Engine Stumble and buck fix
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Junior User
Joined: Oct 2014
Posts: 52
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From: Dana Point, CA
Engine Stumble and buck fix
I'm sharing this info since it took me years to find the root of my 94 E-250 problems that I am pretty sure also happen to F series regardless of engine. Long story short: Engine stumble while accelerating, no codes, disconnecting the VSS made the problem go away but I lost the speedo and the trans shifted hard (which was way better than putting up with the stumble. I just came across this video about the EEC. I highly recommend that you check your EEC if you have this problem. I changed the capacitors in my EEC and all issues are gone.
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Joined: Aug 2003
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There are many mentions of this in threads here. I have wondered what those capacitors do? Usually when I see a circuit like that I think it is a power supply of sorts. I wonder if it is the source of power for sensors or actuators or just the chips on the board or what?
We see a lot more problems than solutions. Thanks for the post and the link.
We see a lot more problems than solutions. Thanks for the post and the link.
Lead Driver
Joined: Oct 2016
Posts: 6,185
Likes: 633
From: Houston/Sugar Land
There are many mentions of this in threads here. I have wondered what those capacitors do? Usually when I see a circuit like that I think it is a power supply of sorts. I wonder if it is the source of power for sensors or actuators or just the chips on the board or what?
We see a lot more problems than solutions. Thanks for the post and the link.
We see a lot more problems than solutions. Thanks for the post and the link.
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tomph
Pre-Power Stroke Diesel (7.3L IDI & 6.9L)
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Jun 18, 2009 09:01 AM
