i havnt seen that before. can you use the gas pedal or the thumb throttle or just the thumb now? if you installed it on one side could you move it? if so the i would try drivers side then passenger side to see whats better. if not im sorry but your on your own.
i just installed mine. the problem with it on the driver's side is that it rotates the wrong way to be a "thumb" throttle. it would be more of an "index finger" throttle. so i just put it on the passenger side.
if it is installed the way it should be, both the gas pedal and hand throttle are functional. it would be hard to smoothly drive a stick using the hand throttle. i tried in my neighborhood and it didn't go very well.
"Flying is learning how to throw yourself at the ground and miss." - Douglas Adams
You laugh because I'm different. I laugh because I just farted.
"The box said 'Required Windows 95 or better'. So, I installed LINUX."
I will get pics of the connection to the tb(I don't have a carb), but it should still work for you. It will work by itself or with the gas pedal , made no difference here.
I got the thumb throttle from 4x4 toy store, as it is made for a Wrangler, with a stock like cable connection. Easy in, took 1/2 hour.
It seems easier to use on the passenger side, easier to get to...finger wise.
I installed the throttle mostly for my belt driven oba and to rev the engine during winching, but I can see it being useful on trail, as there are times when a manual trans, driver needs 3 feet to opperate all the pedals. Should help on the hiway too. Set it for 2000 rpm and go, go , go(poor mans cruise control )
I have yet to use on trail, the weather went bad here in Colorado, so perhaps next week...
Which side is a personal preference. Thumb throttles are used for constant RPM as in for an onboard welder or for crawling when you just dont have enough feet for all the pedals. The trick to mounting it is to cereate a throttle linkage at the carb that can be defeated by the foot throttle when you climb out and start to use your foot throttle . then you return the thumb throttle back to idle. These are commonly used in places like Moab.
Personally, I like mine on the passenger side. I've had my homebrew hand throttles mounted everywhere from the cage to the dash to my shifter. The shifter seems to be by far the most convenient for the multi-pedally challenged. I've also got one getting ready to go under the hood for the OB Welder.
On a side note, it's not a great idea to use these things as a cruise control. If you want cruise control, that's great, but get a cruise control. In an emergency situation, it's doubtful that your first thought will be to disengage the hand throttle.