I have a 1987 Jeep Wrangler with the inline six and a weber 38 on it and I want to get ride of the mechanical fuel pump and go with an electric one. Does anyone know the best way to do this? Is there a kit?
Block off plates are available. But The mechanical fuel pump is the most reliable way to feed a carb. The only use I would have for an elect pump is as a boost pump for starting after sitting a week or more.
Block off plates are available. But The mechanical fuel pump is the most reliable way to feed a carb. The only use I would have for an elect pump is as a boost pump for starting after sitting a week or more.
If you don't disconnect the fuel lines, the mech pump will act as a restricion to the elec pump and if the mech pump is over powered you'd blow the diaphragm. If you disconnect the fuel lines and leave it in place, it will fail fom being ran dry. The fuel coming thru cools the pump much like it does an electric one. IMO the Mech fuel pump is an advantage over electric and would leave it in place (K.I.S.S. method). A mech pump is much less likely to fail and your carb does not need any more fuel pressure than what it provides. If you must go electric, get a block off plate.
You can get these 7 psi pumps at just about any parts house. Last one I bought was like 22 bucks, even came with a inline filter before it. Remember electric pumps like to push fuel not pull it. So mount it LOW like on the frame rail. I never liked the mech ones on the block. WHEN they leak, they always do, they fill the oil pan full of fuel and ruin bearings.
Awesome thanks for the info. Another question I'd like to ask is the order of components starting from the tank. My current understanding follows this setup:
Tank
Fuel Pump w/integrated filter (Mounted by tank)
Fuel Filter w/return line (Engine Bay)
Fuel Pressure Regulator w/gauge (Engine Bay)
Carb
Some people have placed the FPR before the filter and I don't see why.
I still needed the regulator with my Carter pump. It's pushing 6 psi, which is too much for my Weber 38. It was flooding. I installed a Redline regulator. I'm running 3 psi now.
Okay thanks a lot everyone. I plan to go with the carter electric fuel pump and get a block off plate for the mechanical pump. I'm not sure about the pressure switch mentioned above. With a return line and a proper fuel pressure regulator I see no reason why the pump can't run any time the ignition is switched to "run". Unless the concern is in an accident when the lines may become disconnected from the engine. I guess the switch might not be a bad idea.
They make oil pressure switchs that cut power to the fuel pump when there is no oil pressure. Look in circle track mags or where they sell circle track stuff.
This is an older thread, you may not receive a response, and could be reviving an old thread. Please consider creating a new thread.
Related Threads
?
?
?
?
?
Jeep Enthusiast Forums
18.5M posts
726.8K members
Since 2000
A forum community dedicated to all jeep owners and enthusiasts. Come join the discussion about performance, engine swaps, modifications, classifieds, troubleshooting, maintenance, and more!