flipper687el
New Member
- Joined
- Jul 31, 2015
- Messages
- 2
- Country Flag
Guys don't know if anybody can help here.
After completing a head change 3 thousand miles ago with everything running sweet.
All of a sudden truck just would not start the following day after a longish run of 250 miles.
Spent time checking diesel was getting to the pump all OK, just no go what so ever cranking over with no smoke or any obvious problems.
I started reading the manual I bought from the Milner 4x4 and browsing forums to try to see if anybody has had these symptoms before.
Started looking at the spill valve and sensor on the fuel pump.
I measured the resistance of the spill valve and read an open circuit across the valve connector.
I also checked the voltage at the same connector but ECU side, to check that voltage was present.
What I found was on one side I had 12 volts in reference to negative and about 10.2 volts on the other contact with the ignition on.
So I have surmised that the potential across the spill valve is 2 volts approx
Reading the manual I have, suggests that a resistance reading of 1.4 to 2ohms should be found across the spill valve at 20 degrees C.
This would then equate to a current flow of approximately 1 amp through the valve which looking a the cable cross sectional area would appear to be a reasonable result.
So I have assumed the spill valve is playing up internally and going open circuit.
I spoke with Chris at Parkinsons, which are a parts supplier and diesel specialist and they managed to source a replacement DENSO spill valve which I picked up to day.
Before leaving to collect the valve I went to grab my multi meter from the truck and chanced my arm that it would start.
Low and behold it struck up no problem so I quickly stopped it opened the connector and measured the resistance across the valve 1.8 ohms.
Did not think to measure the voltage across the valve before stopping the engine to the see what was happening dooh.
Anyway convinced that the valve is the issue I went and picked up the new valve thinking I would start the truck when home and check to see what voltage was being developed across the valve.
But when I got home, again the truck would not start and the current spill valve read open circuit again.
The new one reads 1.6 ohms constant. However after catching a snippet of info on a forum where someone mentioned tuning tweaking performance by playing with the spill valve.
I am reluctant to fit the new valve as obviously with no dust cap fitted I can see a adjustment shaft and lock nut.
I was concerned that the new valve may not be factory set correctly so spoke with Chris who spoke with there contact specialist.
Chris said that the new valve is not set at factory and is normally adjusted to the pump which would require removal of the pump and sending to there contact and a 270.00 bill to fit and set.
I really don't want to have to remove the pump to do this if anybody knows if it is a simple process to set up the replacement spill valve when fitted on the engine.
My thoughts are maybe to remove the current valve take of the dust cover exposing the adjustment shaft.
Measure the adjustment shaft, exposed threads etc and check the current setting of the new valve and adjust where necessary.
Please anybody who knows more about these valves or has any ideas advice on setting these valves up can they speak up and edumacate a keen amateur!!!!!
Many thanks in advance
Dan.
After completing a head change 3 thousand miles ago with everything running sweet.
All of a sudden truck just would not start the following day after a longish run of 250 miles.
Spent time checking diesel was getting to the pump all OK, just no go what so ever cranking over with no smoke or any obvious problems.
I started reading the manual I bought from the Milner 4x4 and browsing forums to try to see if anybody has had these symptoms before.
Started looking at the spill valve and sensor on the fuel pump.
I measured the resistance of the spill valve and read an open circuit across the valve connector.
I also checked the voltage at the same connector but ECU side, to check that voltage was present.
What I found was on one side I had 12 volts in reference to negative and about 10.2 volts on the other contact with the ignition on.
So I have surmised that the potential across the spill valve is 2 volts approx
Reading the manual I have, suggests that a resistance reading of 1.4 to 2ohms should be found across the spill valve at 20 degrees C.
This would then equate to a current flow of approximately 1 amp through the valve which looking a the cable cross sectional area would appear to be a reasonable result.
So I have assumed the spill valve is playing up internally and going open circuit.
I spoke with Chris at Parkinsons, which are a parts supplier and diesel specialist and they managed to source a replacement DENSO spill valve which I picked up to day.
Before leaving to collect the valve I went to grab my multi meter from the truck and chanced my arm that it would start.
Low and behold it struck up no problem so I quickly stopped it opened the connector and measured the resistance across the valve 1.8 ohms.
Did not think to measure the voltage across the valve before stopping the engine to the see what was happening dooh.
Anyway convinced that the valve is the issue I went and picked up the new valve thinking I would start the truck when home and check to see what voltage was being developed across the valve.
But when I got home, again the truck would not start and the current spill valve read open circuit again.
The new one reads 1.6 ohms constant. However after catching a snippet of info on a forum where someone mentioned tuning tweaking performance by playing with the spill valve.
I am reluctant to fit the new valve as obviously with no dust cap fitted I can see a adjustment shaft and lock nut.
I was concerned that the new valve may not be factory set correctly so spoke with Chris who spoke with there contact specialist.
Chris said that the new valve is not set at factory and is normally adjusted to the pump which would require removal of the pump and sending to there contact and a 270.00 bill to fit and set.
I really don't want to have to remove the pump to do this if anybody knows if it is a simple process to set up the replacement spill valve when fitted on the engine.
My thoughts are maybe to remove the current valve take of the dust cover exposing the adjustment shaft.
Measure the adjustment shaft, exposed threads etc and check the current setting of the new valve and adjust where necessary.
Please anybody who knows more about these valves or has any ideas advice on setting these valves up can they speak up and edumacate a keen amateur!!!!!
Many thanks in advance
Dan.