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fuel pressure
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FMC
Posted 2013-09-30 9:46 PM (#1991)
Subject: fuel pressure


Regular

2525
Location: Lavallette, NJ 08735
Hi all, been awhile since I actually had the time to put into the old girl. I bought it with an upgraded edlebrock 4200 series carb, and it ran decent. Fuel pump was leaking, and replaced with whatever auto parts store gave me. Since then it starts strong, then just dies out, and will not restart (until the next time I try 2 weeks later). Now I had a helper scope it out back there while attempting to start, and fuel shoots out the top of the carb. Looked it up, and seems that carb will do that under too much pressure situation. Is it possible that there would be a fuel pressure regulator thingamajigl or any suggestions on reducing pressure (as economically and effectively as possible). Would I be able to get a fuel pump that simply pumps at a reduced pressure? Sorry, just not a gear head, but try what I can. Thanks, Robert

...then, I'll actually get to those brakes I asked about like 8 months ago...I hope...

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B. Sitton
Posted 2013-10-03 8:21 AM (#1992 - in reply to #1991)
Subject: Re: fuel pressure


Extreme Veteran

100100100252525
Location: Ignacio Colorado
The stock fuel pump pressure spec is 5-7 psi. they make a fuel pressure regulator that you can dial in to whatever pressure you wish. The problem is your carb needs new needle and seat fuel valves. A rebuild kit will have them in it.
Bill
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FMC
Posted 2013-10-16 8:35 PM (#2009 - in reply to #1991)
Subject: RE: fuel pressure


Regular

2525
Location: Lavallette, NJ 08735
Thank You!
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FMC
Posted 2013-10-16 9:09 PM (#2011 - in reply to #1991)
Subject: Re: fuel pressure


Regular

2525
Location: Lavallette, NJ 08735
Any idea if the top of the carb can be accessed from inside the coach? Thx!
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highwaystar50
Posted 2013-10-18 1:51 PM (#2015 - in reply to #2011)
Subject: Re: fuel pressure


Contributor


Location: Mira Loma, Ca.
http://groups.yahoo.com/neo/groups/FMCMotorCoach/photos/albums/1062...

In this picture of my #667 you'll notice that there is an access over the engine. I don't know if this panel exists in all years/models but you could take a look.
Karl
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FMC
Posted 2013-10-22 7:04 AM (#2016 - in reply to #1991)
Subject: Re: fuel pressure


Regular

2525
Location: Lavallette, NJ 08735
Thank you, Karl, but I cannot seem to open picture. If you can describe it maybe? Mean time, now that I know there may be something to look for, I'll go do that...
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BigRabbitMan
Posted 2013-10-22 10:38 AM (#2017 - in reply to #1991)
Subject: Re: fuel pressure



Expert

1000100100
Location: Cottage Grove, OR
<p><font size="3">None of the coaches had an interior access panel from above as built by FMC. However, a number of owners over time added an access panel to their coaches.  This was particularly true of the earliest coaches as the top of the engine compartment is lower for those coaches than later ones. </font></p><p><font size="3">As a result, yours may or may not have an access panel.</font></p>
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dkarnath
Posted 2013-10-22 11:49 AM (#2018 - in reply to #1991)
Subject: Re: fuel pressure


Elite Veteran

500100
Location: Medford, OR
If you look on the yahoo website...lool for my album for #0184...I have some pictures of the hatch above my motor I believe in there.....very handy for carb work, distributor, intake....For some reason my computers not up loading all the albums in yahoo??? Maybe its working for other people...

Dan
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BigRabbitMan
Posted 2013-10-22 12:27 PM (#2019 - in reply to #2018)
Subject: Re: fuel pressure



Expert

1000100100
Location: Cottage Grove, OR

dkarnath - 2013-10-22 9:49 AM If you look on the yahoo website...lool for my album for #0184...I have some pictures of the hatch above my motor I believe in there.....very handy for carb work, distributor, intake....For some reason my computers not up loading all the albums in yahoo??? Maybe its working for other people... Dan

Can you also upload the pictures to an album on this site as well?  It would make things easier.

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dkarnath
Posted 2013-10-23 11:41 AM (#2021 - in reply to #1991)
Subject: Re: fuel pressure


Elite Veteran

500100
Location: Medford, OR
I need to. I will look into that. Im not sure why i didnt in the first place....

Dan
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FMC
Posted 2013-10-30 8:51 AM (#2029 - in reply to #1991)
Subject: Re: fuel pressure


Regular

2525
Location: Lavallette, NJ 08735
Ok, thanks much; I'll check into it. I gotta do something, as it is nearly impossible for me to get in there and see anything, let alone work on it. I don't see anything there, so I'll probably have to open her up... Makes me wonder how they work on them at all. Maybe remove the carb, repair, and re-install? Thanks,

Robert
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BigRabbitMan
Posted 2013-10-30 10:01 AM (#2030 - in reply to #2029)
Subject: Re: fuel pressure



Expert

1000100100
Location: Cottage Grove, OR

Maybe remove the carb, repair, and re-install? Thanks, Robert

This is the normal procedure to work on a carb.  Also be sure to verify the soundness of the fuel line coming to the carb from the fuel pump.

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FMC
Posted 2013-11-03 10:02 AM (#2035 - in reply to #1991)
Subject: Re: fuel pressure


Regular

2525
Location: Lavallette, NJ 08735
I will, thanks, Stephen!
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FMC
Posted 2014-09-17 4:39 PM (#2278 - in reply to #1991)
Subject: Re: fuel pressure


Regular

2525
Location: Lavallette, NJ 08735
Made access way, definitely the way to go! Replaced carb with stock (basically), and she's purrin' like a kitten again...
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BigRabbitMan
Posted 2014-09-18 9:34 AM (#2279 - in reply to #2278)
Subject: Re: fuel pressure



Expert

1000100100
Location: Cottage Grove, OR

FMC - 2014-09-17 2:39 PM Made access way, definitely the way to go! Replaced carb with stock (basically), and she's purrin' like a kitten again...

Thats good news!

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byegorge
Posted 2014-09-19 10:03 AM (#2280 - in reply to #1991)
Subject: Re: fuel pressure


Veteran

1002525
Location: Olympia, Washington
Wow! I don't know about adding an access panel to #506 that's a long time. Just happened to look at the time stamp.
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FMC
Posted 2014-09-27 2:45 PM (#2281 - in reply to #1991)
Subject: Re: fuel pressure


Regular

2525
Location: Lavallette, NJ 08735
Yes, GUILTY! My projects have a way of lingering in limbo from time to time. Anyway the access panel, itself, went well; just don't cut through your wires mounted directly below to firewall... But, unfortunately, either I spoke too soon, or simply didn't wait long enough for things to go wrong; again. The good news: she went about 70 miles under her own power yesterday (after almost 2 years idle)! The bad news: she ain't goin' nowhere at the moment...
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