Question about 1994 BMW 3 Series

1 Answer

Low/poor idle engine ticking over revs in idle very low,rev counter will shoot up and down revs up on its own. Changed air flow meter no change

Posted by on

1 Answer

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points

    Top Expert:

    An expert who has finished #1 on the weekly Top 10 Fixya Experts Leaderboard.

    Superstar:

    An expert that got 20 achievements.

    All-Star:

    An expert that got 10 achievements.

  • BMW Master
  • 60,985 Answers

Here is what you need to do, a cleaning of the intake throttle blade and the idle speed control air-bypass valve, they get full of gunk over the miles and cause idle issues (stalls) like yours,
Get a can of intake cleaner from any local parts store, not carb spray, intake cleaner, it is made by a company called CRC, remove the air intake hose to the engine, hold the idle high so the engine won't stall, then spray the can of cleaner into the intake while keeping the engine running, use at least 1/2 the can, shut down the engine and disconnect the battery for 5 minutes, then restart and complete a number of mixed driving cycles, town, freeway, stop and go etc., after a few days the problem will go away as the system will relearn to the clean intake

Posted on Oct 31, 2008

Add Your Answer

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

1 Answer

Pulsing idle


Could be the Throttle Position Sensor. Just changed mine and it now idles properly. Mine would occasionally surge when at idle. Mine would also rev around 1500 to 1800 at startup and take a very long time coming down to normal idle. Changing the TPS has solved all my idle problems.

Jun 05, 2014 | 2005 Land Rover Freelander

1 Answer

Engine revs in park


This is called hunting. Can be caused by a bad mass air flow sensor. Could also be a sticking idle air control valve.

Jan 08, 2014 | Nissan Xterra Cars & Trucks

1 Answer

Loosing anti freeze engine over heating


replace the viscous fan hub or check the electric fan operation as you do not have a forced air flow at idle. When the engine is working hard at low revs (pulling up hill) there is insufficient road air flow and at idle at lights there is no road air flow

Jun 23, 2013 | 1999 Cadillac DeVille

2 Answers

Renault traffic van that has no power until turbo starts to boost. Some times when i labour the engine at low revs the glow plug light will come on too? Any idea's?? Thanks


i've got trafic 100dci 2001 year-had poor exceleration upto 2000 revs then turbo cut in,also at speed-mainly uphill the power would start to pulse(like small jerks forward)until it ran out of steam-80ish,changed egr valve-didn't fix it! then tested air flow meter and found figures incorrect,so replaced,also tested the tubo rod(down the back of the engine -visible with air filter housing removed)this was very stiff,so used wd40 to clean then spray oil to lube and worked the rod backward and forward until it moved freely.put all back together and that was it-back to normal-hooray!! have to point out that the van will not rev past 3700 revs when it is loaded-it has a load sensor,unloaded or partly loaded it will rev to I think about 4100 revs(don't quote me on that though) do hope this will help whoever and God bless

Aug 15, 2011 | 2006 Renault 181

1 Answer

Hi, do u know what can be the cause of rev counter going up and down whilst idle? on a golf gti cheers


VWs are not well known to have idle issues however, a bad or stuck Idle Air Control valve, or a bad Mass Air Flow meter can cause this issue.

Jun 17, 2011 | 1999 Volkswagen Golf

1 Answer

1991 vette. Driving down the road and the engine just quit. Changed the fuel filter. Now if it starts, it idles low and if you try to press on the gas pedal, the engine dies. Engine won't rev up.


Have the TPS (Throttle Position Switch) checked with a milli-volt meter, it seems like it is not working properly or is dead. if it is not working it won't send a signal to the ECM (Computer) to let it know how much the accelerator pedal is being depressed so it cannot know how much give fuel and air to give the engine. Also have the MAF (Mass Air Flow) sensor checked.

Jun 15, 2010 | 1991 Chevrolet Corvette

1 Answer

Revs up and down at low revs


you need to clean or replace your idle air control valve(IAC). The IAC allows your engine to idle smoothly by opening and closing a valve that allows air flow to the engine that is monitored by the computer. The IAC get dirty causing it to stick and move slower than it should which causes the up and down idle

Oct 29, 2009 | 1998 Ford Escort

1 Answer

Speedo will cut out when driving


Sounds like your "speed sensor" is failing. When it fails it will cause irregular shift patterns and engine idle speeds.

Jun 10, 2009 | 2000 Ford Focus

2 Answers

Ford tick over problem


The battery could be slightly weak, making the computer go on the fritz, try a fresh battery!!!! The rev counters bounce often with a weak battery.

Leave feedback good or bad.

Jun 02, 2009 | 1997 Ford Escort

1 Answer

When in neutral or low rev occassionaly cuts out


it's your idle air valve located on the backside of your intake round with two large lines going to it make sure you check junkyards first for one because you'll faint when you hear the price at the parts counter.

Apr 27, 2009 | Volkswagen Golf Cars & Trucks

Not finding what you are looking for?
1994 BMW 3 Series Logo

561 people viewed this question

Ask a Question

Usually answered in minutes!

Top BMW Experts

Fred Sops

Level 2 Expert

271 Answers

Al Clark

Level 2 Expert

290 Answers

Doberman

Level 2 Expert

246 Answers

Are you a BMW Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...