BMW N42 318i E46 Idling Problem And Bad Fuel Consumption




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hanynowsky: You have three different problems:
1- A vaccum leak which is responsible for the erratic idle RPM adjustment. You need to perform a compression test and leak-down test on each cylinder, plus a smoke test to be able to spot where the vacuum leak is.
2- CCV, must be cleansed, especially the return hose.
3- The valvetronic system is work or the timing chain has slipped and jumped on tooth or two. Sometimes it slips 180 degrees.

That is typical for N42 and N46.

hanynowsky: CCV and/or MAF. Definitely.

DEEJAY FIFTY: It is caused by the valve mate I had the same problem and bmw done it for me and they said it was the valve

dhalsim1: Could be so many things causing bad idle.
Get the codes read!

lnr243: timig chain and tensioner resolves this

Gray Wolf: So after you changed oil seperator your fuel consumption was better? I have same problem

Erastus Marugu: Idling problem: Check vacuum hose going to the CCV(PCV). Rattle: check VANOS

R10: i got the same, changed maf, ccv, vacuumhoses, disa, still got it, what could it be?
bad lamda should show a code? thinking about leak exhaust somewhere or fuelfilter but check it later

147NITRO: I have 2002 E46 318Ti and on computer it shows me 20L/100km ...

vaah: If you haven't already, i'd try the timing chain tensioner.

John K: Common problem for these. You see the hose just above the intake manifold. Well that is connected to a breather, which gets filled with oil and blocks up. If your doing job by yourself, then best to take the intake manifold off. Crappy job. There are 2 Torx that you have to get from underneath.

Niccolai: I have a 2002 325i. I think we have the same problem right now.. whining/high pitched tone near my brake fluid reservoir.. even on idle or when running.. still haven't figured out on what's causing it.. anyone here that would know? :/

Niccolai: I have a 2002 325i. I think we have the same problem right now.. whining/high pitched tone near my brake fluid reservoir.. even on idle or when running.. still haven't figured out on what's causing it.. anyone here that would know? :/

Kim-Quang Chhor: Hi guy! Did you solve your problem???

Joel Rodriguez: CHEEK UR VANOS SOLENOID!!! IT SOUNDS LIKE A RATLE SNAKE SO UR VANOS PROBABLY NEEDS A RUBER SEAL.LOOK IT UP ON YOU TUBE. GOOD LUCK

Darwin Rodas: I wanna say start with the fuel fillter and than procssed to the next one

Mark Vidooka: I got my mass air flow changed and it made my car brand new

42turk42: My 2002 318ci also has a pretty bad fuel consumption. How to solve this?

TitoDre: Sonda lambda.

Jo Thompson: Mine did the same thing.! And wouldnt start one morning. How do I fix my peice of crap 2010 325i.?!?!?!
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BMW N42 318i E46 Idling Problem and bad fuel consumption