1993 Glastron w 4.3L engine. Fuel Pump issue.

[Brewster1972]

I have recently acquired a 1993 Glastron with a 4.3L Volvo Penta engine (model 432). I rebuilt the water pump and the starter but the fuel pump is not pumping. I replaced the fuel pump and the relays. I them noticed that there is a resistor in line from the alternator to the fuel pump relay. If I take that out and bypass it the fuel pump starts pumping. I measured the resistor and it is the correct value. Does anyone know the purpose of this resistor in line to the fuel pump relay???? Desperately need help.

 

[dypcdiver]

Re: 1993 Glastron w 4.3L engine. Fuel Pump issue.

Are you sure it is a resistor and not a diode?

 

[Brewster1972]

Re: 1993 Glastron w 4.3L engine. Fuel Pump issue.

The parts says resistor on it and it measures 68ohms which are the same as the markings on the part. I believe that I also found a wiring diagram at "marinepartsexpress" for a volvo penta model 432A. It shows a resistor on it but not exactly in line.

 

[Walt T]

Re: 1993 Glastron w 4.3L engine. Fuel Pump issue.

Did you ohm it both ways?

 

[Brewster1972]

Re: 1993 Glastron w 4.3L engine. Fuel Pump issue.

Yep same both ways?!?!?!?

 

[Brewster1972]

Re: 1993 Glastron w 4.3L engine. Fuel Pump issue.

Does anyone know the reason for a resistor? Can I run without it?

 

[skydiveD30571]

Re: 1993 Glastron w 4.3L engine. Fuel Pump issue.

Do you have a link to this diagram? I couldn't find the right one. And how did you find out what the correct resistance is?

 

[Brewster1972]

Re: 1993 Glastron w 4.3L engine. Fuel Pump issue.

The part says the value on the side of it. Measures what it says.

 

[Brewster1972]

Re: 1993 Glastron w 4.3L engine. Fuel Pump issue.

Sorry wrong link. That was for the fuel pump. Here is the correct link. The resistor is item 53 on the right side.

http://www.marinepartsexpress.com/V...QUIPMENT/ELECTRICAL EQUIPMENT AND INSTRU1.pdf

 

[skydiveD30571]

Re: 1993 Glastron w 4.3L engine. Fuel Pump issue.

Ahh there it is. Never seen a resistor inline there before. Everyone else mentioned the diode because they are common and frequently fail.

I have no idea if it is ok to run with it or not. But I really doubt Volvo would go through the trouble of installing it for no reason. It's a $30 dollar part, that'd be cheap peace of mind for me.

By the way, resistors can measure resistance fine but have trouble once a certain amount of current or voltage travels through them.

 

[JagGuy]

Re: 1993 Glastron w 4.3L engine. Fuel Pump issue.

Hi

I have a 4.3 too (430 though). Instead of
piece-meal replacing ignition parts, I just
bought a distributor kit and replaced
everything.

I was trying to find the detail and can't
at the moment, but the instructions said
to remove a factory resistor that looks
very similar to #53, but closer to the
coil.

Anyhow . . . . I removed it and the
unbelievable happened. The engine
would start normally, but not shut off.
The key did nothing and even pulling
the lanyard out of the kill switch did
nothing. I ended up choking it to stall
the engine.

I didn't initially link the two things,
not thinking a resistor could do this.
But . . . . put the resistor back in and
everything was normal again.

Your resistor could be the same one,
just in a different place in the loom.

I can't answer your question about the
fuel pump, but I thought I would share
what removing a resistor can do.

Brian

 

[dypcdiver]

Re: 1993 Glastron w 4.3L engine. Fuel Pump issue.

I think you need to find out to what and where the wire goes. By mentioning the Alternator I think you threw us a curved ball

 

[Brewster1972]

Re: 1993 Glastron w 4.3L engine. Fuel Pump issue.

OK so I played with this for awhile this weekend... Without the resistor in the fuel pump goes non-stop even when the key is turned to accessory and while cranking and running... Put the resistor back in and the fuel pump only goes while cranking and running.... Left the resistor in and after working on the boat for awhile I now have it running and enjoyed the weekend on the lake. I believe that I flooded the engine when I was messing around trying to figure out if the resistor was bad and/or needed since it pumped fuel constantly without it.... Thanks for the replies........

 

[Walt T]

Re: 1993 Glastron w 4.3L engine. Fuel Pump issue.

Fuel pumps by themselves don't cause flooding. A spark plug check would have confirmed flooding.