If this is your first visit, be sure to check out the FAQ by clicking the link above. You may have to register before you can post: click the register link above to proceed. To start viewing messages, select the forum that you want to visit from the selection below. |
|
|
Thread Tools | Display Modes |
#1
|
|||
|
|||
How to adjust RPMs
I have a 1995 BMW 518. The engine runs at about 1100 when idling. I do
a lot of slow city driving and feel that this rpm are a bit high for optimum fuel consumption. Two questions 1. What is the recommended rpm when idling? 2. How can I adjust rpm - the accelerator cable is adjusted to maximum? Thanks People.... |
Ads |
#2
|
|||
|
|||
"Louis Carroll" > wrote in message om... > I have a 1995 BMW 518. The engine runs at about 1100 when idling. I do > a lot of slow city driving and feel that this rpm are a bit high for > optimum fuel consumption. > Two questions > 1. What is the recommended rpm when idling? > 2. How can I adjust rpm - the accelerator cable is adjusted to > maximum? > > Thanks People.... Sounds like a problem with the idle control valve, or perhaps a vacuum leak. What happens when you are idling and you go from nothing to engaging all power accessories you can and your A/C, does the idle drop, race, or stay at 1100? Any difference from cold to warm? -Russ. |
#3
|
|||
|
|||
> I have a 1995 BMW 518. The engine runs at about 1100 when idling. I do
> a lot of slow city driving and feel that this rpm are a bit high for > optimum fuel consumption. > Two questions > 1. What is the recommended rpm when idling? I think it's 650 for the M43 1.8. > 2. How can I adjust rpm - the accelerator cable is adjusted to > maximum? First, make sure your floor mat's not touching the accelerator. Happened on a mate's 520i :-) You can't adjust the rpm as it's computer controlled. If it's high you have: a badly adjusted throttle position switch a vacuum leak the car still think it's in cold start mode due to a bad temp sensor (I'm not certain that affects the idle rpm). -- Who needs a life when you've got Unix? :-) Email: , John G.Burns B.Eng, Bonny Scotland Web : http://www.unixnerd.demon.co.uk - The Ultimate BMW Homepage! Need Sun or HP Unix kit? http://www.unixnerd.demon.co.uk/unix.html |
#4
|
|||
|
|||
Thanks Russ..when engine is started revs hover just below 1000. As the
engine warms up they climb to 1100. When warm (at 1100) it drops maybe back to 1000 if I put on lights, fan and radio. Rgds Louis |
Thread Tools | |
Display Modes | |
|
|
Similar Threads | ||||
Thread | Thread Starter | Forum | Replies | Last Post |
Adjust tickover on e34 525i ? | ray | BMW | 0 | November 10th 04 06:54 PM |
156 driver's seat - lumbar adjust broken?? | fmt | Alfa Romeo | 1 | October 13th 04 02:08 PM |