Device to allow keeping throttle just above idle?

[suspectnumber961]

Has anyone designed a simple system where you would add a finely adjustable solenoid at the throttle body to allow keeping the TPS slightly above idle area for use when running at 25-35 mph and for adjusting speed when approaching a stop sign?

This would be controlled by a dashboard switch.

[Daox]

Why would you want to keep your rpms above idle?

[suspectnumber961]

My Focus idles at 16 TPS...when going 25-35 mph... keeping the TPS at 17-18 results in maintaining speed and seeing the best mpg....same as when approaching a stop sign or corner and trying to get to the sign at 25-30-35 mph. Also this would help when going over some hills.

I currently do this manually...but it is difficult.

These kinds of solenoids have been used on various cars that have AC...to up the idle some....

[mwebb]

are you coasting ?
are you in neutral ... or in gear , automatic trans , 5 speed ?

Originally Posted by suspectnumber961

My Focus idles at 16 TPS...when going 25-35 mph... keeping the TPS at 17-18 results in maintaining speed and seeing the best mpg....same as when approaching a stop sign or corner and trying to get to the sign at 25-30-35 mph. Also this would help when going over some hills.

I currently do this manually...but it is difficult.

These kinds of solenoids have been used on various cars that have AC...to up the idle some....

[baldlobo]

not too sure about fords; but gm and chrysler both use iac stepper motor's to control idle rpm. 4 wires normally, 2 to control in and 2 to control out; but you'd probably have to disconnect it some how from the pcm to gain control and the pcm might freak out.

[suspectnumber961]

Auto...in gear.

The solenoid idea would require custom fitting....another idea would be to use a choke cable to insert a thin shim at the throttle stop.

The Scangauge indicates mpg in the low 40s at 25-35 mph....TPS 17-18.

I use a sort of pulse and glide...TPS at 32-37 to go....glide into stops and corners...in gear. The 18 TPS would be used in 25-35 mph areas and to adjust speed for stops and hills.

Originally Posted by mwebb

are you coasting ?
are you in neutral ... or in gear , automatic trans , 5 speed ?

[vskid3]

It sounds like a hand throttle would do the job. Pretty much hook something like a bicycle gear shifter to your throttle, which you can then use as a sort of cruise control for the throttle (pretty much what you're saying you do with your foot but easier to hold at a certain TPS). Some offroading guys like to use them, so that's where I would start looking for info and ideas.

[mwebb]

Originally Posted by suspectnumber961

Auto...in gear.

The solenoid idea would require custom fitting....another idea would be to use a choke cable to insert a thin shim at the throttle stop.

The Scangauge indicates mpg in the low 40s at 25-35 mph....TPS 17-18.

I use a sort of pulse and glide...TPS at 32-37 to go....glide into stops and corners...in gear. The 18 TPS would be used in 25-35 mph areas and to adjust speed for stops and hills.

search for the cruise control setup of MJpies or a similar name , he has used the MAP sensor from a FORD (digital signal )instead of VSS input to regulate engine load / speed

his idea / invention will provide what you seek in a much better way than the way you are chasing