HELP possible trans issues!
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Junior User
Joined: Jan 2021
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HELP possible trans issues!
Hello, im a fairly new owner of this van, its a 2002 E350 superduty with the 5.4 L and the 4r100 auto transmission. Its doing something weird when at about 60 percent throttle, it feels like power going in and out, almost like the torque convrter is slipping in and out BUT rpms did NOT go up and it felt like it was bogging in and out, Zero engine codes or misfire (this van always throws codes when misfiring, trust me i know). I cant get it to happen every time but it almost feels like when you are in wayyyyy too high of a gear (lurching back and forth, BUT happens above 35 or so) When it starts doing this, if i let out of throttle and go back in it starts working fine.
ANy ideas??? I just bought this and all my money is in it. Thanks. Please respond quickly because its worrying me and im thinking about just selling as is at a loss.
It was below the part on the gas gauge where is says to refuel (not the low fuel light) maybe it was a pump issue?
ANy ideas??? I just bought this and all my money is in it. Thanks. Please respond quickly because its worrying me and im thinking about just selling as is at a loss.
It was below the part on the gas gauge where is says to refuel (not the low fuel light) maybe it was a pump issue?
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thanks, im attempting to do a fuel pressure test, i hooked the adapter to the valve on the fuel rail and hooked it to my tester. When turning the key to ON i hear what sounds like the fuel pump but i have exactly 0 PSI. The van runs. Am i forgetting something here?
Edit, when removing the fitting there is fuel in it.
Edit, when removing the fitting there is fuel in it.
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Junior User
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Junior User
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It definitely has full pressure. I can't get MPH over 60 it starts shaking and stuttering. It has low power on Acceleration and about half throttle. this wouldn't be an issue if I had engine codes. It has zero codes. I drove it about 40 miles and nothing for codes. I do notice a possible exhaust leak where the header connects to the exhaust pipe right next to the trans. It almost seems like it's down 4 cylinders when it happens. Would this cause such a severe misfire?
FTE Legend
Joined: Jun 2006
Posts: 31,930
Likes: 1,499
From: Ottawa, Ontario
Low fuel pressure would limit engine power. Try testing fuel pressure with a simple tire gauge, a little messy perhaps but it would confirm the other gauge isn't faulty. You could also connect the fuel pressure gauge to a tire to verify it's function and accuracy.
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i made another thread for this issue because i originally thoughjt it was trans, but fuel pressure shot up above 45 with key on ( the fuel shot everywhere too!)
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New filter, 4 new plugs 2 new cops. Im 1000% positive there are no codes, which is what has me stumped. That scanner i have is a decent one and it helped me repair this van when i first bought it about 1 month ago. I thought TPS too but that would throw code
Laughing Gas
Joined: Oct 2014
Posts: 793
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Im in the same boat, No codes, but different issue.
Have you seen this website, This may help you with diagnosing the problem.
https://easyautodiagnostics.com/ford/main-index
Have you seen this website, This may help you with diagnosing the problem.
https://easyautodiagnostics.com/ford/main-index
Hotshot
Joined: Dec 2012
Posts: 11,278
Likes: 1,658
From: Las Cruces New Mexico
TPS could have a dead spot and not throw codes just FYI but very unlikely in a 5.4 2v. I have a feeling you have a COP going bad that the PCM is not detecting the misfire. Is your scanner equiped with mode 6?
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