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Old 03-26-2014, 07:53 PM   #1
Operatorfailure
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Join Date: Apr 2011
Location: Springfield, MO
Posts: 172
87 tbi sending unit with walbro 450 e85 pump in Blazer tank.

I got my 87 Blazer tank in today and put the walbro 450 pump in the 87 Blazer sending unit. Everything went in great, just was curious about all of the connections on the sending unit. Two of the lines are obvious, feed and return. But there are two other lines. One small and one large. One is a vent and one is EVAP I assume. Can I just block off the EVAP?

The large line, is it the EVAP or the vent?

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