ALDA doesnt kick in when cold
ALDA doesnt kick in when cold
02-09-2011, 11:45 AM
#1
Ideas?
1987 300D Sturmmachine
1991 300D Nearly Perfect
1985 300D Weekend/Camping/Dog car
1974 L508D Motoroam Monarch "NightMare"
OBK #42
My ALDA takes forever to kick in when cold. Like 10-15min of driving. This is on the 87. Have a hard time believing its sticking... But I guess it could be?
Ideas?
1987 300D Sturmmachine
1991 300D Nearly Perfect
1985 300D Weekend/Camping/Dog car
1974 L508D Motoroam Monarch "NightMare"
OBK #42
02-09-2011, 01:30 PM
#2
Likely has EGR goop in it that takes a bit to warm up and de-sludgify.
Or, your shaft seal is possibly leaky?
1990 Power Ram 50 V6 SOHC 24V 6g72
I can be wrong, don't take everything I say as verbatim, please fact-check first.
My posts are my personal opinions and thoughts, unless otherwise noted.
Pop it off, clean it with something rubber-seal friendly.
Likely has EGR goop in it that takes a bit to warm up and de-sludgify.
Or, your shaft seal is possibly leaky?
1990 Power Ram 50 V6 SOHC 24V 6g72
I can be wrong, don't take everything I say as verbatim, please fact-check first.
My posts are my personal opinions and thoughts, unless otherwise noted.
02-10-2011, 11:14 AM
#3
1987 300D Sturmmachine
1991 300D Nearly Perfect
1985 300D Weekend/Camping/Dog car
1974 L508D Motoroam Monarch "NightMare"
OBK #42
Oh that might be an easy fix. I will get a can of brake cleaner and see what comes out of the ALDA. I cant get it off without taking manifold or IP off.
1987 300D Sturmmachine
1991 300D Nearly Perfect
1985 300D Weekend/Camping/Dog car
1974 L508D Motoroam Monarch "NightMare"
OBK #42
02-10-2011, 11:28 AM
#4
1990 Power Ram 50 V6 SOHC 24V 6g72
I can be wrong, don't take everything I say as verbatim, please fact-check first.
My posts are my personal opinions and thoughts, unless otherwise noted.
Be careful with the brake parts cleaner, you don't want to eat the oring or shaft seal.
1990 Power Ram 50 V6 SOHC 24V 6g72
I can be wrong, don't take everything I say as verbatim, please fact-check first.
My posts are my personal opinions and thoughts, unless otherwise noted.
02-10-2011, 11:34 AM
#5
This post was last modified: 02-10-2011, 11:35 AM by winmutt.
1987 300D Sturmmachine
1991 300D Nearly Perfect
1985 300D Weekend/Camping/Dog car
1974 L508D Motoroam Monarch "NightMare"
OBK #42
02-10-2011, 11:35 AM
#6
1990 Power Ram 50 V6 SOHC 24V 6g72
I can be wrong, don't take everything I say as verbatim, please fact-check first.
My posts are my personal opinions and thoughts, unless otherwise noted.
02-10-2011, 09:42 PM
#7
Clean / bypass the switchover valves or the intake grommet.
totaldisaster
02-10-2011, 09:42 PM #7Its not the ALDA.
Clean / bypass the switchover valves or the intake grommet.
02-11-2011, 07:19 AM
#8
1987 300D Sturmmachine
1991 300D Nearly Perfect
1985 300D Weekend/Camping/Dog car
1974 L508D Motoroam Monarch "NightMare"
OBK #42
Its not the switch over valve, bypassed it still happens. Intake grommet? You mean the banjo? This was cleaned when I purchased the car.
1987 300D Sturmmachine
1991 300D Nearly Perfect
1985 300D Weekend/Camping/Dog car
1974 L508D Motoroam Monarch "NightMare"
OBK #42
02-11-2011, 12:25 PM
#9
Could you have a boost leak?
A sticky wastegate / or a dirty valve could be the cause. When it warms up, it seals better?
totaldisaster
02-11-2011, 12:25 PM #9It just doesn't make sense that an ALDA would be 'finnicky'.... if they fail, they fail.
Could you have a boost leak?
A sticky wastegate / or a dirty valve could be the cause. When it warms up, it seals better?
02-11-2011, 02:13 PM
#10
(02-11-2011, 12:25 PM)totaldisaster It just doesn't make sense that an ALDA would be 'finnicky'.... if they fail, they fail.
Could you have a boost leak?
A sticky wastegate / or a dirty valve could be the cause. When it warms up, it seals better?
