* Won't Shut Down, Smoke, IPC link rod *
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- Zoltan
- Posts: 136
- Joined: 18 years ago
- Location: Honolulu, HI
* Won't Shut Down, Smoke, IPC link rod *
Hello Philip, happy to see you back on line...
This is becoming a convoluted EGR system mess on my hands ... My goal is to return oil consumption and running temperature to normal. A bonus would be the de-Californiazation of my engine. I am looking at EC-29 in the FSM and I am not sure how I could get rid off the EGR without affecting the sub-ventory vacuum port and, ultimately, without affecting throttle valve position. It seems to be all connected.
1. EGR vacuum tube is disconnected from the vacuum amplifier. If EGR vacuum tube is connected I get high idle.
2. Idle and engine shut-down seems to be OK now with the EGR vacuum tube disconnected, yet the engine is still running hot (it's steady in the middle).
3. Thermostat is new, water seems to circulate well in the radiator.
4. Just replaced a quart of oil ... (after less then 150 miles). Result of hot running engine?
5. No smoke from tail pipe, but plenty smoke from road draft tube.
6. DPC control looks new, IPC seems to be doing the right thing (only did the quick and dirty check, didn't do the check with a test light and adaptors)
Where do I go from here? Need some help, please! A list of things to do in logical order ... so I can go down the list and report back to this thread
This is becoming a convoluted EGR system mess on my hands ... My goal is to return oil consumption and running temperature to normal. A bonus would be the de-Californiazation of my engine. I am looking at EC-29 in the FSM and I am not sure how I could get rid off the EGR without affecting the sub-ventory vacuum port and, ultimately, without affecting throttle valve position. It seems to be all connected.
1. EGR vacuum tube is disconnected from the vacuum amplifier. If EGR vacuum tube is connected I get high idle.
2. Idle and engine shut-down seems to be OK now with the EGR vacuum tube disconnected, yet the engine is still running hot (it's steady in the middle).
3. Thermostat is new, water seems to circulate well in the radiator.
4. Just replaced a quart of oil ... (after less then 150 miles). Result of hot running engine?
5. No smoke from tail pipe, but plenty smoke from road draft tube.
6. DPC control looks new, IPC seems to be doing the right thing (only did the quick and dirty check, didn't do the check with a test light and adaptors)
Where do I go from here? Need some help, please! A list of things to do in logical order ... so I can go down the list and report back to this thread
- Zoltan -
________________________________
'82 Datsun 720 SD22 California model
'86 Ford Escort 2.0L Diesel
________________________________
'82 Datsun 720 SD22 California model
'86 Ford Escort 2.0L Diesel
- philip
- Deceased
- Posts: 1494
- Joined: 18 years ago
- Location: Southern California, USA
Nice to be back. Opportunistic infection required 7 days of hospital IV antibiotics.Zoltan wrote:Hello Philip, happy to see you back on line...
This is becoming a convoluted EGR system mess on my hands ... My goal is to return oil consumption and running temperature to normal. SNIP
1. EGR vacuum tube is disconnected from the vacuum amplifier. If EGR vacuum tube is connected I get high idle. SNIP
Reconnect the entire EGR system exactly. And I do mean EXACTLY.
From the Coolant Temperature Sensor located on the side of the oil heat exchanger, remove and plug off the hose from the CTS connecting to the metal vacuum line that feeds the pneumatic governor apply side vacuum. Done.
Oil leaves the crankcase by way of:
1. Seals (external leaks)
2. Seals (internal leaks ... valve guide seals and piston rings)
3. Thinned oil due to fuel contamination and/or excessive heat.
These things can be brought about by:
4. Injection timing occuring too early.
5. Running sustained rpm way in excess of max torque rpm range.
6. Oil returns from cylinder head/valve train restricted. (valve area fills with oil).
-Philip
Passed 08May2008
My friend, you are missed . . .
1982 Datsun 720KC SD-22
"Im slow and I'm ahead of you"
Passed 08May2008
My friend, you are missed . . .
1982 Datsun 720KC SD-22
"Im slow and I'm ahead of you"
- Zoltan
- Posts: 136
- Joined: 18 years ago
- Location: Honolulu, HI
DONE. please check this picture to make sure that I disconnected the right tube.Reconnect the entire EGR system exactly. And I do mean EXACTLY.
From the Coolant Temperature Sensor located on the side of the oil heat exchanger, remove and plug off the hose from the CTS connecting to the metal vacuum line that feeds the pneumatic governor apply side vacuum. Done.
I noticed a small metal cylinder inside the disconnected rubber tube that, I assume, restricted/controlled the airflow towards the pump. If I cover the hole on the metal tube, the engine will shut down. Is that normal?
I reset the idle to 674 rpm and set the smoke screw. I am waiting for Al's custom made pressure tester he is kindly lending to me to see what compression I get in all cylinders.
