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Old 08-28-2012, 08:38 PM   #1
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Throttle Control

Been looking for something and not had much luck. What I am seeking is an old fashioned "throttle control". Back in the day, '50's and earlier, vehicles came with a pull out throttle control, which held the throttle at a constant position. Engine received the same amount of fuel, regardless of load. You would slow down under load and speed up under reduced load.

I drive my RV similar to this. Trying to hold constant peddle pressure when going up and down hills. I slow down going up and speed up some going down. All the while trying to give engine, constant fuel flow.

Cruise control just does not work well under these conditions. It works great on flat road, but very aggravating on hills.

I if had an electronic throttle control, I would be in heaven.

Anyone seen anything like this?
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Old 08-28-2012, 08:54 PM   #2
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the cable throttle control wouldn't work on your MH if its a 2012. The throttle is controled by the computer not a cable. I think pull choke cable might work if you had a early 90's carborated engine though.
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Old 08-28-2012, 09:07 PM   #3
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I am no mechanic by any means, but what is the gas peddle controlling?
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Old 08-29-2012, 06:05 AM   #4
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It's a pedal, not peddle

And it is only connected to the engine computer by a wire. A signal is sent to the engine computer by moving the pedal; which then signals the fuel injectors to provide more or less fuel. The common term is "Drive by wire"

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I am no mechanic by any means, but what is the gas peddle controlling?
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Old 08-29-2012, 07:49 AM   #5
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Isn't technology great.In most cases it won't let you over rev the engine or go over 85mph.
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Old 08-29-2012, 12:01 PM   #6
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Quote:
Originally Posted by awwall View Post
I am no mechanic by any means, but what is the gas peddle controlling?
What is the pedal controling? A Rheostat (One of the many names for a variable resistor).

That's all, it controls a variable resistor, This tells a computer "I wish to slow/maintain/speed up, and the computer does the rest.

To use an old fashion cable operated Throttle control you need to make a couple mechanical changes, all simple.

First you need the throttle cable, it MUST have adjustable tension on the knob end of the cable. You will need a short ball chain or other "Tangle proof" chain. And a pully or other attachment method.

Hook one end of the chain to the bottom of the pedal arm (not the pedal but the arm it's attached to, the pivot point for the pedal pad) the other end of the chain goes to the cable center wire.

The hard part is adjusting the cable/chain length

There are better designs but I'd need to have eyes on your system to do one of those .
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Old 08-29-2012, 03:34 PM   #7
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You'll have to find the voltage-resistance figures for a cable free, throttle by wire system. Wire in a rheostat/potentimeter, over ridding the OEM system. Possibly available in a shop/service manual. Google searches might help. Then think safety first. How do you turn it off in a emergency stop. A relay to the stop light switch?
I would get a Scan Gauge II and watch the TPS (Throttle position sensor). I can use a cable on my unit, but in light traffic I use the TPS and get almost as good mileage, sometimes better, I get 9.5 mpg, using your technique. I'm near Chicago and gas is $4.25 here!!!
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Old 08-29-2012, 08:02 PM   #8
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Quote:
Originally Posted by awwall View Post
Been looking for something and not had much luck. What I am seeking is an old fashioned "throttle control". Back in the day, '50's and earlier, vehicles came with a pull out throttle control, which held the throttle at a constant position. Engine received the same amount of fuel, regardless of load. You would slow down under load and speed up under reduced load.

I drive my RV similar to this. Trying to hold constant peddle pressure when going up and down hills. I slow down going up and speed up some going down. All the while trying to give engine, constant fuel flow.

Cruise control just does not work well under these conditions. It works great on flat road, but very aggravating on hills.

I if had an electronic throttle control, I would be in heaven.

Anyone seen anything like this?
Get a scanguage D and you can monitor your throttle position. At least you could see that you are maintaining the same throttle position. I am afraid that any other solution would probably void the warranty on your new motorhome.
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Old 08-29-2012, 09:45 PM   #9
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Thanks for all the replies and suggestions. Looks like modern tech has done my idea in. Guess the foot will have to do the work. You would think they would make that part of a cruise control. Have it control throttle position instead of speed.

Wishful thinking.
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Old 08-29-2012, 10:24 PM   #10
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I remember that from the JC Whitney catalog from many years back described as the poor man's cruise control.
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Old 08-29-2012, 10:27 PM   #11
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I remember that from the JC Whitney catalog from many years back described as the poor man's cruise control.

nope that is a cut off broomstick and rubber tip
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Old 08-30-2012, 12:11 PM   #12
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