Originally Posted by coas
I'm using E2182, capable 50GPH @ 110PSI, mounted on the frame just outside the fuel tank, about two feet from the exhaust tail pipe, no heat shield and it's working perfectly for a year now.
The pump is available at most parts stores and cost about 90$.
The advantage of the E2182 over other pumps, especially the E2000, is the 1/2 inlet, as opposed to 5/16 (e2000) or 3/8 at other pumps. The larger inlet allow better/easier priming.
The pump doesn't need aluminum finned body, the extra fuel flowing throe it cool it down. Stock Jeep 4.0L pump is capable of 21-24 GPH, the extra capacity of the external pumps cool it down.
Hi, you seem to be rather knowledgeable on this subject so I would appreciate your comments on the problem I'm having.
I have a 1975 Wagoneer with a 360 V8. It used to have a 4bl carb but I converted to multi point EFI a few years ago. The system was supplied to me by CustomEfis. The system uses the E2182 EFI pump, the stock fuel tank and the stock 5/16 line to supply the pump. From the pump to the fuel rail I use a high presuure 3/8 hose and no filter. The pump is mounted on the inner side of the Jeep's frame (so no heat issue from the twin exhaust running down the outer side of the frame) and is a few inches from the front of the fuel tank. Fuel to the pump is supplied by atmosheric pressure through the 5/16 line from the back and over the top of the tank. There is a regular fuel filter before the pump's inlet. When the system is operating normally it works absolutely fine with no problems at all at a steady 40 PSI (I have a fuel pressure gauge mounted on the fuel rail). The problem I'm having is the following:
From a cold start and after about 45 minutes driving the fuel pressure starts to drop and the engine finally stalls after a couple of minutes or so. I need to wait about 15 minutes before I can start up and drive away for the problem to recur in a little while. The problem has been noticed to be aggrevated by hot weather conditions (I live in Athens Greece). In the summer, and again from a cold start, the problem appears after about 15-20 minutes.
I suspect the problem is fuel pump cavitation from heated fuel. I will try to install the pump in the tank (which should resolve the problem once and for all), but this may be practically very difficult to do on this vehicle. The alternative options I'm considering are:
1 - to open a 1/2 inch hole at the lowest point of the tank (which is at the back of the tank) and run a 1/2 inch line to supply the E2182. Keeping the tank always more than 1/4 full should give the pump sufficient and constant fuel availability for the pump to prime, even in hot weather conditions.
2 - The E2182 is rated 50 GPH which is way over what the system needs. So maybe installing the E8228 with a 38 GPH rating (and similar PSI rating) will reduce the amount of fuel being circulated between the engine and the tank per unit of time, and thus keep its tempreture lower. Also, I understand the E8228 has a 5/16 inlet which will eliminate the need to open a 1/2 inch hole in the tank.
For either option above, if deemed viable, would installing a low pressure electric pump to supply the EFI pump help in any way?
In any case I will take down the tank again and have it thoroughly cleaned. Worn tubing in the tank has already been replaced.
I would highly appreciate your comments and any other suggestions you may have.