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2005 Ford Ranger Won't Go Over 55 MPH


emanheeman

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Denver, Colorado
Vehicle Year
2005
Make / Model
Ford Ranger
Engine Type
4.0 V6
Transmission
Manual
2WD / 4WD
4WD
Have you thrown a new VSS on it yet? They aren't expensive and I'd be inclined to replace it on suspicion alone.
I've unplugged the VSS on the transmission and still had the issue (as well as all the WSS). It seems like none of the speed sensors are the issue to me
 


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Dirtman

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I've unplugged the VSS on the transmission and still had the issue (as well as all the WSS). It seems like none of the speed sensors are the issue to me
The VSS is on the top of the rear differential not the transmission. All vehicle speed input to the ECU and speedometer comes from that one rear sensor. The front speed sensors only input info to the ABS module. The sensors on the transmission are only for shifting/monitoring and have no input on speed.
 

emanheeman

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Location
Denver, Colorado
Vehicle Year
2005
Make / Model
Ford Ranger
Engine Type
4.0 V6
Transmission
Manual
2WD / 4WD
4WD
With the speed sensor unplugged on rear differential I still get a speed reading on the speedometer. When I plug the sensor I believe is the VSS on the transmission I lose any output on the speedometer so I think my VSS is on the transmission.

I think this is overall a very confusing issue. I dropped it off at another shop. They had it for about a week and a half and told me that they think the car was originally an automatic and at some point was converted to a manual but the PCM/TCM and wiring harness were not converted over. I checked the VC label on the drivers side door jam (see attached picture) that indicated it was a manual with the "J" code under TR and that the VIN on the VC label matches the VIN of the car but they said they called and talked to "someone" at ford that told them the car was originally an automatic from the factory. They wanted to replace the PCM/TCM and wiring harness because they thought it was for an automatic. This would cost $2,000+. This seems like BS to me because the VC label would indicate an automatic then or the VIN number would be different indicating the door was replaced. I'm probably going to take it to another shop for another opinion... I think this is really above me

65907
 

vigness

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Location
Princeton, KS
Vehicle Year
2003
Make / Model
Ford Ranger FX4
Engine Type
4.0 V6
Engine Size
4.0
Transmission
Automatic
2WD / 4WD
4WD
I just went through this with my '03. Purge solenoid, fuel filter, PCV valve, none of that helped.

It was really stupid. Cracked, in two places, intake duct and a nasty air filter. When you gave it some throttle, it would literally partially collapse the intake duct until the cracks opened up. That's what I get for getting in the cab and pressing the pedal instead of pulling the plastic cover off the throttle body and rotating it there.

Pop the top off the air filter and leave it sitting up a bit and take it for a short drive. That will tell you if it's an intake restriction.
 


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