This could be very true. I did just hook up the wastegate hose for the first time in probably a long time (bought the car this way about a year ago).
1987 300D Sturmmachine
1991 300D Nearly Perfect
1985 300D Weekend/Camping/Dog car
1974 L508D Motoroam Monarch "NightMare"
OBK #42
(02-11-2011, 12:25 PM)totaldisaster It just doesn't make sense that an ALDA would be 'finnicky'.... if they fail, they fail.
Could you have a boost leak?
A sticky wastegate / or a dirty valve could be the cause. When it warms up, it seals better?
This could be very true. I did just hook up the wastegate hose for the first time in probably a long time (bought the car this way about a year ago).
1987 300D Sturmmachine
1991 300D Nearly Perfect
1985 300D Weekend/Camping/Dog car
1974 L508D Motoroam Monarch "NightMare"
OBK #42
02-11-2011, 02:28 PM
#11
(02-11-2011, 02:13 PM)winmutt This could be very true. I did just hook up the wastegate hose for the first time in probably a long time (bought the car this way about a year ago).
You were running with no wastegate?
The "overboost protection system" is supposed to disable ALDA enrichment if the boost is too high, although on my car (if the wastegate is adjusted too high or disconnected) this kicks back and forth causing "bucking" rather than just a steady decrease in power. Still, you could have some sort of electrical issue where those solenoid valves aren't allowing the ALDA to see boost until it's warmed up. If you T a boost gauge right before the ALDA you can see if boost is getting to it or not.
This post was last modified: 02-11-2011, 02:29 PM by casioqv.
-Tyler
1984 Volvo 760GLE Turbo Diesel D24T/M46
1986 Isuzu Trooper Turbo Diesel
No mercedes (for now)
(02-11-2011, 02:13 PM)winmutt This could be very true. I did just hook up the wastegate hose for the first time in probably a long time (bought the car this way about a year ago).
You were running with no wastegate?
The "overboost protection system" is supposed to disable ALDA enrichment if the boost is too high, although on my car (if the wastegate is adjusted too high or disconnected) this kicks back and forth causing "bucking" rather than just a steady decrease in power. Still, you could have some sort of electrical issue where those solenoid valves aren't allowing the ALDA to see boost until it's warmed up. If you T a boost gauge right before the ALDA you can see if boost is getting to it or not.
-Tyler
1984 Volvo 760GLE Turbo Diesel D24T/M46
1986 Isuzu Trooper Turbo Diesel
No mercedes (for now)
02-11-2011, 02:42 PM
#12
(02-11-2011, 02:28 PM)casioqv(02-11-2011, 02:13 PM)winmutt This could be very true. I did just hook up the wastegate hose for the first time in probably a long time (bought the car this way about a year ago).
You were running with no wastegate?
The "overboost protection system" is supposed to disable ALDA enrichment if the boost is too high, although on my car (if the wastegate is adjusted too high or disconnected) this kicks back and forth causing "bucking" rather than just a steady decrease in power. Still, you could have some sort of electrical issue where those solenoid valves aren't allowing the ALDA to see boost until it's warmed up. If you T a boost gauge right before the ALDA you can see if boost is getting to it or not.
When I first got the car, the overboost solenoid was plugged. I replaced it and had more power. Then after I put in the manual transmission I started getting this wierd cyclic up down power thing at WOT, at the time I thought it was filters. Turns out it was the overboost system cycling in and out which I figured out after I saw the WG hose just laying there. As I have bypassed the overboost solenoid, it certainly cant be that causing the issue.
I am not even sure its the ALDA specifically. For all I know it could be the ELR. All I know is that I don't have fuel enrichment for 10-15minutes after start when its really cold outside. It is directly connected to temperature, when warmer or the engine is warm the time is shortened.
1987 300D Sturmmachine
1991 300D Nearly Perfect
1985 300D Weekend/Camping/Dog car
1974 L508D Motoroam Monarch "NightMare"
OBK #42
(02-11-2011, 02:28 PM)casioqv(02-11-2011, 02:13 PM)winmutt This could be very true. I did just hook up the wastegate hose for the first time in probably a long time (bought the car this way about a year ago).
You were running with no wastegate?
The "overboost protection system" is supposed to disable ALDA enrichment if the boost is too high, although on my car (if the wastegate is adjusted too high or disconnected) this kicks back and forth causing "bucking" rather than just a steady decrease in power. Still, you could have some sort of electrical issue where those solenoid valves aren't allowing the ALDA to see boost until it's warmed up. If you T a boost gauge right before the ALDA you can see if boost is getting to it or not.
