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Seemingly excessive fuel consumption X1 N46 engine
13-09-2019, 07:12 AM,
Post: #11
RE: Seemingly excessive fuel consumption X1 N46 engine
(12-09-2019, 11:40 AM)Florissilfhout Wrote:  I'm thinking in the other direction:
Does the car coast OK? Maybe the brakes are not disengaging fully or maybe there is some other form of increased drag (tires, wheel bearings, internal resistance in the gearbox, differential, etc.).

Something to check when you're done checking the exhaust  wink2

Good lead. Will go through these too
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13-09-2019, 10:34 AM,
Post: #12
RE: Seemingly excessive fuel consumption X1 N46 engine
Have you tried running a VANOS system test using ISTA? Check the operation of the VALVETRONIK. Many cars with this engine have problems in these systems without recording errors.
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[+] 1 user says Thank You to Owl1975 for this post
01-11-2019, 13:55 PM,
Post: #13
RE: Seemingly excessive fuel consumption X1 N46 engine
(13-09-2019, 10:34 AM)Owl1975 Wrote:  Have you tried running a VANOS system test using ISTA? Check the operation of the VALVETRONIK. Many cars with this engine have problems in these systems without recording errors.

Strangely it threw a valvetronic fault once and it cleared itself!!! Valvetronic seems to work ok but the word is "seems". Ill check it out.
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