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Old 03-14-2012, 05:05 PM   #1
softballnrd27
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87 Fuel Sending unit

I installed an 87 tank and sending unit in my 85 for the LS swap and I have 3 lines. I need to know what I do with the middle line, I have the feed and return hooked up I just need to figure something out with the 3rd line.
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Old 03-14-2012, 05:20 PM   #2
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Re: 87 Fuel Sending unit

I believe that's the vent line,and if you have fuel-injection it will have to be soldered/welded shut.
If its carburretted,just run it to a vent valve,or the fuel cannister(better).
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Old 03-14-2012, 05:24 PM   #3
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Re: 87 Fuel Sending unit

Shouldn't it be the vent to the charcoal canister?
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Old 03-14-2012, 05:29 PM   #4
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Re: 87 Fuel Sending unit

Yeah,that's what I mean.The black plastic one that we all catch on,once in a while!LOL!
There should already be a line for it.
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Old 03-14-2012, 07:23 PM   #5
softballnrd27
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Re: 87 Fuel Sending unit

That thing is long gone. Can I plug it with some rubber hose and fuel injection clamps?
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Old 03-14-2012, 07:55 PM   #6
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Re: 87 Fuel Sending unit

Yes,if it has a carb.But,you should then find a vented cap,or it may cause pressure in the line,and flood the carb,especially on warm days.That's what the charcoal cannister is for...to store fumes/vapor,until the engine runs again,at which time they are routed to the carb,to burn.
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Old 03-14-2012, 10:35 PM   #7
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Re: 87 Fuel Sending unit

I will be fuel injected. 2002 lq4 fyi
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Old 03-15-2012, 11:40 AM   #8
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Re: 87 Fuel Sending unit

See if a stock LQ4 (donor) uses CCP canister. If it does than set it up to use purge line (evap)

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