Wiring and fuel pump question...
 

Recently acquired a Baja 272 Boss.. Replaced starter and she cranks and will run on starting fluid. Has 502 MPI. Being she is fuel injected, I would assume an electronic fuel pump. However, I don't hear one running when I turn on key. If anyone knows if this is electric or mechanical I would appreciate any advice.

Second issue is a wire that was cut from harness and connected directly to the battery. It is a 12 ga orange wire. There is a switch at the helm that lights up when this is connected (button is broke off so I am not sure what it is) but since it is wired direct, it stays on even when Perko battery switch is in off position. I am going to hook it back up like it should be, just wondering what it is if anyone knows.

Also in "wanted" section I have a post seeking a reset breaker for my Corsa silent choice. It is missing.

Thanks in advance!

Dustin

what year is the boat

Sorry for incomplete info...

1998 Baja 272 Boss. 502 MPI.

Thanks!

Friend of mine has the same set up, and the mechanical fuel pump runs off the back side of the sea pump

VST system

Thanks a lot! Will change filter/seperator look for a shutoff and test fuel pressure. Have a noid light set and will see if injectors are firing...

Dustin

check the screen filter in the VST tank, all that chit is on top back by the distrib.

I have the reset breaker for the Corsa system. I'm a little hesitant to sell since they're almost impossible to find anymore. A couple of years ago I bought a whole new harness for almost $250. Turned out to be a ground issue, not with my existing harness.

It says CDM-20 on it. See if you can find one. If not and you get desperate, I'll consider parting with it. I'll post a couple of pics of it tomorrow.

Here's a wiring diagram for the setup you should have.

my 1998 272 has the cool fuel system electric pump in a black plastic box on the port side of the engine by the motor mount

Reset Breaker

You should hear the fuel pump when you bump the key, I am on pump #3 on my 1999 502 their a huge PIA to change out, good luck

On the third pump? That sucks. OK, I took the week off to get this thing running. I follow the fuel line from the tank and it goes to the filter/seperator. From there, goes over to the other side of the engine into a blue thing that looks to be a cooler to me as it has water going through it as well. From there it goes to the pressure reg then to the engine. I am at a loss as to where the pumpis actually located. I don't hear anything when I turn on the key. Checked all fuses and can't even find one for a fuel pump. Been so bloody hot out I haven't spent too much time on it until now.... Did replace the starter to get it turning over and it will fire up on ether... so it isn't a spark issue. Will post results after tonight if anyone cares... Plan is to be on Saylorville this weekend (or sooner)

if it is a cool fuel system the regulator is mounted on top of the fuel pump and it has water hoses going in each end of the pump

YAY!!! Found the fuel pumps! Guessing one is a lift pump and one is a pressure pump... They both test good but do not turn on with ignition. I traced a gray wire back to a relay in the box mounted to the port side of intake. The relay in there is triggered by a dark green with stripe that goes to ECM. I manually powered the pumps and tried to start, no go. Guessing the ECM isn't getting power or it is bad. Anyone have a schematic for this? That would be SUPER helpful...

Also, hopefully not related, whenever I turn the batteries on the navigation lights are on. Most switches are worn off so I don't know which is nav lights, but either the switch is bad or wiring is jacked... Gonna pull the switch panel and see what skeletons come out...