E46 M3 Fuel Starvation kit - what’s proper fuel pump clocked position?

[bigjae46]

Nice! This almost motivates me to mess with mine but I'm still comfortable with admitting failure on this.

[jcor3968]

Does anyone happen to have this kit laying around or have easy access to their car and be able to check what resistance resistor that Bimmer world adds to the driver side fuel pump assembly is? my car has an older kit, and I’m trying to get the fuel level working correctly, and I see that the world has added a resistor in the description of the listing.

Many thanks!

[Andykx213]

Does anyone happen to have this kit laying around or have easy access to their car and be able to check what resistance resistor that Bimmer world adds to the driver side fuel pump assembly is? my car has an older kit, and I’m trying to get the fuel level working correctly, and I see that the world has added a resistor in the description of the listing.

Many thanks!

Also curious about this. I just bought the car not knowing it had this fuel kit, and it ran out of fuel while the gauge showed a quarter tank. I took it out and reorientated it, and it reads better, but it takes 10-15miles before the gauge actually moves after filling up. I reclocked it again the same way in the other pictures, so we shall see if that fixes it, or if I need to get a new wire

[BCEXP]

Was the factory setup not adequate (serious question, not being a smart ass)?

[bigjae46]

Was the factory setup not adequate (serious question, not being a smart ass)?

I've seen mixed results. My buddy can run his car down to less than 1/8 of a tank. I could maybe get to a 1/4 tank before spending $700 replicating the $300 Bimmerworld fuel starvation kit. Yes, you read that right. It took awhile but I can now laugh about it.

Now I can get it about 3/16. It could be better but I have no need to run the tank lower. I need the weight for my time trial class.

[uberchris]

Was the factory setup not adequate (serious question, not being a smart ass)?

Seems like it depends on a lot of factors; which track you are driving, how fast you are, what tires, etc. For me with 200TW tires, my car would die while going up the hill at turn 9 of The Ridge at or below 1/4 tank.

[BCEXP]

I've seen mixed results. My buddy can run his car down to less than 1/8 of a tank. I could maybe get to a 1/4 tank before spending $700 replicating the $300 Bimmerworld fuel starvation kit. Yes, you read that right. It took awhile but I can now laugh about it.

Now I can get it about 3/16. It could be better but I have no need to run the tank lower. I need the weight for my time trial class.

Haha, oh ok, gotcha. Thanks for the insight. Fuel level always concerned me with these cars.

[bigjae46]

Haha, oh ok, gotcha. Thanks for the insight. Fuel level always concerned me with these cars.

And 3/16s with a long, fast almost 270 sweeping turn which has to be the worst turn for fuel starvation except for maybe T16-18 at COTA. All the fuel gets pushed to the driver's side so you are really leaning on the left side pump to push fuel back to the right side.

[OldRanger]

Hi Folks,
I'm installing one of these kits into our 2002 after running into fuel starvation issues at VIR on Turn .1 It's probably around 200 degrees depending on your line - and tracking out under power takes a bit of time.

Our 2005 doesn't have an issue, even below 1/3 tank. But, the 2002 didn't seem nearly so tolerant - not sure why. I mention that because it jives with the unpredictability others have mentioned.

Question: when installing fuel return line - what measures did you take to accommodate the additional length required to join the OE line to the tank nipple?

1. Did you unclip the blue line from the retaining clip on the front of the tank?
2. Did you cut any portion of the nipple on the pump?
3. Did it require much force to deform the OE line, forcing things to fit?
4. Did anyone buy a longer length of hose to loop it?

[Obioban]

Our 2005 doesn't have an issue, even below 1/3 tank. But, the 2002 didn't seem nearly so tolerant - not sure why. I mention that because it jives with the unpredictability others have mentioned.

That's an interesting data point.

This has never bothered me so long as I keep it above 1/4 tank, so I've never done anything about it. But, my car is a 2005-- you have me wondering if there was a change at some point that made this less of an issue.

[OldRanger]

That's an interesting data point.

This has never bothered me so long as I keep it above 1/4 tank, so I've never done anything about it. But, my car is a 2005-- you have me wondering if there was a change at some point that made this less of an issue.

Right, the 2005 can still pull on track with 1/4 tank.

Our 2002 gave up on me - I literally ran out of gas trying to figure out what was happening. I was using the interior roads at VIR to assess the situation. I pulled off track with a gauge showing 2/3 - and stalled on the way back to the paddock. The engine would not start. I later determined that there were 4 gallons in the tank (somewhere). I could only add 12.5 total to fill the 16.6 gallon tank.

My conclusion is 1) the gauge was failing, the track duty probably killed it with the sloshing…as well as 2) something caused the suction pump to fail. Two failures at once.

PS: part numbers are the same between model years per realoem.

[Pklauser]

I bet you have a bad suction pump. Clip probably failed and it fell off. Same thing just happened to me.

More info: https://nam3forum.com/forums/forum/m...ading-1-4-full

[bigjae46]

I want to say I replaced that entire line. IIRC, I also dropped the fuel tank.

I've been wondering about this from Radium Fuel Pump Hanger, BMW E46 . The stupid plastic hose barbs will break off at some point.

Anyone tried this?