i have very large fuel cunsomption with no eror codes
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Look for vacuum leaks.
i cheked the vacuum with smoke. there is no leaks
We found a vacuum leak athe booster for the brakes and the smoke came out from under the dash when we did the smoke test
Leak in fuel system? Smell of gas when parked, wet stain on the ground?
Someone siphoning gas from the car when you're not around? Watch the gage when you shut down and when you next start.
Smell of gas at idle? Walk slowly around the car sniffing for it, down low too, not in a windy place.
Leaking fuel line when under pressure? Look under the hood and under the car at idle, check pressure at fuel rail after shutoff.
Stuck pressure valve, check fuel pressure at idle and at higher rpm.
And the number one thing: what have you done to the car lately that has had anything to do with the fuel system? Mechanic's rule, y'know...
Last edited by Honolulu; 02-09-2018 at 03:13 AM.
Charlie
Your mission, should you decide to accept it, is to add value to these threads, either by pictures or by descriptions, so the next person with the same or similar problem stands on your shoulders.
fuel does not go out nowhere... i cleaned injeqtors, changed fuel filter, air filter. the fuel pressure is abaut 3.5 bar (50psi)
You probably have a vacuum leak. Smoke tests aren’t always accurate. They perform that test under very low pressure. I’ve had situations where there was a split in the intake boot and it didn’t show any smoke but the high vacuum when the car was running was enough to cause thT split to open and allow lots of air to get in. Most likely culprit is the inner intake boot
Bleed your cooling system http://forums.bimmerforums.com/forum....php?t=1709482The ULTIMATE OEM Alarm/Keyless thread http://forums.bimmerforums.com/forum....php?t=1792200
Bank 1 only, I assume?
That should narrow down the leak locations to be bank specific.
in smoke test presuure was 3 bar and the intake was holding the pressure
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