engine and drivetrain Help Needed for Slide Throttle Injection issues

[bmw02rally]

Guys,

Help before I take to it with a hammer!!!

I have recently purchased a competition engine that came with a Slide throttle injection setup and a modified Kugelfischer pump. I am ready to start her up but I can't seem to get any fuel to the injectors.

There is plenty of fuel flowing through the Kugelfischer pump but there doesn't seem to be any fuel being pulsed out of the outlets. I know it won't be much but I would expect some. As you can see from the pics the injectors are on the trumpet side so its easy to see where the fuel should be coming out.

Any ideas before I sell it and put some 48 Webers on instead??

Regards

Mark

[_z_]

that certainly looks pretty cool!

Say what fuel pump setup are you using to feed the Kugelfisher? It should be at 2 bar going into the pump.. you might not be feeding enough to pressure up to the 35 to 38 bar needed by the injectors ??? Like if there isn't enough pressure (due to lack of fuel volume or pressure to the KF) to cause the injectors to open that might explain it ??

just guessing

[BillWilliams]

K pump.

DId you do those? It describes how to check the suction valves and the pressure coming from the pump.

Check out the tii manual that is on-line and then check back.

Is the belt on the K pump turning the cam on the pump?

[Marty]

Your pump may not be making enough presure with just cranking RPMs to crack the injectors, you might try a few CCs of fuel in each trumpet while cranking just to get her to light off.

[Lee]

Most of the times, the problem encountered when starting an engine with Kugelfisher that has not worked for a long time is that seals have dried and fuel escapes from the 4 top seals. You did not mention it, which makes me think that there might not even be any fuel in the pump.

First, make sure that the electric pump works properly and brings fuel to the Kugelfisher. The Kugelfisher will then mechanically compress it thru each of the four small pistons. I doubt that all four injectors are clogged. If theyr were, then fuel would leak from the four seals on top.

Go back to basics, and floow the route that fuel takes. Step by step. Starting at the fuel tank. and make sure every step works fine before you go to the next.

[m20ohtwo]

I wish i was lucky enough to have those problems.

[NickVyse]

I'd vote not enough fuel pressure to the pump also - didn't you have carbs before and if so are you using the same fuel pump?

[bmw02rally]

Thanks for the replies guys.

It was running on carbs before but now I have a Facet red top pump feeding a Swirl Pot. Then that feeds a Sytec competition Electric injection pump which shot fuel 30 foot across the workshop from the pipe feeding the Kugelfischer. Then the return is feeding back to the Swirl pot which again is flowing fuel. If I take off the four seals on top I get a small amount of fuel? I can also see fuel in the injector pipes but it doesn't seem enough?

If it is blocked injectors would a blow through with an airine sort it or would that wreck them?

[ray_]

Thanks for the replies guys.

It was running on carbs before but now I have a Facet red top pump feeding a Swirl Pot. Then that feeds a Sytec competition Electric injection pump which shot fuel 30 foot across the workshop from the pipe feeding the Kugelfischer. Then the return is feeding back to the Swirl pot which again is flowing fuel. If I take off the four seals on top I get a small amount of fuel? I can also see fuel in the injector pipes but it doesn't seem enough?

If it is blocked injectors would a blow through with an airine sort it or would that wreck them?

Those injectors ain't gonna open at <2 bar. I doubt they are blocked, esp all 4. Do what Bill said and report back.

http://www.thetiiregister.com/

Cheers,

Ray

[BillWilliams]

The K-pump needs 2 bar to sustain performance under load.

The K-pump will allow the car to idle and run with about half that. I have a fuel pressure guage on my car and on two different occasions, one a clogged fuel filter and the other a failing electric fuel pump, and the car idled and ran with 18-22 psi. Stumbled under hard acceleration though.

The K-pump generates the incredible pressure 450-500 psi, forgot the bar measurement. So if the fuel is getting to the pump, which he indicates it is, the electric fuel pump can fill the fuel lines but if all four injectors are not popping open, I suspect the pump is not turning.

Check the cogged belt is engaged on both pullies and that the pulley on the pump is engaged on the shaft and secured with the wodruf key and nut.

British American Transfer in somewhere Florida, has fittings and AN line if you want an alternative to the plastic fuel lines you have connected together.

[bmw02rally]

Thanks Bill,

After more fiddling today we have fuel out of number four injector and I can see fuel pumping healthly up the other pipes. I suspect I have some issues in my Swirl pot setup though as the injection pump is getting extremely hot and making a funny noise, not good!!

I have the cover off and the belt is turning the pump. I think the Injection pump is so powerful it is draining the Pot before the facet normal pump is filling. I do however have the injection return flowing into the pot which I thought would overcome this. So I'm a bit confused.

How about the pressure relief valve in the back of the KF? Does it stick?

I failed to mention that it doesn't have a warm up unit and I have a large cannister fuel filter and profuel regulator which is open full.

I love petrol issues especially when the battery is next to all the fuel pressure items, NOT!!!!!

Why don't I stick to skiing same thrills less technology........

[_z_]

I suspect I have some issues in my Swirl pot setup though as the injection pump is getting extremely hot and making a funny noise, not good!!

ack the KF is getting hot? you getting oil to that thing?

[bmw02rally]

No, that's fine.

The electric injection pump is getting hot.....

[_z_]

No, that's fine.

The electric injection pump is getting hot.....

oh good. had me worried there for a sec

[Marty]

Consider this, by sending the return fuel into the swirl pot you are in effect pressurizing the input to the fuel injection electric pump so that its getting fuel under pressure to the inlet and then the F.I electric pump is trying to add its 30 psi to that and that is making it work to hard and its over heating. try running the fuel return to the fuel tank, if your low pressure pump was supplying the engine with Weber's it will supply the swirl pot with enough fuel to run the K-Fish.