[Supras] Fuel pump system priming and pump resistor

tom tomhwells at cox.net
Wed Sep 5 05:26:26 CDT 2007


Bernie, I left the resistor in place.  No problems.  I did have to replace the regulator soon after the swap.  I installed the one from the NA and have been running it for two years.   
Tom 87NA-T
Lexus, Lucas 550's, Walbro. 

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Message: 2
Date: Mon, 03 Sep 2007 17:20:42 -0400
From: "berniek at technicaldevelop.com" <berniek at technicaldevelop.com>
Subject: [Supras] Fuel pump system priming and pump resistor
To: "Supras at supras.com" <Supras at supras.com>
Message-ID: <46DC7AAA.3010801 at technicaldevelop.com>
Content-Type: text/plain; charset=ISO-8859-1; format=flowed

When pulling the engine out of my '91 turbo, I happened to turn on the 
ignition switch and the fuel pump ran, flooding the floor with fuel.  
Now with the new engine in place (also have Walbro pump in tank) that 
does not happen.  Every other FI car I've had has a "prime" mode where 
the pump will run for a few seconds with the ignition on but not in the 
start position.  Shorting +B and FP in the diagnostic connector does run 
the pump, so the Walbro installation is OK.  There is voltage to the 
pump when running the starter (measured at the FP connection.  Tank is 
empty for the moment so I can't run the pump for too long.  Still need 
to get upper intake, fuel rail and intercooler piping in place. 


Also:  What is the recommendation about the fuel pump resistor with the 
Walbro pump?  Should it be removed or replaced with a resistor of lower 
resistance?


Thanks, as always.


BernieK. 


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