5.8 help
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5.8 help
i have a 92 f250 with the 5.8 efi motor and im having some issues i cant figure out. the truck seems to run good for a short distance about 1-2 miles, but once it is at operating temp and i keep driving the oil pressure gauge drops to nothing and motor starts to act up. the things i notice are lack of power, rough idle/slow acceleration, popping through the exhaust, and sputtering. any ideas?? thanks in advance!
Lead Driver
Joined: May 2009
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From: Tobyhanma, PA
Check the codes. You don't wanna guess and jsut start throwing parts at it.
Fuel Injection Technical Library » How To Run a Self-Test
Fuel Injection Technical Library » How To Run a Self-Test
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Joined: Jan 2012
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When this happened on my '92 F250 5.8L, it was a hot summer day. Took me a few minutes of driving with no power to try switching fuel tanks (mine has two). Once I switched to the other tank (sry, don't remember front or rear), the engine took off like a bat outta hell! I never fixed the issue with the tanks, and sometimes I can drive on the one that failed just fine.
Fleet Owner
Joined: Oct 2005
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From: Kentucky
The factory oil pressure "gauge" is well known to be very inaccurate. The only way to verify the true oil pressure is to put a mechanical gauge on it. That noise could be from no oil making it to the important parts of the engine. Let's hope there is another cause of your noise/power loss....
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From: Northern California
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Lead Driver
Joined: May 2009
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From: Tobyhanma, PA
Ford sued him so its old fuel injection now.
Fuel Injection Technical Library » How To Run a Self-Test
Fuel Injection Technical Library » How To Run a Self-Test
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i got the codes 33, 16, 34, 63
16-idm signal not receied
33-egr valve opening not detected
34-pfe or evp circuit above the closed limit of 0.67 volts
63-tps circuit below minimum 0.6 volts
could this cause my problem im having?
16-idm signal not receied
33-egr valve opening not detected
34-pfe or evp circuit above the closed limit of 0.67 volts
63-tps circuit below minimum 0.6 volts
could this cause my problem im having?
Elder User
Joined: Dec 2003
Posts: 660
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From: Northern California
You have some circuits that appear to be failing/failed miserably.
I'd go as far as saying at this point you have a pretty severe wiring harness problem, or your computer has gone awry. Your oil pressure guage (nortorious for being inaccurate) dropping to zero confirms that something (not good) electronic is happening when your truck goes into open loop.
I've posted a link numerous times about ECU's (computers) failing due to age.
However, I'm at home right now and can't find it on this computer to provide you the link.
edit: Found the link
Click here:A9x ECM's (and same years ECM's) Failures Due to Age
Because I see so many different unrelated things happening, In my opinion, I'd suggest pulling the computer from your truck and opening it up as a first step.
Others might disagree, but, dang you got alot of things failing.......
That's just my take.
Good Luck,
Bob
Fleet Owner
Joined: Oct 2005
Posts: 20,786
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From: Kentucky
Did you count flashes or use a digital code reader?
T-Bob has a good point, these trucks are getting pretty old, it is getting to be SOP to check for codes and inspect the PCM for signs of internal failure these days.
