Potentiometer mod

[matj1990]

Originally Posted by Begle1

If it's giving you that many problems, you can always put it on a toggle switch.

last resort

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92 d250,5" turn out stack,smoke screw 4 turns,full power screw 3/4 turn,bhaf,boost gauge.....other stack coming soon

[unixcowboy]

Originally Posted by matj1990

when i try it do i stop completly leave it running adjust it try it again ? or do i shut it off start it and do it that way ???

Mine changes on the fly.
You shouldn't have to stop except to keep your hand from jumping around ( after all - these trucks DO ride so smooth )

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'93 D250 CC auto, 18.5cm w/30 psi, 366 spring w/1 turn clipped, power screw bottomed-backed off 1 turn, modified Ol Smokey's power pin, smoke screw fully out, hat modified to get pin higher - still smokes, '94 trans w/clutches and some hard parts, 4510 w/4 1/2" intake and heat shield, grid htrs mia, 4" dp into 5" pipe to single 5" stack, 285's rear 265's front

[matj1990]

Originally Posted by unixcowboy

Mine changes on the fly.
You shouldn't have to stop except to keep your hand from jumping around ( after all - these trucks DO ride so smooth )

oh yea like a dream

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92 d250,5" turn out stack,smoke screw 4 turns,full power screw 3/4 turn,bhaf,boost gauge.....other stack coming soon

[unixcowboy]

Just thought of one other thing ----

You did connect the center wire from the TPS connector to the center terminal on the pot ????
The outside connections don't matter but that CENTER one must remain the center.....

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'93 D250 CC auto, 18.5cm w/30 psi, 366 spring w/1 turn clipped, power screw bottomed-backed off 1 turn, modified Ol Smokey's power pin, smoke screw fully out, hat modified to get pin higher - still smokes, '94 trans w/clutches and some hard parts, 4510 w/4 1/2" intake and heat shield, grid htrs mia, 4" dp into 5" pipe to single 5" stack, 285's rear 265's front

[matj1990]

Originally Posted by unixcowboy

Just thought of one other thing ----

You did connect the center wire from the TPS connector to the center terminal on the pot ????
The outside connections don't matter but that CENTER one must remain the center.....

yes i did also solderd the crimp pins to the wire and heat shrinked every thing exept the tps plug so i dont have to mess around with it also sprayed some electrical cleaner on it to clean the terminals i didnt mount the pot yet i noticed my pot goes from about 8 a clock to 6 o clock turn radius with the connecions at the bottum is this normal ?

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92 d250,5" turn out stack,smoke screw 4 turns,full power screw 3/4 turn,bhaf,boost gauge.....other stack coming soon

[matj1990]

Originally Posted by matj1990

yes i did also solderd the crimp pins to the wire and heat shrinked every thing exept the tps plug so i dont have to mess around with it also sprayed some electrical cleaner on it to clean the terminals i didnt mount the pot yet i noticed my pot goes from about 8 a clock to 6 o clock turn radius with the connecions at the bottum is this normal ?

wich would make my center about 1 a clock

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92 d250,5" turn out stack,smoke screw 4 turns,full power screw 3/4 turn,bhaf,boost gauge.....other stack coming soon

[unixcowboy]

Yes, nearly all have about a 270* - 300* rotation. Find the approximate middle - hold the connections at the bottom and turn the shaft to about 12 o'clock.
That gave me about 35 mph into 3rd and 38 mph shift into OD with light throttle. Then turn it just a little and the OD should kick in later. IF it kicks in about the same, turn the shaft the other way.
1 more thing I just thought of :
IF I turn my shaft the wrong way then try to set CC, the cruise accelerates like it's trying to catch up to the 'accelerate button'....Clear ?
Like you set the CC at 45, tap the brakes, then hit resume. The CC accelerates to 45 again. But if you keep hitting the 'accelerate' button before you reach 45 then the CC will constantly try to catch up.....

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'93 D250 CC auto, 18.5cm w/30 psi, 366 spring w/1 turn clipped, power screw bottomed-backed off 1 turn, modified Ol Smokey's power pin, smoke screw fully out, hat modified to get pin higher - still smokes, '94 trans w/clutches and some hard parts, 4510 w/4 1/2" intake and heat shield, grid htrs mia, 4" dp into 5" pipe to single 5" stack, 285's rear 265's front

[matj1990]

Originally Posted by unixcowboy

Yes, nearly all have about a 270* - 300* rotation. Find the approximate middle - hold the connections at the bottom and turn the shaft to about 12 o'clock.
That gave me about 35 mph into 3rd and 38 mph shift into OD with light throttle. Then turn it just a little and the OD should kick in later. IF it kicks in about the same, turn the shaft the other way.
1 more thing I just thought of :
IF I turn my shaft the wrong way then try to set CC, the cruise accelerates like it's trying to catch up to the 'accelerate button'....Clear ?
Like you set the CC at 45, tap the brakes, then hit resume. The CC accelerates to 45 again. But if you keep hitting the 'accelerate' button before you reach 45 then the CC will constantly try to catch up.....

my cc doesnt work at all since i bought the truck but i never use cc anyway ive had the pot set to 12 for a day now with no diff so ill try slight adjust ments one way or the other and see if it does anyhing if i light foot it i hit 3rd and od at about 25 moderat i hit it about 35 it shifts into 3rd then od instentaniously

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92 d250,5" turn out stack,smoke screw 4 turns,full power screw 3/4 turn,bhaf,boost gauge.....other stack coming soon

[matj1990]

well i cant seem to get it to work right iv tryed putting it in the middle and turn it one way a little bit and then the otherway a little bit and nothing right now where its set if i floor it it goes from first then around 20 it goes hay wire and ends up going into od or so it feels like

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92 d250,5" turn out stack,smoke screw 4 turns,full power screw 3/4 turn,bhaf,boost gauge.....other stack coming soon

[Begle1]

Well darn, must be time for a toggle switch then.

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1990 D-250 Regular Cab: Full power screw; stout TC and A518 w/ manual valve body; ratchet shifter; piston LP; Ramcharger tank; manual off; computer-programmable 40 GPH water/meth fumigation; gauges

[Greenleaf]

I didn't read through all this but I'll ask.........

Do you know that the TV and TV control cable is operating properly and properly adjusted?

I couldn't stands it no more and had to change the thread title....... It's all good.

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1990 D250/1992 D250 Modified by **Smokehouse Diesel** Ashland, OH

....therefore, my brothers, I want you to know that through Jesus the forgiveness of sins is proclaimed to you. Acts 13:38

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Last edited by Greenleaf : 08-27-2008 at 05:57 AM.

[matj1990]

Originally Posted by Greenleaf

I didn't read through all this but I'll ask.........

Do you know that the TV and TV control cable is operating properly and properly adjusted?

I couldn't stands it no more and had to change the thread title....... It's all good.

no i dont no what that is tryed adjusting it again on the way to work still no difference

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92 d250,5" turn out stack,smoke screw 4 turns,full power screw 3/4 turn,bhaf,boost gauge.....other stack coming soon