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throttle body questions


backporch

Member
Joined
Dec 31, 2017
Messages
172
Reaction score
9
Points
18
Location
NJ
Vehicle Year
1999
Make / Model
Ranger Off Road
Engine Type
4.0 V6
Transmission
Manual
2WD / 4WD
4WD
Tire Size
245 75R16
I have two throttle bodies that I can choose from.

A lower mileage explorer that had a lot of corrosion and the springs look frail. My higher mileage Ranger engine that has one strange issue. The throttle is a little sticky when closed. There is a pin to limit the travel when closing and when the butterfly valve is closed, there is a gap. It seems like that limit "screw" should be adjustable, but doesn't appear to be a screw??

Is it possible to adjust this and can anyone suggest a lube or rust-proofing for the throttle coil springs?
 
Last edited:


backporch

Member
Joined
Dec 31, 2017
Messages
172
Reaction score
9
Points
18
Location
NJ
Vehicle Year
1999
Make / Model
Ranger Off Road
Engine Type
4.0 V6
Transmission
Manual
2WD / 4WD
4WD
Tire Size
245 75R16
On closer inspection, in much better light, that is an adjustment screw with a 5 or 5.5 mm head and very fine threads covered in rust. The gap between the throttle body and the linkage is the same on both but the position of the screws are very different.

I sprayed penetrant on the screw last night and will adjust that screw until it leaves the throttle body open a hair. I have also read that silicone spray is a good lube and will prevent corrosion, but can be dangerous by electronics, so must be controlled. WD40 is also an option. It seems to be more common to leave them dry, but I would like to hold off any more corrosion if possible.
 

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