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Home > Help Needed / General Tech Chat > fuel regulator problem/, Maybe fuel pump?? 04/03/11

stevieturbo

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Northern Ireland

4th Mar, 2011 at 07:46:59pm

So what fuel pressure is it going down to ?

9.85 @ 145mph
202mph standing mile
speed didn't kill me, but taxation probably will


cossierick

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wakefield West Yorks

5th Mar, 2011 at 04:07:57pm

Right, fuel pressure at the pump is 5bar and climing? (the fookin gauge was leaking i borrowed)

I didnt get a reading at the carb end but its not far off pump.

Numbers on the pump are. part no 4500270 gsl 391

Im going to do som digging myself when i get back in.

Do we think the pump could have too much pressure for the reg to cope with??

rick

Turbo Phil

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Lake District

5th Mar, 2011 at 05:58:39pm

On 5th Mar, 2011 cossierick said:
Do we think the pump could have too much pressure for the reg to cope with??

rick


I had this once. I used a pump from a Jag & it killed my reg.

WWW.TURBO-MINI.COM


stevieturbo

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Member #: 655
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Northern Ireland

5th Mar, 2011 at 08:12:35pm



On 5th Mar, 2011 cossierick said:
Right, fuel pressure at the pump is 5bar and climing? (the fookin gauge was leaking i borrowed)

I didnt get a reading at the carb end but its not far off pump.

Numbers on the pump are. part no 4500270 gsl 391

Im going to do som digging myself when i get back in.

Do we think the pump could have too much pressure for the reg to cope with??

rick


If fuel pressure at the pump is 5 bar, then there is a massive blockage somewhere. The pump is effectively trying to pump against a dead end

The pump IS NOT the problem. Unless there is a restriction or blockage, the pump will not generate any pressure. And clearly you have a massive blockage.

Although why are you using a gauge with such a scale for checking fuel pressure which will only be circa 0.3 bar ?

9.85 @ 145mph
202mph standing mile
speed didn't kill me, but taxation probably will


cossierick

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wakefield West Yorks

5th Mar, 2011 at 08:18:02pm

Yes i understand what your saying, the reading was taken just before where the pipe goes into the reg. So i must have a blockage somewhere in the line??
The reason for using a big guage is its bust my gunson lo gauge i used for checking pressure into the carb and just wanted to check what the pump was doing.

rick


On 5th Mar, 2011 stevieturbo said:

On 5th Mar, 2011 cossierick said:
Right, fuel pressure at the pump is 5bar and climing? (the fookin gauge was leaking i borrowed)

I didnt get a reading at the carb end but its not far off pump.

Numbers on the pump are. part no 4500270 gsl 391

Im going to do som digging myself when i get back in.

Do we think the pump could have too much pressure for the reg to cope with??

rick


If fuel pressure at the pump is 5 bar, then there is a massive blockage somewhere. The pump is effectively trying to pump against a dead end

The pump IS NOT the problem. Unless there is a restriction or blockage, the pump will not generate any pressure. And clearly you have a massive blockage.

Although why are you using a gauge with such a scale for checking fuel pressure which will only be circa 0.3 bar ?

stevieturbo

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Member #: 655
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Northern Ireland

6th Mar, 2011 at 11:54:57am

Make it easy for yourself and take it one step at a time, although this really shouldnt be difficult.

leave the pump installed as it is.

Remove the FPR, and get a big container to catch fuel.

test using as much hose installed in the car as you can unless mentioned otherwise.

1. pump-hose-teed gauge-hose to container. NO FPR at this stage

You may see a little pressure on the gauge, but minimal.

2. Pump-hose-tee'd gauge-FPR, then FPR return into an open container. Ensure adjusting screw fully open.

Once again, you should see a minimal pressure. Ensure that the FPR outlet to the carburettor is blocked off. Or you can actually use that port for the gauge.
As this is the pressure the needle valve will see.

If you are still seeing increasing pressure, then try squeezing up the feed line to the FPR, although you really shouldnt be having a problem

The above tests are NOT using a return line installed on the vehicle. Just an open 8-10mm hose that you can clearly see has no restrictions

9.85 @ 145mph
202mph standing mile
speed didn't kill me, but taxation probably will

Home > Help Needed / General Tech Chat > fuel regulator problem/, Maybe fuel pump?? 04/03/11
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