When I first got the car, the overboost solenoid was plugged. I replaced it and had more power. Then after I put in the manual transmission I started getting this wierd cyclic up down power thing at WOT, at the time I thought it was filters. Turns out it was the overboost system cycling in and out which I figured out after I saw the WG hose just laying there. As I have bypassed the overboost solenoid, it certainly cant be that causing the issue.
I am not even sure its the ALDA specifically. For all I know it could be the ELR. All I know is that I don't have fuel enrichment for 10-15minutes after start when its really cold outside. It is directly connected to temperature, when warmer or the engine is warm the time is shortened.
1987 300D Sturmmachine
1991 300D Nearly Perfect
1985 300D Weekend/Camping/Dog car
1974 L508D Motoroam Monarch "NightMare"
OBK #42
02-11-2011, 02:49 PM
#13
(02-11-2011, 02:42 PM)winmutt I am not even sure its the ALDA specifically. For all I know it could be the ELR. All I know is that I don't have fuel enrichment for 10-15minutes after start when its really cold outside. It is directly connected to temperature, when warmer or the engine is warm the time is shortened.
Interesting... My theory is that it's *somehow* related to the thermostatic system which is supposed to make the automatic transmission shift smoother when cold. It has a temp switch on the engine block, and a solenoid valve which I believe is supposed to keep the "blue flying saucer" from seeing boost (and therefore firming up shifts in response to power) until the engine is warmed up.
Could somehow during your manual swap, this have gotten connected in a weird way so that this system is bleeding off the boost signal to the ALDA until the thermostatic switch kicks in?
Quick test- just unplug the temp switch (by the engine thermostat, above the alternator) and see if you get ALDA enrichment immediately on a cold start.
This post was last modified: 02-11-2011, 02:51 PM by casioqv.
-Tyler
1984 Volvo 760GLE Turbo Diesel D24T/M46
1986 Isuzu Trooper Turbo Diesel
No mercedes (for now)
(02-11-2011, 02:42 PM)winmutt I am not even sure its the ALDA specifically. For all I know it could be the ELR. All I know is that I don't have fuel enrichment for 10-15minutes after start when its really cold outside. It is directly connected to temperature, when warmer or the engine is warm the time is shortened.
Interesting... My theory is that it's *somehow* related to the thermostatic system which is supposed to make the automatic transmission shift smoother when cold. It has a temp switch on the engine block, and a solenoid valve which I believe is supposed to keep the "blue flying saucer" from seeing boost (and therefore firming up shifts in response to power) until the engine is warmed up.
Could somehow during your manual swap, this have gotten connected in a weird way so that this system is bleeding off the boost signal to the ALDA until the thermostatic switch kicks in?
Quick test- just unplug the temp switch (by the engine thermostat, above the alternator) and see if you get ALDA enrichment immediately on a cold start.
-Tyler
1984 Volvo 760GLE Turbo Diesel D24T/M46
1986 Isuzu Trooper Turbo Diesel
No mercedes (for now)
02-11-2011, 08:16 PM
#14
On top of that, usually when this happens to me the car is extremely slow. As in, way less than an NA diesel slow. That makes me doubt that it is not-seeing-boost related.
Although I wonder what happens if vacuum somehow gets in. Maybe just leave the tube hanging unconnected and see what happens?
I still think you should remove it. It's not as hard as you think, "only" 15 minutes of wrangling to get it out after getting it loose iirc.
On top of that, usually when this happens to me the car is extremely slow. As in, way less than an NA diesel slow. That makes me doubt that it is not-seeing-boost related.
Although I wonder what happens if vacuum somehow gets in. Maybe just leave the tube hanging unconnected and see what happens?
02-11-2011, 09:55 PM
#15
1987 300D Sturmmachine
1991 300D Nearly Perfect
1985 300D Weekend/Camping/Dog car
1974 L508D Motoroam Monarch "NightMare"
OBK #42
It is physically impossible for me to remove my ALDA. without removing the intake/IP, I spent well over 15minutes after I got te ALDA loose trying to fish it out. There was some talk on BW and basically if the pump was put in at a certain angle (timing still right) .... It is a straight run from the manifold to the ALDA. I do believe that it is probably sticking. However even this evening, I got in the car temp still read just under 80* c after getting home from work and it still took several minutes for it to kick in.
1987 300D Sturmmachine
1991 300D Nearly Perfect
1985 300D Weekend/Camping/Dog car
1974 L508D Motoroam Monarch "NightMare"
OBK #42
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