93 f150 4.9 efi the death of me truck

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Old 03-10-2024, 09:34 AM
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93 f150 4.9 efi the death of me truck

had this truck few weeks now had been sitting since 2019 was parked p.o had a stroke. so I've put new tank,pump,injectors.distributer,wires,cap,rotor,pl ugs.m.a.p is new e.g.r is to coolant temp is new.but it is still shoving to much fuel into cylinder #1-#3-#6 I've had several mechanics looking at it to and everyone is stumped I've dug through all wiring and fuses even replacing the i.c.m with no change in anything that I've done



 
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Old 03-11-2024, 08:37 AM
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Welcome to FTE

What codes dose it have?
How do you know it is too much fuel and not a no spark issue if the plug are wet?
Are they wet or?
What is the fuel PSI and is the vacuum hose wet when pulled off the FPR?
How do you know it is just 1 / 3 / 6 and not the others as well?
What if you put them spark plugs in 2 / 4 / 5 and see what happens did the issue follow the plugs or stay in the same hole?
Do the same with the plug wires also.
Today's new parts may not be any good out of the box so if you were throwing parts at it you could have added more issues.
I would also like to know what the compression is on the motor.

Sorry for all the questions but they are needed to pin point where to look deeper.
Dave ----
 
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Old 03-21-2024, 09:11 PM
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Originally Posted by FuzzFace2
Welcome to FTE

What codes dose it have?
How do you know it is too much fuel and not a no spark issue if the plug are wet?
Are they wet or?
What is the fuel PSI and is the vacuum hose wet when pulled off the FPR?
How do you know it is just 1 / 3 / 6 and not the others as well?
What if you put them spark plugs in 2 / 4 / 5 and see what happens did the issue follow the plugs or stay in the same hole?
Do the same with the plug wires also.
Today's new parts may not be any good out of the box so if you were throwing parts at it you could have added more issues.
I would also like to know what the compression is on the motor.

Sorry for all the questions but they are needed to pin point where to look deeper.
Dave ----
I recently found several bent push rods now fuel problem is solved
 
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Old 03-22-2024, 08:09 PM
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Thanks for the feed back on the cause and fix as some do not reply back.

Now why did they bend is the question?
Do you know if the motor was run on the 2019 fuel?
They say old fuel can make valves stick and if stuck closed and the cam turns to try and open bent push rod.
If stuck open it should not hit the piston so no worry there.
Dave ----
 
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Old 03-23-2024, 10:04 AM
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If the valve sticks open - a possible cause - then the pushrod can fall out of the rocker cup and bend up the pushrod if you crank the engine over.
 
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Old 03-30-2024, 07:06 PM
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Originally Posted by The Frenchtown Flyer
If the valve sticks open - a possible cause - then the pushrod can fall out of the rocker cup and bend up the pushrod if you crank the engine over.
well now it has a massive cut out to it so I'm gonna check fuel and see where pressure is at yet again
 
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Old 03-30-2024, 07:09 PM
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Originally Posted by FuzzFace2
Thanks for the feed back on the cause and fix as some do not reply back.

Now why did they bend is the question?
Do you know if the motor was run on the 2019 fuel?
They say old fuel can make valves stick and if stuck closed and the cam turns to try and open bent push rod.
If stuck open it should not hit the piston so no worry there.
Dave ----
when I did push rods I cycled the motor over several times and watched the valves opening it all seemed good but still gonna do compression test as well as fuel pressure
 
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Old 04-02-2024, 07:59 AM
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Originally Posted by 92leroy
well now it has a massive cut out to it so I'm gonna check fuel and see where pressure is at yet again
When you say "massive cut out" what dose it do?
Like someone turned the key off or like runs out of gas?

If just shuts off like a key I would look at the ICM.
Being a 95 and EFI the dist. runs a TFI or is it bolted to the inner fender as they did move it?
Even new they could be bad out of the box. Dont buy the cheapest one do drop a few bucks on it just like the starter solenoid.
Dave ----
 
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Old 04-03-2024, 07:27 AM
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I agree with the previous post about the TFI Module mounted on the distributor. You might want to move it to a fender well where it will not be subjected to the component killing heat! This is a well documented fix that can be done as a DIY or with a kit designed to do the job. Do a search for "Ford TFI remote mount". I did this on my 302 and it cured the issue.
 
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