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2000 Explorer 5.0 goes limp just after it starts rolling.

Elgatoprerunner

Active Member
Joined
February 6, 2011
Messages
224
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City, State
La Habra, CA
Year, Model & Trim Level
1992 Mazda Navajo Truggy
I just finished the v8 swap into my desert truck. The motor runs great when the truck isn't rolling. When I put it in gear at approximately 2-3 mpg the engine goes into limp mode.
Does anyone know why it's doing this?

2000 5.0 from a awd explorer
Dana 20
Wiring harness cut down and simplified.
ECU reprogrammed pats delete, smog delete, custom tune
No vss


Any help is appreciated.
 




Dono

347 V8 Limited turbo
Elite Explorer
Joined
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City, State
Winnipeg, Manitoba
Year, Model & Trim Level
00 Limited V8
Can you pull the engine codes? No one can say much without knowing the codes causing the limp mode.
 




Elgatoprerunner

Active Member
Joined
February 6, 2011
Messages
224
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City, State
La Habra, CA
Year, Model & Trim Level
1992 Mazda Navajo Truggy
I need my wiring guy to wire me in a obd2 port.
I have no way of reading codes until that happens.
 




Dono

347 V8 Limited turbo
Elite Explorer
Joined
February 18, 2009
Messages
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City, State
Winnipeg, Manitoba
Year, Model & Trim Level
00 Limited V8
Ouch. I really don't know what to say. There are a bunch of threads on what happens with no vss signal, and it looks kind of like it depends what year of pcm you have. Without knowing codes, it's best guess.
 




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