Question about 1992 BMW 3 Series

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Were is the automatic choke situated my car is revving to high

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Your car doesn't have a choke. Fuel injected engines alter the mixture using information from the sensors to give the right mixture all the time, thus negating the need for a choke. This is only for carbureted engines, and your car is not. If it's idling fast, you can change the settings on your idle set screw, or have it tuned.

Posted on Dec 10, 2009

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Posted on Jan 02, 2017

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I have an '85 S-10 Blazer with a 2.8 V6 automatic transmission, it has a high idle and a dieseling problem, the previous owner removed the fuse for the automatic choke, how can I reduce the idle?


Dieseling or running-on is a fairly natural consequence of an engine that is idling too fast or being switched off before the idle has been restored after being revved.

Changes to engine design to improve acceleration and economy and meet new emission regulations required higher idle speeds and dieseling became a common problem which required the introduction of a fuel cut-off solenoid on many carburettors.

Dieseling is sometimes the result of overheating or too much carbon in the combustion chamber.

The design changes mentioned above required changes to carburation, including the choke design and operation. Complying with new emission regs required a quick engine warm-up and for the automatic choke to disengage in about two minutes. A higher fast idle was also required and mostly at least one vacuum servo was used to ensure smooth running during the warm-up period.

In order to disengage the choke quickly, it was often arranged to be heated, either by electricity alone or by electricity and hot water.

If the fuse has been removed the choke will not work correctly. Why the previous owner removed the fuse is a mystery, perhaps there is a fault.
The choke must be put back into good operation in order to achieve proper fuel economy and smooth running, or alternatively the carburettor could be converted to manual choke.

Apr 30, 2017 | Cars & Trucks

2 Answers

I have a 1993 ford festiva its a good little car it runs good when the engine is cold but when it warms up it sputters and dies on me when it dies it fires right back up like nothing ever happened It...


If it has an automatic choke, this will keep it revving more when the engine is cold and less when hot. Maybe adjust the idle setting screw on the carburettor so it revs slightly more. Try that before it is running hot. Only increase the revving gradually to the stage where stalling would be avoided when hot. Gradually so that there is not too much revving when cold. Adjusting and testing over a few runs could be a good strategy

Feb 28, 2014 | Ford Festiva Cars & Trucks

1 Answer

My 1994 mazda 323 astina automatic revvs high and low. what's the problem


When does is rev high and low? If it does this at idle check for a vacuum leak or maybe a blocked airflow

Jan 12, 2013 | 1994 Mazda 323

1 Answer

Nissan vanette idle screw location?


There is no idle ajustment screw, the idle speed is computer controlled.

Apr 11, 2012 | Cars & Trucks

1 Answer

I have a Peugeot 206 xsi 2002. When turning mostly right there is a grinding noise on drivers side. I've checked go any debris it may be catching on. No debris. It also sounds like the engine is...


Revving quite high when starting is normal if the engine is cold. The revving is caused by extra fuel via the automatic choke and this reduces to normal running noise level when the engine has heated up. Assuming your car is regularly serviced i.e. oil, filters, etc and if this is not normal behavior I would recommend using a good 'total fuel system cleaner' additive as this will clean your fuel system that may have built up dirt over time and not be working at 100%. As regards the grinding noise on the drivers side when turning - this could most likely be your CV joint (Check the rubber seal for cracks and grease and if so have it replaced immediately before it seizes) or it could also be a worn suspension joint or even a worn/jammed brake pad (noticeable when breaking). Either way you need to take it to your mechanic.

Apr 05, 2012 | 2001 Peugeot 206 1.6

1 Answer

Engine over revving at idle


looks like yor air valve is not working properly.check the water imput (could be clogged). also,did you removed your termostat? if so,put it back and solve the problem.

May 07, 2009 | 1984 Toyota Corolla

1 Answer

High Idle from start


Maybe the automatic choke needs a good cleaning and has gummed up over time and is possibly causing the choke to stick until the engine warms and loosens the part to function properly.

Apr 18, 2009 | 1994 Toyota Pickup

1 Answer

Engine surging high rpms at stop signs/lights...


the idle air control solenoid or a vacuum leak on backside of intake the hose that goes to pcv valve.they are both common problems on this car.check for vacuum leak firstthanks for your question....

Feb 04, 2009 | 2000 Ford Focus

1 Answer

Over revving in park and nutral on a 2l auto estate Nubira


Hi,

This is a problem with the "auto throttle control unit" (SilverwolfRA, yes aka - auto choke).

A car computer mechanic downloaded the info. from my 1999 Nubira and then adjusted as necessary. It didn't repair to complete (as new) functionality (as the unit is damaged?), but I'm happy with the result.

Regards,
Rick [Brisbane, Australia]

Dec 21, 2008 | 2000 Daewoo Nubira

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