Quick confirm of fuel pump - Page 6

bibledriver · 6th July 2012, 17:17

Do it. I will read it! I should have looked there, but I just figured, Meh, I'm off today and I'll just go grab the fuse card and come back inside . . . oops. On that, your fuse card say GB on the little tab on the bottom or no?

rao · 6th July 2012, 17:25

Joe I am glad we got your car running so easily.

Quote:

Originally Posted by Sailor24

What we really need is a good thread on how to use the WDS. It is not always 100% and it is hard to use and easy to read the wrong diagram but it is better than nothing. Even if all you do is browse it and read the info parts of it, it will help. I did see it as being the hardest diagrams I have had to use, but once I got the hang of it they are the quickest and most informative set.
I would love to do a DIY on the way to use it but I just don't have the time.

Tell people that BMW buried its secret oil info in the WDS and everyone will learn how to use it overnight

It is an incredible resource available for free so people naturally just ignore it

It is not that hard; it just takes a little practice. If you can't figure out how to use the WDS you probably shouldn't be working on the electrical system in the first place

JoeFromPA · 6th July 2012, 18:56

Quote:

Originally Posted by rao

It is not that hard; it just takes a little practice. If you can't figure out how to use the WDS you probably shouldn't be working on the electrical system in the first place

Drove it 35 miles into work today and drove great. Pretty sure I made up my mind to replace the pump after all - I'm going to own this car for another 40k miles. The likelihood of failure, and the likelihood of that failure occuring at an inopportune time, is not insubstantial.

Further, I appear to have some form of electrical excess draw - may be coincidental, but it's doubtful, and I know the PO and myself have "abused" the fuel pump by way of running it in very low fuel levels.

I have considered, and may still, try to determine the current being drawn by the fuel pump. But to do it appropriately involves 2 people and more free time than I will admit to having

Hopefully I don't get into this habit with this car....

rao · 6th July 2012, 19:01

You guys are endlessly entertaining

. I never allow my tank to be above 3/4 or below 1/2. You can't be too careful

bibledriver · 6th July 2012, 19:40

^^^but don't shut it off either, so fill up to 3/4 before bed!

Quote:

Originally Posted by JoeFromPA

Drove it 35 miles into work today and drove great. Pretty sure I made up my mind to replace the pump after all - I'm going to own this car for another 40k miles. The likelihood of failure, and the likelihood of that failure occuring at an inopportune time, is not insubstantial.

Further, I appear to have some form of electrical excess draw - may be coincidental, but it's doubtful, and I know the PO and myself have "abused" the fuel pump by way of running it in very low fuel levels.

I have considered, and may still, try to determine the current being drawn by the fuel pump. But to do it appropriately involves 2 people and more free time than I will admit to having

Hopefully I don't get into this habit with this car....

Measure the draw - turn your multimeter you bought to the amperage setting, remove new fuel filter relay, put the pins to the mulitmeter into the same sockets you would to jump it per recent thread, and read the amperage.

I am pretty sure that there is nothing (more than negligible) that is running on that circuit but the fuel pump. So my thoughts are if it is excessive and blowing fuses, change pump. But again, change filter first and if you measure before and after we will all gain from your findings.

.02

JoeFromPA · 6th July 2012, 19:44

Bibledriver - Just curious, would the fuel pump be drawing excess current when the car is off and the pump is running continuously in some form of similar relationship as it would be when the car is running and the pump is running PWM-style as dicated by the ECU?

I would think:

A. The pump would be drawing extra current running continuously to maintain pressure when the output side is shut (injectors) and not draining pressure
B. That the current drawn with the car off would not be comparable since it's not getting a pulse-width modulated signal anyway and just getting straight power

If I'm wrong, dude, I'll totally measure draw from the fuel pump relay with the car off before and after a fuel filter change. But since I wouldn't expect any fuel to actively be moving through the filter with the car off even with the pump running, I'm not sure exactly why I'd expect a difference either...

JoeFromPA · 6th July 2012, 19:45

Quote:

Originally Posted by rao

You guys are endlessly entertaining

. I never allow my tank to be above 3/4 or below 1/2. You can't be too careful

Rao, you act as if you drive your car with no worries and that you sleep well at night.

What's your secret

rao · 6th July 2012, 19:48

I would never actually drive my car

you know that.

JoeFromPA · 6th July 2012, 19:52

I've seen video that testifies otherwise, as well as an affidavit by a gentleman claiming to have slammed his knees into your dash when you throttle LIFTED.

rao · 6th July 2012, 20:04

Lies, all lies. I would never lift off of the throttle, because I would never actually use the throttle - can you imagine the engine wear that could cause