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Post by case998 on Jan 31, 2012 20:33:53 GMT 1
Hello, i am having trouble starting my cargo in the cold weather, its a 1985 0811 and afaik you depress the accelerator to start the engine. This was working fine in the summer but recently it refuses to start. The battery is a new 110 amp lucas and ive replaced fuel filters and bled the fuel through but the only way i can start it is to lift the cab and use air dryer at the air intake on the engine side of the cleaner box. It starts immediately when i do this so is something failing when the accelerator is pressed to the floor. Regards keith.
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Post by alfiebeard on Jan 31, 2012 21:46:39 GMT 1
Hi I suspect the cold start sensor on the side of the thermostat cover has failed, this sensor passes full 12v to the cold start solenoid on the side of the injector pump when cold and as the water temp rises it goes open circuit which drops the 12v off.To test it 1st locate the sensor (it has 2 connections on it) short out the connections, then get in the cab and hold your foot to the floor on the accelerator, then turn on the ignition, you should hear a distinct click, then crank the engine over it should start virtually instantly, as soon as it starts ease off the accelerator , I done away with the sensor and fitted a switch on the dash. Hope this helps let me know how you get on. Alf Beard
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Post by case998 on Feb 1, 2012 16:30:07 GMT 1
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urena
Cargo 7.5 Ton Driver
recovery co owner
Posts: 257
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Post by urena on Feb 1, 2012 17:12:08 GMT 1
last one with 2 spades
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Post by case998 on Feb 1, 2012 20:31:54 GMT 1
Thats what i thought and there,s no wires going to it. The 2 wires in pic 3 which are connected look like they should connect to the spades on the sensor can anyone confirm this and thanks for reply regards keith.
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Post by alfiebeard on Feb 1, 2012 21:08:26 GMT 1
Hi yes those 2 wires should be connected to that sensor (which is the cold start sensor) check that no one has fitted a switch in the cab for the cold start solenoid as if there isnt one then your engine will be smoking like a steam train as the cold start solenoid will always be engaged, when you turn the ignition on DO YOU GET A CLICK FROM THE PUMP? if not then a fuse may have gone or a switch has been fitted that you hav,nt found. the 1st picture is showing the solenoid on the side of the pump, if you put a 12v + onto this solenoid it should click, to get the cold start to work you have to have the throttle to the floor then crank the engine. Let me know if you can hear the click.
Alf
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Post by case998 on Feb 1, 2012 21:58:51 GMT 1
The thing does seem to smoke quite a bit now you mention it, i carn,t stand near it or i would choke when its on tick over. I carn,t hear nowt apart from the ear bleeding park brake buzzer, when its upto pressure if i stop and restart the engine would i here it click then or would it be to warm if that makes sence. Maybe i can take the fuse from that buzzer so i can here whats going on is thet feasible.
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Post by alfiebeard on Feb 1, 2012 23:41:12 GMT 1
Hi if you tilt the cab and stand on the drivers side and put your hand on the pump solenoid and get someone to turn the ignition on you should feel a click, when the engine is running you could pull the 2 wires apart (the ones that should be on the sensor) and if the cold start is working the smoke should clear a bit, bearing in mind these old Dorset engines always smoke a bit on start up and on tick-over thats why ive fitted a stack to mine, (keeps the seagulls away) ;D.also the buzzer you can hear is the brake pressure warning buzzer it isnt for the handbrake, in answer to your question whether the cold start would come on when warm, yes it would if the sensor is bypassed. Alf
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Post by case998 on Feb 2, 2012 0:02:51 GMT 1
Cheers Alf i will try that tomorrow and let you know how i get on.
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Stuart G
Cargo 7.5 Ton Driver
Posts: 211
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Post by Stuart G on Feb 3, 2012 0:53:45 GMT 1
Slightly off topic, but still relevant, I started mine up today after about 2 weeks being static. Not sure what the Cummins 290 cold start procedure is (will have to check my workshop manual), but took about 3-4 seconds of cranking to fire and start. Usually it's off the key within a second.
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Post by case998 on Feb 4, 2012 13:01:19 GMT 1
Forgot to mention the battery is been drained by something but im not sure what so for now ive disconnected it and plan to fit an isolator in the near future.
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Post by alfiebeard on Feb 4, 2012 18:07:13 GMT 1
Slightly off topic, but still relevant, I started mine up today after about 2 weeks being static. Not sure what the Cummins 290 cold start procedure is (will have to check my workshop manual), but took about 3-4 seconds of cranking to fire and start. Usually it's off the key within a second. Quality engine the Cummins 290,I think the cold start system is similar to the Dorset/Dover but not certain, I would think its just coz its a little colder lately . Alf
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Stuart G
Cargo 7.5 Ton Driver
Posts: 211
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Post by Stuart G on Feb 4, 2012 18:16:54 GMT 1
Slightly off topic, but still relevant, I started mine up today after about 2 weeks being static. Not sure what the Cummins 290 cold start procedure is (will have to check my workshop manual), but took about 3-4 seconds of cranking to fire and start. Usually it's off the key within a second. Quality engine the Cummins 290,I think the cold start system is similar to the Dorset/Dover but not certain, I would think its just coz its a little colder lately . Alf Yep; I reckon it's been colder down these here parts lately than your neck of the woods Alfie!?! I'll get my workshop manual out and check that cold start system on mine - just curious!
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Post by alfiebeard on Feb 4, 2012 22:06:48 GMT 1
Hi Again,
Yes we have also had a real drop in temp up here recently,
let me know how your cold start sytem works if it is different from the Dover/Dorset engines I would be interested to know an differences.
cheers
Alfie
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Post by case998 on Feb 6, 2012 19:19:20 GMT 1
Tried to listen for a click today but carn,t hear anything, also no extra switches in cab that i can see. How do i test to see if the system is working properly. Regards keith.
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