LS170 Stalls during start-up

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bigjmcconnell

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Aug 14, 2006
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Hello, I am having a problem with my LS170. When I start it, it runs for about 10 or 20 seconds then stalls. It takes some cranking, but it will start again, and usually sputters and stops again. Usually on the 3rd try it runs fine and will run fine from then on. I have also had a stalling problem when going up a steep hill. If you shut it off after it is warmed up, it will start right back up. It seems like it is losing it prime in the fuel system. Have any of you come across this problem, or even better, the solution? This machine is new with only 130 hrs on it!! Thanks, --John
 

Tazza

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Does it blow alot of smoke when its spluttering? like 1 cylinder is not firing? mine will do this if i don't glow long enough, it will start and splutter and blow a cloud of white smoke but it does catch and work fine.
It sounds like you may have bad glow plugs, or a bad glow timer.
 

bigjmcconnell

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Aug 14, 2006
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Does it blow alot of smoke when its spluttering? like 1 cylinder is not firing? mine will do this if i don't glow long enough, it will start and splutter and blow a cloud of white smoke but it does catch and work fine.
It sounds like you may have bad glow plugs, or a bad glow timer.
No, it really doesn't make any smoke when it does it. It is just like someone shuts off the fuel. I am going to try to replace the fuel filters. I am told that there is a check valve in the filter and if that is not working properly, I can see the engine using the fuel thats in the line then being starved for fuel. Thanks for the ideas, I will post back, hopefully with success.
 

skidsteer.ca

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Jan 20, 2006
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No, it really doesn't make any smoke when it does it. It is just like someone shuts off the fuel. I am going to try to replace the fuel filters. I am told that there is a check valve in the filter and if that is not working properly, I can see the engine using the fuel thats in the line then being starved for fuel. Thanks for the ideas, I will post back, hopefully with success.
Most diesels have a return fuel line flowing back to the tank.
If your does, remove it and submerse the open end in a bucket of fuel and look for any air bubbles in the fuel coming from the engine. If present air in the return line it is a sure sign of a leak on the suction side. Which could cause the problems you mention.
Ken
 

bigjmcconnell

New member
Joined
Aug 14, 2006
Messages
3
Most diesels have a return fuel line flowing back to the tank.
If your does, remove it and submerse the open end in a bucket of fuel and look for any air bubbles in the fuel coming from the engine. If present air in the return line it is a sure sign of a leak on the suction side. Which could cause the problems you mention.
Ken
Thanks for all the replies. I replaced the fuel filters and I have not had any problems since. I expect that was causing my problems....I love a simple solution. Thanks, --John
 
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