![]() |
|
|
|
Registered
Join Date: Jan 2004
Location: CT
Posts: 11,565
|
Help - RSR Clone Won't Start - No Fuel
I'm trying to run my RSR clone once each month over the winter. I started it the day after Christmas and took it for a nice run. No problems.
This week I can't get it started. I let the pump run for a minute or so, pump the gas 3 or 4 times. The engine tries to fire, but it will not sustain. I look at the sight glass on the PMO float bowls and see no signs of fuel in the bowls. As I move the throttle linkage, I see no signs of the fuel jet from the accelerator pump. When I disconnect the fuel line to the carbs and run the pump I get plenty of fuel flow from the pump. When I try to blow into the line leading to the carbs, I get no flow as if the float needle valves are closed. I don't have a lot of experience with carbs but it seems as if the bowls are empty and the needle valves are closed preventing fuel from entering the carbs on both sides of the engine. Any experienced help or suggestions will be appreciated.
__________________
Tom Butler 1973 RSR Clone 1970 911E 914-6 GT Recreation in Process |
||
![]() |
|
Insert Tag Line HERE.....
|
Tom, if you could, post a picture of the fuel inlet side of the carbs. Its been awhile since ive been into PMOs, or Webers, but it seems odd that both sides of your carbs (left and right bank) are giving you the same problem. But the fuel inlet houses a needle-in-seat valve which is attached to the floats. As the floats rise up, -when the fuel bowls fill up with fuel-, then the needle closes the inlet off until the fuel is used, the level is dropped, and the cycle starts over again.
You can try tapping lightly on the inlets to break them free, as old gas can cause them to stick, and that might work, or you can simply take the inlets off and clean them out. Nothing will come "undone" by doing that. Let us know..
__________________
Marc |
||
![]() |
|
Author of "101 Projects"
|
You probably pegged it - either someone put some small ball bearings in your fuel hose, or your needle valves are stuck closed from old fuel. Try tapping on the side of the carbs near the valves lightly with a plastic hammer...
-Wayne
__________________
Wayne R. Dempsey, Founder, Pelican Parts Inc., and Author of: 101 Projects for Your BMW 3-Series • 101 Projects for Your Porsche 911 • How to Rebuild & Modify Porsche 911 Engines • 101 Projects for Your Porsche Boxster & Cayman • 101 Projects for Your Porsche 996 / 997 • SPEED READ: Porsche 911 Check out our new site: Dempsey Motorsports |
||
![]() |
|
Registered
Join Date: Jan 2004
Location: CT
Posts: 11,565
|
I agree with Rattlesnake that it would be odd to have the same problem happen in both carbs. The car started and ran fine around Dec 26 and then sat for a month before I tried to start it again. Everything is brand new, fuel cell, fuel pump, lines , filters and PMO's. I hate to take the carbs apart.
However, unless the bowls are full, I should be able to blow into the inlet lines to the carbs. Am I correct on that assumption? I'll try to free up the needle valves as Wayne and Rattlesnake have suggested and will report back..
__________________
Tom Butler 1973 RSR Clone 1970 911E 914-6 GT Recreation in Process |
||
![]() |
|
Registered
Join Date: May 2001
Location: Peoples Republic of Long Beach, NY
Posts: 21,140
|
Re: Help - RSR Clone Won't Start - No Fuel
Quote:
Dead head regulator designs can clog.
__________________
Ronin LB '77 911s 2.7 PMO E 8.5 SSI Monty MSD JPI w x6 |
||
![]() |
|
Registered
Join Date: Jan 2004
Location: CT
Posts: 11,565
|
Well she's purring away in the garage as we speak warming up for a short run.
Disconnected the fuel line to the carbs tapped on both fuel rails with my rubber mallet. Then I blow through the inlet lines and I get through flow. Button the lines back on and exercise the throttle, and fuel spays from the accelerator pump. Car then starts on first try. So now the question...What would cause the needle valves to stick and how do I present it in the future? Thanks a million to Wayne and Rattlesnake.
__________________
Tom Butler 1973 RSR Clone 1970 911E 914-6 GT Recreation in Process |
||
![]() |
|
![]() |
Registered
Join Date: Nov 2004
Location: Sharpsburg, Ga.
Posts: 154
|
rsr
Glad to hear you got her running.. I would think just some old fuel sitting.. when I am parking my 66 911, boat etc.. for extended periods I mix in sta bil and it seems to prevent sticky issues... not sure if its the "recommended" solution but it has worked for me..
david
__________________
David Brunson Sharpsburg, Ga 1966 #300720 sold |
||
![]() |
|
Registered
Join Date: Jan 2000
Location: St. Charles, MO
Posts: 1,925
|
Quote:
Last edited by abisel; 02-04-2006 at 05:33 AM.. |
||
![]() |
|
Registered
Join Date: Jan 2004
Location: CT
Posts: 11,565
|
Since I plan to take it out for a run once a month over the winter, I think I'll go with the fuel stabilizer.
BTW...Spent the last couple of hour chasing around the back roads here in CT. Boy do I love this car!!!
__________________
Tom Butler 1973 RSR Clone 1970 911E 914-6 GT Recreation in Process |
||
![]() |
|
Registered
Join Date: Nov 2004
Location: Sharpsburg, Ga.
Posts: 154
|
rsr
I probably missed them but do you have any pics.. dont forget the engine room.. thanks...
david
__________________
David Brunson Sharpsburg, Ga 1966 #300720 sold |
||
![]() |
|
Registered
Join Date: Jan 2004
Location: CT
Posts: 11,565
|
Here's some pics
Another RSR Clone Project - Before & After Another RSR Clone Project - Dyno Day Another RSR Clone Project-Track Day
__________________
Tom Butler 1973 RSR Clone 1970 911E 914-6 GT Recreation in Process |
||
![]() |
|
Registered
Join Date: Nov 2004
Location: Sharpsburg, Ga.
Posts: 154
|
rsr
Hi,
thanks, I remember your car now.. great shots. anxiously awaiting the spring thaw.. david
__________________
David Brunson Sharpsburg, Ga 1966 #300720 sold |
||
![]() |
|
Registered
Join Date: Dec 2001
Location: MA USA
Posts: 2,938
|
Gasoline nowadays doesn't seem to have a long shelf life, even with stabalizer added. EFI would cure sticky needle valves
![]() Dean
__________________
Dean 911 SC turbo, 3.0L 930 motor, G50, 930 brakes, DTA EFI, 352 RWHP DynoDynamic dyno, |
||
![]() |
|
Registered
Join Date: Jan 2004
Location: CT
Posts: 11,565
|
Quote:
__________________
Tom Butler 1973 RSR Clone 1970 911E 914-6 GT Recreation in Process |
||
![]() |
|
Registered
Join Date: Dec 2001
Location: MA USA
Posts: 2,938
|
Yep that is what I mean.
Dean
__________________
Dean 911 SC turbo, 3.0L 930 motor, G50, 930 brakes, DTA EFI, 352 RWHP DynoDynamic dyno, |
||
![]() |
|
Registered
Join Date: May 2001
Location: Peoples Republic of Long Beach, NY
Posts: 21,140
|
I've never seen a stuck closed needle into the seat and I've seen plenty of gummed up carbs. Stuck open is another story.
whatever
__________________
Ronin LB '77 911s 2.7 PMO E 8.5 SSI Monty MSD JPI w x6 |
||
![]() |
|
Registered
Join Date: Jan 2002
Location: Austin, TX
Posts: 298
|
Tom,
Did you have those wheels made?
__________________
1973 911T Sepia Brown MFI 1986 Carrera Meteor Gray Metallic |
||
![]() |
|