Idle too high in P/N, too low in D/R
Idle too high in P/N, too low in D/R
11-06-2011, 05:49 PM
#1
When cold, it just stalls if I don't press and hold the accelerator to keep the revs up... In all gears.
When hot, the idle in P and N is a little too high, but I can live with that...
In R, D, 3 and 2, the idle is too low. It starts shaking, and if I turn the steering wheel, it feels like it's going to stall.
Is there any way to adjust the "under load" idle, and cold idle, or do I just have to live with it?
-rolfi
1980 Mercedes-Benz 300D (US-spec)
+BMW E12, E21, E28, E30 and E32
The car finally runs good, again.. Now with some other issues....
When cold, it just stalls if I don't press and hold the accelerator to keep the revs up... In all gears.
When hot, the idle in P and N is a little too high, but I can live with that...
In R, D, 3 and 2, the idle is too low. It starts shaking, and if I turn the steering wheel, it feels like it's going to stall.
Is there any way to adjust the "under load" idle, and cold idle, or do I just have to live with it?
-rolfi
1980 Mercedes-Benz 300D (US-spec)
+BMW E12, E21, E28, E30 and E32
01-03-2012, 05:13 PM
#2
(11-06-2011, 05:49 PM)rolfi Is there any way to adjust the "under load" idle, and cold idle, or do I just have to live with it?
Short answer: sorry, not as far as I know. I had a 300sd with this problem, more prevalent in hot weather. I had to adjust the idle two or three times a year, according to ambient temperatures.
I was told that it's symptomatic of wear in the injection pump governor. If you are brave you can remove the pump and work on that, but as I am not that brave I just lived with it....
However, are you absolutely sure you have no air leaks in your fuel system? In my experience an air leak will magnify this problem a LOT. For example, if you have the old-style primer pump (the that has to be unscrewed to be unlocked), replace that and see if the behaviour improves.
(11-06-2011, 05:49 PM)rolfi Is there any way to adjust the "under load" idle, and cold idle, or do I just have to live with it?
Short answer: sorry, not as far as I know. I had a 300sd with this problem, more prevalent in hot weather. I had to adjust the idle two or three times a year, according to ambient temperatures.
I was told that it's symptomatic of wear in the injection pump governor. If you are brave you can remove the pump and work on that, but as I am not that brave I just lived with it....
However, are you absolutely sure you have no air leaks in your fuel system? In my experience an air leak will magnify this problem a LOT. For example, if you have the old-style primer pump (the that has to be unscrewed to be unlocked), replace that and see if the behaviour improves.
01-03-2012, 09:06 PM
#3
1982 300D Turbo ... 3,6xxlbs, No fan, No AC, Hood Stack, No ALDA, No rear bumper and stuffed front, A/W Intercooled, Injectors by Greezer and HUGE Pre-Chambers with help from OM616 & Simpler=Better, Fuel Cranked up, 60 Trim Compressor wheel, EGT, EMP, Boost 50" Rigid Radius bar on roof Aux tank for a total of 48 Gal Of Diesel! Odyssey PC-1750 Battery in trunk, 27"x8.5"/R14 Maxxis BigHorn Mud Terrains, In June '14 issue of Off Road Mag
AX15 Jeep Trans swap in progress....
Captain America
01-03-2012, 09:06 PM #3A question for OM616....
1982 300D Turbo ... 3,6xxlbs, No fan, No AC, Hood Stack, No ALDA, No rear bumper and stuffed front, A/W Intercooled, Injectors by Greezer and HUGE Pre-Chambers with help from OM616 & Simpler=Better, Fuel Cranked up, 60 Trim Compressor wheel, EGT, EMP, Boost 50" Rigid Radius bar on roof Aux tank for a total of 48 Gal Of Diesel! Odyssey PC-1750 Battery in trunk, 27"x8.5"/R14 Maxxis BigHorn Mud Terrains, In June '14 issue of Off Road Mag
AX15 Jeep Trans swap in progress....
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