| fuel system [message #223479] |
Mon, 23 September 2013 20:25  |
mickey szilagyi
Messages: 273
Registered: January 2013
Karma:
|
Senior Member |
|
|
We have several problems with our fuel system and are looking for a schematic of the entire system and an explanation of how it all works. I've checked the forum and can't find some of the things I've read in the past or specifics that addresses what we are looking for.
First of all our fuel gauge works sporadically. And when it does work it may work only for the main tank and not the auxiliary tank. We're trying to determine if the sending unit is bad or if there is a ground problem in the wiring. My understanding is that if the gauge shows empty then the ground is OK. And here's the strange part. With the ignition on it seems that if I play with the shift selector, from park to reverse and so forth the gauge will suddenly work.
We figured we'd just live with this oddity until we needed to deal with the fuel tanks. Well, for the first time since purchasing our coach, we filled the tanks almost full and found that we have a leak when the rear of the coach is lower than the front. So now we're about to deal with the tanks to find the leak. It's not a fuel line leak as it doesn't leak when the engine is running. This just appeared when we put more fuel in the tanks. And we'd like to know just how the fuel system works.
Is there a good detailed diagram that shows the two tanks, how they are connected to each other, where the sending unit is and if there is a sending unit in each tank. We understand the fuel pump is in one of the tanks but we aren't sure. What exactly is happening when we switch the dash board fuel switch from main to auxiliary tanks?
We are having this work done at a repair facility and these are some of the questions we have as well as the mechanics have asked. We have a parts book and maintenance manual. There is one schematic in the parts manual but it's really hard to figure out what is what. Since the tanks will be down we are considering having the insides coated, all the lines checked etc.
Any help with these questions and a reference for a good diagram of the fuel system would be much appreciated.
Thanks again to everyone, you have been a great help as we proceed with our restoration.
Mickey
1977 Kingsley, 403, Lansing, MI
|
|
|
|
GMCforum
Search
Help
Register
Login
Home
