Stuttering at Spa?

[cantfind1]

no stuttering, and no remap.:thumbs:

Nothing to do with remap mate, its because in long sweeping right hand curves with low fuel quantity the pump on the right hand side is unable to suck fuel. simples.

[shimmy]

Good find

If you have a spare pump (like me) what else would you need and are you gonna buy the kit or just find the bits?

[azrael]

A nessecity I would say.

I remember Simpsons telling me the fuel system was a crap design for exactly this reason.

Can happen with anything from between 1/2 down to 1/4

[cantfind1]

Good find

If you have a spare pump (like me) what else would you need and are you gonna buy the kit or just find the bits?

Already spoken to Roy from CA, told him I have the pump already and he said he will sort out the rest of the bits for me.

Give him a call tomorrow Shim tell him you heard it from me.

[cantfind1]

A nessecity I would say.

I remember Simpsons telling me the fuel system was a crap design for exactly this reason.

Can happen with anything from between 1/2 down to 1/4

Completely agree!

I was getting it from just below 1/2.

Obviously depends how hard you are pushing it.

Can t wait to get this sorted as it was my biggest problem at the mo.

[azrael]

Completely agree!

I was getting it from just below 1/2.

Obviously depends how hard you are pushing it.

Can t wait to get this sorted as it was my biggest problem at the mo.

Be interested to hear your feedback. Have had lots of probs too. (Should learn my lines )

How much is fitting?

[shimmy]

Makes you wonder if the HG or oveheating issues could have been caused by lack of fuel on these types of corners

[cantfind1]

Makes you wonder if the HG or oveheating issues could have been caused by lack of fuel on these types of corners

Lots of things make me wonder.

I tend to put it down to wheel alignment rather than my shit driving!

But yes you make a good point hence why I replaced my pump, filter and regulator a while back and will soon be fitting one of these!

http://www.horsepowerfreaks.com/partdetails/HPF/Fuel/Fuel_Pump_Install_Kits/E46_M3_Walbro_In_Tank/16889

You guys owe me a drink for all this info! haha

[DuncanR]

Lots of things make me wonder.

I tend to put it down to wheel alignment rather than my shit driving!

But yes you make a good point hence why I replaced my pump, filter and regulator a while back and will soon be fitting one of these!

http://www.horsepowerfreaks.com/partdetails/HPF/Fuel/Fuel_Pump_Install_Kits/E46_M3_Walbro_In_Tank/16889

You guys owe me a drink for all this info! haha

Is there a UK supplier of those mate ?

[cantfind1]

No mate but they will ship here. just give them a bell they are very helpful.:thumbs:

[azrael]

No mate but they will ship here. just give them a bell they are very helpful.:thumbs:

What is your final solution, the second link or both links?

[cantfind1]

think I will do both to be honest, as i already have the oem pumps, so reduces the cost a lot.

[mattCSLnut]

Lots of things make me wonder.

I tend to put it down to wheel alignment rather than my shit driving!

But yes you make a good point hence why I replaced my pump, filter and regulator a while back and will soon be fitting one of these!

http://www.horsepowerfreaks.com/partdetails/HPF/Fuel/Fuel_Pump_Install_Kits/E46_M3_Walbro_In_Tank/16889

You guys owe me a drink for all this info! haha

THANX for all you info mate :thumbs: I've been having this same problem, mainly @ Brands Hatch, coming out of Clearways (180 degree right hander turn before the pit straight ) with just under half a tank of GO-GO juice and I've been getting the same misfiring in 4th & 5th + it did it again @ Bedford the other day although admittedly I was below a 1/4 of a tank of fuel. Strangely it doesn't happen @ the Ring but I guess it's because it's a flowing circuit without any 180 degree turns.
He's my appreciation :beer: token, to be cashed in near future :thumbs:

[The Gorilla]

Hi,

I have found this thread fascinating.

To address any problem you need to undestand the
cause.

The standard E46 petrol Tank pick up operates
from one side of the tank.

ie] the fuel pump is having to 'suck' the fuel
as opposed to 'push' it from one side only.

Thus when the pipe that the fuel is sucked up
to the fuel pump is not below the fuel
level, then air enters the fuel pump, fuel
pressure drops and the spluttering on
heavy cornering on 1/4 tank can and does
occur.

As the standard fuel pump is rated for 5 bar then
its only issue is fuel supply and what its pick
up is, ie] what distance away from the pump
will it still suck up fuel.

So, if you had a short length of rubber fuel hose
fitted to the bottom of the existing fuel pick
up, then a 'T' fitting, and then another length of fuel hose
to the other side of the tank, which would be no more
that about 1.0 mtr in length, you would ensure that
the fuel pump was always able to suck up fuel,
which is the cause of the problem.

Although this is all internal to the tank, access via
the existing pump set up would be quite easy, and
you have to remove this to fit the CA solution
anyway..

The CA fix just creates another part that can go
wrong, adds more weight !!!!!! and the same
results can be acheived a lot simplier and a whole
lot cheaper.

Regards,

The Gorilla.

[shimmy]

So Gorilla you are basically saying keep the OEM set up but increase the chances of continuous fuel pick up by lengthening the pick up pipe and give it two outlets, one either side of the tank

Nice and simple but surely if either of these open ends is pulling air, you will have spluttering!