- Zoltan -
________________________________
'82 Datsun 720 SD22 California model
'86 Ford Escort 2.0L Diesel
________________________________
'82 Datsun 720 SD22 California model
'86 Ford Escort 2.0L Diesel
- philip
- Deceased
- Posts: 1494
- Joined: 18 years ago
- Location: Southern California, USA
Zoltan wrote:DONE. please check
IF ... you find that capping the metal line port has anymore than a small effect on idle RPM, then adjust the throttle body idle stop bolt and maybe the smoke setscrew again. This assuming the pneumatic governor diaphragm passes muster.
Last edited by philip 17 years ago, edited 1 time in total.
-Philip
Passed 08May2008
My friend, you are missed . . .
1982 Datsun 720KC SD-22
"Im slow and I'm ahead of you"
Passed 08May2008
My friend, you are missed . . .
1982 Datsun 720KC SD-22
"Im slow and I'm ahead of you"
- Zoltan
- Posts: 136
- Joined: 18 years ago
- Location: Honolulu, HI
- Zoltan
- Posts: 136
- Joined: 18 years ago
- Location: Honolulu, HI
- philip
- Deceased
- Posts: 1494
- Joined: 18 years ago
- Location: Southern California, USA
Cap off the metal line spigot (earlier illustration) and then readjust the air butterfly stop bolt so that the engine does idle.Zoltan wrote:As I said, capping the metal tube would shut the engine down. I have a new diaphragm, so I will install it and see if that helps.
-Philip
Passed 08May2008
My friend, you are missed . . .
1982 Datsun 720KC SD-22
"Im slow and I'm ahead of you"
Passed 08May2008
My friend, you are missed . . .
1982 Datsun 720KC SD-22
"Im slow and I'm ahead of you"
- Zoltan
- Posts: 136
- Joined: 18 years ago
- Location: Honolulu, HI
I capped off the metal line spigott and adjusted the rpm to about 700. The engine immediately started smoking, so I adjusted the "smoker" bolt as well and took it to a test drive. I kept adjusting the smoker screw until I didn't see smoke coming from the tailpipe and the truck was pulling normally.
Now the shut-down problem came back. When I turn the ignition key off, the engine keeps running LOOONG time. If I turn the key ON again and a few seconds later turn it off, then it shuts down. Could this phenomena be due to oil feeding into the combustion chamber from bad valve stem seals? Also, could the oil, I found behind the cover of the pneumatic governer diaphragm, have come from the same source through the EGR?
Now the shut-down problem came back. When I turn the ignition key off, the engine keeps running LOOONG time. If I turn the key ON again and a few seconds later turn it off, then it shuts down. Could this phenomena be due to oil feeding into the combustion chamber from bad valve stem seals? Also, could the oil, I found behind the cover of the pneumatic governer diaphragm, have come from the same source through the EGR?
- Zoltan -
________________________________
'82 Datsun 720 SD22 California model
'86 Ford Escort 2.0L Diesel
________________________________
'82 Datsun 720 SD22 California model
'86 Ford Escort 2.0L Diesel
- philip
- Deceased
- Posts: 1494
- Joined: 18 years ago
- Location: Southern California, USA
I'm curious, ... how much smoke screw adjustment was required in the "lean" direction?Zoltan wrote:I capped off the metal line spigott and adjusted the rpm to about 700. The engine immediately started smoking, so I adjusted the "smoker" bolt as well and took it to a test drive. I kept adjusting the smoker screw until I didn't see smoke coming from the tailpipe and the truck was pulling normally.
You might find this useful? Venting what should not get vented
A "looong" time is more than 30 seconds? But a repeat ignition switch OFF cycle results in immediate shutdown? I would push aside residual oil ... for now. Turn the engine OFF. While it is still trying to shut down, push the Fuel Control Lever a little bit further to the left (CCW). If that's all it takes to complete the shut down, then the nylon bushings on the rod linking the Fuel Control Lever to the IPC are quite sloppy or your over-run adjustment on the Fuel Control lever pin is not centered in the hole when the lever is in the RUN position.Zoltan wrote:Now the shut-down problem came back. When I turn the ignition key off, the engine keeps running LOOONG time. If I turn the key ON again and a few seconds later turn it off, then it shuts down.
Each time I have removed the diaphragm cover, there has been oil present ... the same goop that I had earlier installed on the OTHER SIDE of the diaphragm for "preservative" purposes. The seal between the diaphragm and the housing is not perfect.Zoltan wrote:Could this phenomena be due to oil feeding into the combustion chamber from bad valve stem seals? Also, could the oil, I found behind the cover of the pneumatic governer diaphragm, have come from the same source through the EGR?
-Philip
Passed 08May2008
My friend, you are missed . . .
1982 Datsun 720KC SD-22
"Im slow and I'm ahead of you"
Passed 08May2008
My friend, you are missed . . .
