LouC wrote:
The electric pumps for the carbed engines are not as expensive as the ones for the EFI engines because they are low pressure pumps, like 5-7 psi max is what they should put out. I'd probably do a pressure and volume test before tearing into the carb. The mechanical pumps like the one I have on my old Pre-Vortec 4.3 are pretty cheap, like $100 or so, takes about an hr. to change, but you have to fiddle with that pain in the neck pushrod that is run off the camshaft. The plus side is that mechanical pumps, last a very long time...in fact I just replaced the original one on my boat last summer. With electric pumps the issues you can have sometimes are bad wiring connections that don't put full voltage to the pump and relays that can fail intermittently. Myself I prefer the simple mechanical pump but the newer engines have no provision for them...
http://www.volvopentastore.com/Fuel-Pum ... _id.776028not sure if this is the right model # for yours but you can see why I prefer mechanical pumps! If it turns out to be the pump you might be able to find a less expensive aftermarket pump, it is probably made by Carter, if you can find out the actual Carter part # you might be able to get it a lot cheaper than what Volvo charges for the same thing...
https://www.michiganmotorz.com/volvo-pe ... 9_292.htmlthese are probably aftermarket, you can see the price difference, you first have to find out how to check the pump and then go from there.
So... Question: is it possible that the electric fuel pump for a 2BBL setup would be different than that of a 4BBL setup? It just dawned on me that the original motor in this boat was a 2BBL. when I replaced the engine awhile back, the new one came with everything, fuel pump, wiring harness, etc... Hence why I have a spare fuel pump kicking around.. somewhere. Awhile back I had swapped out the pumps thinking it might be the cause of one of my past issues. I can't remember if I ever put the original pump back on... So I could potentially be running a 2BBL pump on my now 4 BBL engine.
Could this be why it would be starving for fuel? Or would the flow rates be the same for all electric pumps for a 4.3L?