| Author |
Message |
    
Anton H
Visitor
| | Posted on Tuesday, March 13, 2012 - 02:22 am: | 
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I have followed the manuals instructions for bleeding the fuel system, but don't get any fuel at the injectors. Any ideas would be great!
Thanks! |
matt_morehouse
Senior Member
Username: matt_morehouse
Post Number: 106
Registered: 12-2009
| | Posted on Tuesday, March 13, 2012 - 09:27 am: |
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Are you sure there is fuel in the tank?
That small manual fuel pump takes a lot of working to get the fuel up to the injectors. I would say ten minutes or so of pumping.
I installed an electric pump and never had another problem. I removed the manual pump and put a plate over the opening. |
gonzo
Advanced Member
Username: gonzo
Post Number: 32
Registered: 06-2011
| | Posted on Tuesday, March 13, 2012 - 08:36 pm: |
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You can also install an outboard priming bulb on the line. It works faster and easier. |
Anton H
Visitor
| | Posted on Tuesday, March 13, 2012 - 11:16 pm: |
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Thank you guys for responding! I do I have fuel at the pump, and at the filter. And when I open the bleeder screw at the injector pump plenty of pressure, as well as pressure at the the fuel return line. But no amount of cranking will get the fuel to the injectors. It had been working just fine until I ran it out of fuel... thanks again! |
matt_morehouse
Senior Member
Username: matt_morehouse
Post Number: 107
Registered: 12-2009
| | Posted on Tuesday, March 13, 2012 - 11:57 pm: |
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"Cranking" isn't going to help you just have to keep working that miserable little pump. |
Anton H
Visitor
| | Posted on Wednesday, March 14, 2012 - 12:50 am: |
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But I have pumped and pumped until it won't pump anymore, the system fully pressurized, fuel squirts out at the bleeder bolt... it is gravity feed from the small "day tank" high in the engine room, good flow at the filter and at the fuel pump mounted on the engine. Manually pumping the engine mounted pump will only pump until the pressure has built to a certain point and won't pump any more until I open the bleeder bolt at the injector pump. At first air came out, but since then just fuel sprays out. but still nothing at the injectors. |
jimdereynier
Senior Member
Username: jimdereynier
Post Number: 51
Registered: 08-2007
| | Posted on Wednesday, March 14, 2012 - 09:18 am: |
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I am out of my league with my Sabb 2H, but one of these senior members can give instructions on spray testing injectors ( follow their safety instructions-exactly). I tested mine and had to have one overhauled by a local Stanadyne dealer ( At another time I had some foreign material blocking the injector hole in the head-Sabb has cigarette looking manual "glow" plug that broke down and clogged the port.) |
matt_morehouse
Senior Member
Username: matt_morehouse
Post Number: 108
Registered: 12-2009
| | Posted on Wednesday, March 14, 2012 - 10:50 am: |
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Did you open the return line banjos and is fuel coming out? If not it might be clogged injectors but I can't imagine three clogged injectors especially when the engine was running.
I guess the next step would be to remove an injector, hook it up, crank the engine and see if it squirts. Be careful. Then either way have that injector rebuilt. |
Anton H
Visitor
| | Posted on Wednesday, March 14, 2012 - 12:30 pm: |
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I don't have fuel coming through the line to the injector(s), so removing a injector and hooking it to the line probably won't tell me anything new. I guess I will try the outboard priming ball to see if additional pressure in the fuel line might help. Other wise, there is no cut off switch or other mechanism in the system that would disable the injector pump? Not pumping = no fuel? maybe clog at the injector pump? Thanks again for your responses! |
larry_from_maryland
Senior Member
Username: larry_from_maryland
Post Number: 482
Registered: 07-2003
| | Posted on Thursday, March 15, 2012 - 08:51 am: |
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What type pump do you have?There are several things that can happen to the rotary pumps to cause your problems. |
