's a process of elimination so start with the basics first.
Please list the KOEO and CM codes by number and in which tests they were displayed.
It looks like you have a repeatable issue so as suggested before check the fuel pressure when the truck runs and when it quits then do the same for spark. Obviously it's a process of elimination so start with the basics first.
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He forgot to pay his taxes on the o2... I didn't think of that.
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