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Tech Forum : Extreme fuel consumption

- BMW E21 Community
   - Tech Forum
      - Extreme fuel consumption
  Posted Saturday, Jan 8th 8:30pm [Edit] [Quote] [IMS] [View car]

Post nr. 217


I don't know what to do, the fuel consumption in my car is very very high. 73km with a little more than a quarter tank. I have th M20 with 4A1 carb. What can I do to solve this without changing the car or anything like it? It as expensive as taking a cab!

Thanks,

Konrad.

  Posted Saturday, Jan 8th 10:47pm [Edit] [Quote] [IMS] [View car]

Post nr. 138


Check the carb adjustment, choke operation.
Check timing adjustment.

Do you have the access to CO mashine and timing light?

Max

  Posted Saturday, Jan 8th 11:13pm [Edit] [Quote] [IMS] [View car]

Post nr. 218


No..sadly I don't

  Posted Sunday, Jan 9th 2:14am [Edit] [Quote] [IMS] [View car]

Post nr. 245


Someone help, I want to know how this is done with carbs.

  Posted Sunday, Jan 9th 11:11am [Edit] [Quote] [IMS] [View car]

Post nr. 58


My fuel consumption is higher than that. I probably (probably, because my odo/trip meter is not working) get about 160-180 km on a full tank. Probably due mainly to my heavy right foot. Also, 90%+ of my driving is in town. With the AC on as well.

Also have a small crack in my fuel tank. That does not help.

  Posted Sunday, Jan 9th 1:12pm [Edit] [Quote] [IMS] [View car]

Post nr. 746


I get 450km with a full tank with mixed city traffic, highway crusing (4000rpm @ 120km/h in 4th gear) and lively driving (occasional redline).

If I drive careful and economical, I can get 550-600km with a full tank (but that ain't fun any more ).

So if your 320/6 can't make 400km on a full tank, it's time to check things!
I had worse fuel economy as well before I rebuilt my carb and set my timing. So doing a carb overhaul should help you a great deal.. The parts you need cost less than a full tank of gas. The following are good reads:

[LINK]: Article with pictures describing my own 4A1 rebuild.
[LINK]: 4A1 notes and findings by Mike Lindroos.

  Posted Sunday, Jan 9th 6:55pm [Edit] [Quote] [IMS] [View car]

Post nr. 222


Well i gotta study those articles! I do have problems with rich mixture....

Thanks tri,

Konrad.

  Posted Wednesday, Oct 25th 10:47am [Edit] [Quote] [IMS] [View car]

Post nr. 25


im having the same problems, full tank of fuel gets me about 220km which is really sad, wen i shud be gettin atleast 400kms, i know you guys are talking about carbs, but what about the 323i k-jetronic fuel system, since i hav that instead of a carb???

  Posted Wednesday, Oct 25th 8:52pm [Edit] [Quote] [IMS] [View car]

Post nr. 813


Well I rebuilt the carb and had it adjusted, it still is a gas guzzler!

Your Kjet may need adjustment, perhaps it has leaks of some sort also?

  Posted Friday, Oct 27th 4:05am [Edit] [Quote] [IMS] [View car]

Post nr. 445


Tri,
The LINKs still refer to "e21.tricord.cjb.net"... shud change to e21.tricord.be?

Tricord wrote:
I get 450km with a full tank with mixed city traffic, highway crusing (4000rpm @ 120km/h in 4th gear) and lively driving (occasional redline).

If I drive careful and economical, I can get 550-600km with a full tank (but that ain't fun any more ).

So if your 320/6 can't make 400km on a full tank, it's time to check things!
I had worse fuel economy as well before I rebuilt my carb and set my timing. So doing a carb overhaul should help you a great deal.. The parts you need cost less than a full tank of gas. The following are good reads:

[LINK]: Article with pictures describing my own 4A1 rebuild.
[LINK]: 4A1 notes and findings by Mike Lindroos.


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