 Cold start vale, Test for stuck open. |
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| DavidSweden |
 Jun 16 2015, 02:54 PM
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#1
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Member  Group: Members Posts: 481 Joined: 8-June 14 From: Sweden Member No.: 17,452 Region Association: Scandinavia  |
Can anyone tell how to test if the cold start valve is stuck open?
Thanks |
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| pilothyer |
Jun 16 2015, 06:44 PM
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#2
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Member Group: Members Posts: 838 Joined: 21-May 08 From: N. Alabama Member No.: 9,080 Region Association: South East States |
QUOTE(DavidSweden @ Jun 16 2015, 03:54 PM)  Can anyone tell how to test if the cold start valve is stuck open? Thanks The cold start valve should only operate when the ambient temp is very cold, and when the starter is engaged. Remove the valve and point it into a clear jar turn the switch on and see if fuel comes out when the fuel loop is pressurized .......if it does it is a leaker. If you want to test it for operation bypass the thermo switch and give it ground.....when the starter is engaged it should spray fuel into the jar. |
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| worn |
Jun 17 2015, 09:05 AM
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#3
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Winner of the Utah Twisted Joint Award Group: Members Posts: 3,470 Joined: 3-June 11 From: Madison, WI Member No.: 13,152 Region Association: Upper MidWest 
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QUOTE(DavidSweden @ Jun 16 2015, 01:54 PM) Can anyone tell how to test if the cold start valve is stuck open? Thanks In summer the plenum will be full of gas if it is stuck open very much. You can pull the air filter and look in. |
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| r_towle |
Jun 17 2015, 09:41 AM
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#4
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Custom Member Group: Members Posts: 24,705 Joined: 9-January 03 From: Taxachusetts Member No.: 124 Region Association: North East States
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get a piece of brake tubing the correct diameter and pull both fuel lines off the valve, route the fuel around it with the tubing in the middle of the two hoses.
Also unplug the electrics on the valve. They do leak and dribble raw fuel into the intake when old. rich |
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| Ian Stott |
Jun 17 2015, 04:38 PM
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#5
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Senior Member Group: Members Posts: 907 Joined: 28-January 08 From: Moncton/Canada Member No.: 8,635 Region Association: Canada |
Any chance you could post a picture of that, I need to do that.
Ian Stott Moncton Canada |
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| r_towle |
Jun 17 2015, 07:51 PM
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#6
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Custom Member Group: Members Posts: 24,705 Joined: 9-January 03 From: Taxachusetts Member No.: 124 Region Association: North East States
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QUOTE(Ian Stott @ Jun 17 2015, 06:38 PM) Any chance you could post a picture of that, I need to do that. Ian Stott Moncton Canada No pics but it's simple The cold start valve is shaped like a t splitter Fuel comes in one side and goes out the other. So. Pull off both fuel lines and put a piece of tubing inside both ends to connect them together....now no fuel will go through the cold start injector |
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| DavidSweden |
Jun 18 2015, 10:20 AM
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#7
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Member Group: Members Posts: 481 Joined: 8-June 14 From: Sweden Member No.: 17,452 Region Association: Scandinavia |
QUOTE(r_towle @ Jun 17 2015, 05:51 PM) QUOTE(Ian Stott @ Jun 17 2015, 06:38 PM) Any chance you could post a picture of that, I need to do that. Ian Stott Moncton Canada No pics but it's simple The cold start valve is shaped like a t splitter Fuel comes in one side and goes out the other. So. Pull off both fuel lines and put a piece of tubing inside both ends to connect them together....now no fuel will go through the cold start injector I may be mistaken but isnt the cold valve #3 on the pic. Only one input? (IMG:http://www.914world.com/bbs2/uploads_offsite/i1300.photobucket.com-17452-1434644451.1.jpg) |
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| pilothyer |
Jun 18 2015, 01:25 PM
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#8
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Member Group: Members Posts: 838 Joined: 21-May 08 From: N. Alabama Member No.: 9,080 Region Association: South East States |
The L-Jet has two ports, Maybe he thought you had L-Jet Fuel Injection.
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| r_towle |
Jun 18 2015, 01:57 PM
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#9
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Custom Member Group: Members Posts: 24,705 Joined: 9-January 03 From: Taxachusetts Member No.: 124 Region Association: North East States
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ok, so its one port.
remove the t-connector in the fuel line. OR, just simple plug it. The objective is to stop putting any fuel at all into that injector. rich |
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