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Old December 12th, 2005, 07:09 PM   #1
BigBlkYJ 355
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Default YJ Fuel System Question (Kinda Technical)

Ok, let me give a little explaination of what im doing first...

For those of u who dont know, a 350 is going in the YJ. Id like to use the stock fuel pump/sending unit, which will supply MORE than enough pressure for the carbed 350.

HOWEVER, as im reading my FSM, im finding out that the fuel pump has no blow by valve/over pressure release valve. Instead they incorporated this into the fuel pressure regulator which is located on the fuel rail of the motor. When the pressure gets too high it sends it back down the return line via vac pressure supplied from the motor.....

Well this wont work obviously with a carbed motor. There is no place for a return line. Ive gotten a Holley fuel pressure regulator for bringing the pressure down to where i want it for the carb, but if for some reason the engine dosn't fire within 2 seconds (like a carbed motor ever would do that), the pressure goes well over 100psi, and boom, there goes a fitting or line.....

What i want to know is if there is some sort of inline check valve you can purchase and i can reconnect to that fuel return line. It would have to have a fuel in, fuel out, and hi pressure fuel bypass/return to tank port. Id REALLY like to keep the in tank pump, and sender. If not, then i will have to go from there....

Thanx, sorry for the long read.
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Old December 12th, 2005, 08:54 PM   #2
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yea they make them, check out www.summitracing.com or www.jegs.com
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