My 190D and I were going for a spin when the throttle went to wide open at a red light. My foot was on the brake when she did this. I've checked The shop manual and it makes mention of a Idle speed increase actuator. I could understand burping the throttle to prevent stalling but this thing floors it. (It started spinning the right rear a lil'. I got a bit misty eyed). Any ideas on where to go from here.


Thanks
WG

Just bumping

First thing is disconnect the cruse control linkage. I believe that is the only thing that can cause that much difference.

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84 500 SEL (307,xxx miles)

The cruise is/was disconnected. I'm studying the IP controls/specs to see what would cause this. there is not any binding in the linkage. It's happening within the IP.

I thought I read something last night about a bad voltage regulator can cause that. Something about wild & uncontrolled idle changes.

-Jim

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1995 S350D, Green with black leather interior.
Bought January 2008 w/ 233,xxx miles.
I did 22,000 miles during the first year of ownership.

Run away diesel, why does it happen?

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John HAUL AWAY, OR CRUSHED CARS!!! HELP ME keep the cars out of the crusher! A/C Thread
"as I ride with my a/c on... I have fond memories of sweaty oily saturdays and spewing R12 into the air. THANKS for all you do!

My drivers:
1987 190D 2.5Turbo
1987 190D 2.5Turbo
1987 190D 2.5-5SPEED!!!

1987 300TD
1987 300TD
1994GMC 2500 6.5Turbo truck... I had to put the ladder somewhere!

OK, I just went to the garage and started it up. It idled fine for a few and I watched the throttle lever on the IP slowly bump the idle up. I shut it down at 2500 rpm's. Does anyone have a decent exploded view of these IPs or a setting spec sheet?

How are the return springs on the linkage? I've seen weak springs do that as well, since they could not hold back the force of the intake air. This was on a gasser with a carb. The air flow would open the butterfly, which is connected to the accellerator pump, which is connected to the throttle linkage. Also had a Ford LTD whose throttle control electonics were flaky, and resulted in self accelration. Not a good thing while in a school zone !

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RRGrassi


70's Southern Pacific #5608 Fairmont A-4 MOW car

13 VW JSW 2.0 TDI 193K, Tuned with DPF and EGR Delete.

91 W124 300D Turbo replaced, Pressure W/G actuator installed. 210K

90 Dodge D250 5.9 Cummins/5 speed. 400K

The springs are fine and the linkage is fine. Im going to study this thing to death and see where I can get with it.