5.4 E-150 mis-fire problem?
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New User
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From: Joplin, MO.
5.4 E-150 mis-fire problem?
Have an '01 E-150 5.4L.
Six months ago got a CEL that indicated mis-fire on #4 and bank 1 running rich. Engine had rough idle, erratic stumble on accelleration.
A (former Ford) Mechanic replaced coil (with Accell coil) and upstream bank 1 sensor.
After 4 days, CEL again indicated mis-fire on #4 and bank 1 rich. Same running symptoms. Mechanic could not identify problem, cleared CEL.
Took to another mechanic when CEL lit again after 1500 mi. R/R #2 coil.
CEL on again after indicating #4 mis-fire and rich, and was reset several times during next 1800 mi. I checked #4 plug which no one had thought to replace and it was shot. R/R plug and ran fine for 3 days, then CEL back.
R/R #4 coil (again), cleared codes and after 4 days....guess what!
#4 mis-fire and running rich bank 1. Engine still has rough idle and stumbles on slight accelleration. Seems to be ok at speed, but not at lower speed.
Any suggestions before I spend big bucks (am unemployed)?
Six months ago got a CEL that indicated mis-fire on #4 and bank 1 running rich. Engine had rough idle, erratic stumble on accelleration.
A (former Ford) Mechanic replaced coil (with Accell coil) and upstream bank 1 sensor.
After 4 days, CEL again indicated mis-fire on #4 and bank 1 rich. Same running symptoms. Mechanic could not identify problem, cleared CEL.
Took to another mechanic when CEL lit again after 1500 mi. R/R #2 coil.
CEL on again after indicating #4 mis-fire and rich, and was reset several times during next 1800 mi. I checked #4 plug which no one had thought to replace and it was shot. R/R plug and ran fine for 3 days, then CEL back.
R/R #4 coil (again), cleared codes and after 4 days....guess what!
#4 mis-fire and running rich bank 1. Engine still has rough idle and stumbles on slight accelleration. Seems to be ok at speed, but not at lower speed.
Any suggestions before I spend big bucks (am unemployed)?
Postmaster
Joined: Jan 2009
Posts: 4,584
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From: Chesapeake, Va.
Go to a bone yard and get 1 injector from one of their parts trucks. Make sure the electical connector and color of the injector are the same as the one you are replacing. It sound like a bad injector. There is a Pick N Pull in K.C., Mo. and if you can get there the injectors will be cheap.
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New User
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From: Joplin, MO.
Reply to Mel re. #4 mis-fire
Mel,
Thanks for the reply. I had several people tell me that the code for running rich-bank one would not have triggered if the injector was plugged. I was also told that the injectors for that bank were in a one-piece tube, not individual injectors.
I will be taking it to Ford on Monday for their best guess. Seems symptoms point to a dirty MAF sensor. Maybe their tester will be able to narrow-down the possibilities.
Thanks,
Ron
Thanks for the reply. I had several people tell me that the code for running rich-bank one would not have triggered if the injector was plugged. I was also told that the injectors for that bank were in a one-piece tube, not individual injectors.
I will be taking it to Ford on Monday for their best guess. Seems symptoms point to a dirty MAF sensor. Maybe their tester will be able to narrow-down the possibilities.
Thanks,
Ron
Postmaster
Joined: Jan 2009
Posts: 4,584
Likes: 3
From: Chesapeake, Va.
Mel,
Thanks for the reply. I had several people tell me that the code for running rich-bank one would not have triggered if the injector was plugged. I was also told that the injectors for that bank were in a one-piece tube, not individual injectors.
I will be taking it to Ford on Monday for their best guess. Seems symptoms point to a dirty MAF sensor. Maybe their tester will be able to narrow-down the possibilities.
Thanks,
Ron
Thanks for the reply. I had several people tell me that the code for running rich-bank one would not have triggered if the injector was plugged. I was also told that the injectors for that bank were in a one-piece tube, not individual injectors.
I will be taking it to Ford on Monday for their best guess. Seems symptoms point to a dirty MAF sensor. Maybe their tester will be able to narrow-down the possibilities.
Thanks,
Ron
There is 1 injector per cylinder and each is supplied by the fuel rail that connects to all of the injectors on each side. The fuel rail lifts off of the injectors, with a little effort, and then you can remove the faulty one for testing or replacement.
I think there may be a small piece of dirt or other contaminant keeping the injector from closing completely and allowing a constant flow of fuel to that cylinder. Replacing that 1 injector may solve your problem.
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New User
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From: Joplin, MO.
Reply to Mel re injector
Mel,
That makes sense to me. I have had others suggest that but I thought the whole fuel injector assembly had to be removed, and in an E-150 van, that would be expensive. At least the #4 plug is the easiest to get to. Think I should try some Seafoam first? Otherwise, what should I expect to pay a mechanic to clean (or replace) the injector?
Thanks,
Ron
That makes sense to me. I have had others suggest that but I thought the whole fuel injector assembly had to be removed, and in an E-150 van, that would be expensive. At least the #4 plug is the easiest to get to. Think I should try some Seafoam first? Otherwise, what should I expect to pay a mechanic to clean (or replace) the injector?
Thanks,
Ron
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