Ran out of gas now car won't start

[1980c10]

Hi, I have a '95 750il v12. I accidentally ran it out of gas the other night and now it won't run. I put 2 gallons of gas in it, cycled the key a few times to prime everything. Then started it, it started and ran normal for about 10 seconds then began to idle very rough and would not take throttle input, as if it didn't have enough gas in it. So I put 2 more gallons in and repeated. Same exact thing, ran normal for about 10 seconds the started idling rough and wouldn't take throttle. I did this about 4 more times to see if it would come out of it. It didn't, then the 5th time it wouldn't start at all and still won't, just rolls and rolls. Doesn't even hit.

Now I have a few questions. Is this car a return less fuel system? If so could it just be air locked? Where is the schrader valve located to check fuel pressure? If the pumps turn out to be burnt up, can I just make a in tank pickup system to convert it from dual in tank pumps to a single inline 255lph pump. Or is there some system on the car that would prevent me from doing this?

[dantheman67]

Sounds like you killed the fuel pump. Hook up a fuel pressure test gauge to the feed line and check to see if it is within spec

[ihsnshaik]

Sounds like you killed the fuel pump. Hook up a fuel pressure test gauge to the feed line and check to see if it is within spec

this. I always tell my friends and family when the light comes on it means fill the tank and not drive it till there is 5 miles left.

[1980c10]

Where is the feed line located on the v12

[TheLadiesMan]

Maybe you sucked up crap in the tank. Pull the pump. it's under the passenger side rear seat. Make sure you have a few hose claps handy. BMW used one time use clamps. SLOWLY remove the hose; it's under pressure and all the gas in the system will rush out. You can clean out the pump filter with carb/throttle cleaner or WD-40... I can't remember what I used.

[purplecty]

Maybe you need gas! ;)

[AlexDj]

Fuel filter

[1980c10]

Well it's not either fuse or the relay. I will check the filter and pumps tomorrow. But that's what I was thinking is maybe I sucked some crap up when it was super low.

I have a video of what it's doing but I can't post it yet.

[pizzaman09]

Fuel filter

I bet this. Once you get to the bottom of a tank you can pick up all the crud that has been floating around in the tank for the last 11+ years. Check to see if your filter is clogged.

It sounds to me that you are not getting fuel to the engine obviously. The first 4 times it fired was probably residual fuel left in the lines or possibly the tiny bit that made it past the filter.

[TheLadiesMan]

Try the pump filter first, that method is free.

[1980c10]

Thanks guys. I will pull inspect and clean the pumps and socks, also I'll put a new fuel filter on it.

I'm putting head gaskets on my truck ATM so the 7 is kinda on the back burner until I get that knocked out.

[Chief Jimbo]

Did you try some starter fluid in the intakes to see if it would start up for a sec?

[DUDMD]

this. I always tell my friends and family when the light comes on it means fill the tank and not drive it till there is 5 miles left.
I drive past 0 range sometimes, and never ran out of gas yet.

[Fredsta170]

DUDMD

sorry to hear that hope its nothing major.

[DUDMD]

DUDMD

sorry to hear that hope its nothing major.
Never had an issue with mine, 216k on the clock, runs perfect.

[Silver740ILL]

Did you try some starter fluid in the intakes to see if it would start up for a sec?

Try this next.

[iDreadnaught]

We have 22 gallon tanks right? I've run it down until it said I had about 5 miles remaining to get all the ethanol fuel out and filled it up with 20.8 gallons..

[E38740iMD]

My gas lights on every day.. I ran out of gas I n the 10 days ago. But all was good. I need another car :(