Vacuum leak. ... also try cleaning the EGR valve.
In the throttle body.
As far as I know the only road speed governor would be an aftermarker unit. It can be removed but you would have to know what you're doing. The ones I've seen take the thottle cable off the thottle body and run it to the aftermarket unit. Then a new cable from the unit back to the thottle body. I guess you could hook the original cable back to the thottle body and "by-pass" the unit. Rich
Irk but it feels like it at half thottle
It is not adjustable...... It has been pre set at the factory.
The tube must be pinched or bent.
The MAPP sensor is located on the passengers side of the thottle body. Remove the "dog box" and when looking from the inside of the vehicle you should see it on the right side of the thottle body. It's kinda tricky to remove ...but it is do-able. Good Luck ... hope this helps. MR. X
right in front of the thermostat on the bottom rad hose beside the thottle body
If the vehicle is in neutral or park and it doesn't rev over half throttle, it is the rev limiter (governor). That is normal.
On the V6 acc. just connected under the thottle body.
Does it have a choke? get it fixed.
lookin at engine from the front it is located to the right above the valve cover close to the thottle body. has a wire and vacume hoses on it
have them check the codes , but prob will be the throttle position sensor is out of whack.