1982 Datsun 720KC SD-22
"Im slow and I'm ahead of you"
-
- Posts: 70
- Joined: 18 years ago
- Location: Eugene, OR
- Zoltan
- Posts: 136
- Joined: 18 years ago
- Location: Honolulu, HI
********************************************************************************************************************zoltan wrote:
SNIP Now if I set the smoke screw so that the engine runs strong without smoke (or not as much smoke that I can detect in the rear view mirror), then the engine shuts down normally.
EvergreenSD wrote: Another interesting sign of wear on this pump is the way the altitude compensator has carved a divot into the pin that it can act against.
Mine looks ecactly the same... so I am not sure it's the works of the altitude compensator. Perhaps it's factory made, it's where the altitude compensator is supposed to grab into ?
OK ... I will get those plastic bushings and see if that helps.
- Zoltan -
________________________________
'82 Datsun 720 SD22 California model
'86 Ford Escort 2.0L Diesel
________________________________
'82 Datsun 720 SD22 California model
'86 Ford Escort 2.0L Diesel
- Zoltan
- Posts: 136
- Joined: 18 years ago
- Location: Honolulu, HI
DID ANYONE REPLACE THOSE BUSHINGS BEFORE? ACCORDING TO MY PART CATALOG, THE CONTROLLER ASSY COMES AS ONE UNIT (CODE# 16836) AND THERE ARE NO LISTINGS FOR THE BUSHING....
I'LL TRY ACE HARDWARE
I'LL TRY ACE HARDWARE
- Zoltan -
________________________________
'82 Datsun 720 SD22 California model
'86 Ford Escort 2.0L Diesel
________________________________
'82 Datsun 720 SD22 California model
'86 Ford Escort 2.0L Diesel
- philip
- Deceased
- Posts: 1494
- Joined: 18 years ago
- Location: Southern California, USA
In case you need more on the Altitude Compensator.Zoltan wrote:EvergreenSD wrote: Another interesting sign of wear on this pump is the way the altitude compensator has carved a divot into the pin that it can act against.
Mine looks ecactly the same... so I am not sure it's the works of the altitude compensator. Perhaps it's factory made, it's where the altitude compensator is supposed to grab into ?
OK ... I will get those plastic bushings and see if that helps.
With the truck at sea level and idling, the compensator tip must only rest ... on the fuel lever pin.
-Philip
Passed 08May2008
My friend, you are missed . . .
1982 Datsun 720KC SD-22
"Im slow and I'm ahead of you"
Passed 08May2008
My friend, you are missed . . .
1982 Datsun 720KC SD-22
"Im slow and I'm ahead of you"
- philip
- Deceased
- Posts: 1494
- Joined: 18 years ago
- Location: Southern California, USA
Then stop mucking with the setscrew. Inconsistant shut down is a matter of MOVING the fuel control lever far enough to kill the engine.zoltan wrote:SNIP Now if I set the smoke screw so that the engine runs strong without smoke (or not as much smoke that I can detect in the rear view mirror), then the engine shuts down normally.
There are two points to inspect/adjust.
1) worn linkage rod pivot bushings
2) correct fuel lever overrun adjustment
There is a plastic bushing on each end of the link rod. Linear slop will diminish the IPC's ability to push/pull the fuel control lever considerably and thus ... starting and shutdown reliability.
This image shows the Fuel Control Lever in RUN ('drive'). AFTER you get new plastic bushings on the link rod AND with the engine idling, loosen the two adjustment screws and move the overrun plate so that the 'pin' is centered in the hole. The adjustment slots WILL be way off at one end as shown. Test.
-Philip
Passed 08May2008
My friend, you are missed . . .
1982 Datsun 720KC SD-22
"Im slow and I'm ahead of you"
Passed 08May2008
My friend, you are missed . . .
1982 Datsun 720KC SD-22
"Im slow and I'm ahead of you"
- Knucklehead
- Posts: 148
- Joined: 18 years ago
- Location: Phoenix
When I first got my truck back in about '90 everything was worn out. All linkage ends and spindles were nearly worn through, bushings long gone. I built most things up with brazing rod, including both contact points for the altitude compensator. On one spindle on the pump linkage that I didn't want to do because I didn't want to discolor the zinc, I have always just used a 1/4" brass ferrule (which is slid over in the picture so the wear is visible). I have replaced most bushings a few times since. I usually use whatever is at hand or modify something from the hardware store. Quicker and cheaper than going to Nissan.DID ANYONE REPLACE THOSE BUSHINGS BEFORE?
Last edited by Knucklehead 17 years ago, edited 1 time in total.
'82 standard cab 3 axle SD22 turbo
'89 int'l 9700 Cummins 444 (855 ci)
'29 HD FD export model
'89 int'l 9700 Cummins 444 (855 ci)
'29 HD FD export model
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