Question about 1994 BMW 3 Series

2 Answers

Engine is fuluctuating(unstable in during operation)

Engine fluctuating about all the time and somtime when i shut down the eninge its not get off directly, means like still some fuel and ignition with swich off.
espically when i fill the tank to fully fuel the engine gets shut down sometime, and the engine start fluctuating during its operating.
i change the spark plugs, clean the air filter, check the air mass flow is good.

what can i do else???????????

note******* i have engine (vanos)6 cylinders in BMW 320i ,1994

Posted by on

  • ism5213 May 18, 2010

    engine fluctuating about all the time and somtime when i shut down the eninge its not get off directly, means like still some fuel and ignition with swich off. espically when i fill the tank to fully fuel the engine gets shut down sometime, and the engine start fluctuating during its operating. i change air filter, spark plug and fuel filter;icheck throttle valve , air mass sensor no proplem found.

    what can i do??????????

×

Ad

2 Answers

  • Level 2:

    An expert who has achieved level 2 by getting 100 points

    All-Star:

    An expert that got 10 achievements.

    MVP:

    An expert that got 5 achievements.

    President:

    An expert whose answer got voted for 500 times.

  • Expert
  • 4,070 Answers

Hi! I believe that you have a Powertrain Control Module (PCM) problem. It will need a diagnostic to trace the problem. After the diagnose an error or fault code will appear, from there you will know whats the problem and what needs to be replaced. The PCM is like a car's brain, lets just hope that its not the PCM itself that has a problem. Hope this helps and have a good one!

Posted on May 18, 2010

  • 2 more comments 
  • ism5213 May 18, 2010

    i will check and i will replay to y



    thanks indeeed

  • dj_relly999
    dj_relly999 May 18, 2010

    Check or replace the PCM and you'll be good. Take care!

  • ism5213 May 22, 2010

    HI
    could i used other car PCM and to check only. i mean better than buying a new one . and it its work or not i will dicover the proplem it self.

  • dj_relly999
    dj_relly999 May 22, 2010

    Should be the same series, check the junkyard for availability and its much cheaper there too..

×

Ad
  • Level 3:

    An expert who has achieved level 3 by getting 1000 points

    Superstar:

    An expert that got 20 achievements.

    All-Star:

    An expert that got 10 achievements.

    MVP:

    An expert that got 5 achievements.

  • Master
  • 2,427 Answers

Did you change your fuel filter and check your gas tank for rust particles that may be fouling the engine ????

1.) remove hose leading to filter and stick that end in a glass gar..
2.) turn on ignition and let a bit of fuel get in the jar,,
3.) turn off ignition,,
4.) examine fuel for discoloration and particles,, if you have tank remved and cleaned..
5.) change fuel filter,

Posted on May 16, 2010

  • 2 more comments 
  • ism5213 May 16, 2010

    thanks for your replay
    but there is no proplem with fuel filter and the tank its self because i do that and i did not find any thing in this field






    thanks indeeeeeeeeeeeeeeeeeeeeed

  • ism5213 May 16, 2010

    engine fluctuating about all the time and somtime when i shut down the eninge its not get off directly, means like still some fuel and ignition with swich off. espically when i fill the tank to fully fuel the engine gets shut down sometime, and the engine start fluctuating during its operating.
    i change air filter, spark plug and fuel filter;icheck throttle valve , air mass sensor no proplem found.




    what else can i do??????????




  • Rishi Roshan Ali May 18, 2010

    Did you get a diagnostic done ? Do this and check your throttle body..

  • ism5213 May 18, 2010

    still the proplem even when i check the diagnostic

×

Ad

1 Suggested Answer

6ya6ya
  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

Hi,
a 6ya expert can help you resolve that issue over the phone in a minute or two.
Best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
the service is completely free and covers almost anything you can think of.(from cars to computers, handyman, and even drones)
click here to download the app (for users in the US for now) and get all the help you need.
Goodluck!

Posted on Jan 02, 2017

Add Your Answer

Uploading: 0%

my-video-file.mp4

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

×

Loading...
Loading...

Related Questions:

2 Answers

How do I fix RPM fluctuation problem


check you charging system, you must have bad or loose alternator wire

Apr 02, 2015 | 2004 Mitsubishi Lancer

1 Answer

P0964


I sure hope you are not Towing in OVERDRIVE...

If a P2563 is found, it may be caused by an unstable Solenoid Control Valve (SCV). Unstable SCV operation may be induced by engine debris or sludge. To diagnose an unstable SCV complete the procedure below.

Test the VPS (Vane Position Sensor) operation. Actuate the VPS plunger and monitor the sensor voltage on the Tech 2. The VPS body should be grounded during this test. Touch the brass body of the VPS to the turbo center housing to complete the ground. Voltage should go from 4.9v to 0.25v as the plunger is depressed. If the sensor operates correctly, go to next step, or replace the VPS as necessary.

Note: It's normal for voltage to jump back to 4.9v if the plunger is completely depressed.

Command turbo vane position from 10% to 90%, back and forth, several times. During each cycle, monitor the actual turbo vane position sensor reading. The vane position should reach the desired position, and hold steady. If vane position oscillates back and forth more than 5% before stabilizing at the desired position, replace the solenoid control valve.

Note: Debris or sludge build up in the SCV can cause the valve's stability to deteriorate. This can be aggravated by not following oil change intervals and/or extended idling in combination with use of biofuels.

Please follow this diagnostic or repair process thoroughly and complete each step. If the condition exhibited is resolved without completing every step, the remaining steps do not need to be performed.

Apr 15, 2013 | 2006 Chevrolet Silverado 3500

1 Answer

Jeep Grand Cherokee shuts off at idle while stopped. RPM fluctuates then engine eventually dies.


your idle air control valve is going out located behind the throttle body.

Feb 12, 2013 | 2001 Jeep Grand Cherokee

1 Answer

I changed the engine oil, filter and spark plugs in my 1999 Volvo 940 (1996 cc). Upon starting up, the engine runs at lower rpm and "hiccups" at idling.


Engine stalls or RPM fluctuates at idle up and down.

This problem is commonly caused by a dirty automatic idle speed control valve and throttle valve but always run a OBD2 fault code as well as the cleaning procedure. Buy a can of throttle valve cleaner (do not use carburetor spray cleaner!) from NAPA or Carquest (made by CRC chemicals) and spray it into the air intake while the engine is running, use up about 1/2 the can, engine will try to stall hold the speed up, shut it down and let it soak for 30 minutes, restart and blow out the remaining fluid, shut it down and disconnect the negative battery cable for 5 Min's to reset the base idle control


Oct 15, 2012 | Cars & Trucks

1 Answer

2004 GMC Envoy. My ac is causing my engine to fluctuate in RPM's and will cause engine to die somtimes. If I turn ac off it will idle just fine. Need help.


The throttle body needs to be cleaned, grime in this area prevents the throttle plate from closing completely and allowing air to enter, making the air/fuel mixture lean.

Oct 16, 2010 | 2004 GMC Envoy

1 Answer

My temp guage goes up and down when im drivin? Its a 1992 toyota corolla wagon.


Your temp ranges from what to what? Some fluctuation is normal during operation because the thermostat is constantly moving to regulate temp, as does the electric fan. Providing changes are not large, and engine is not overheating, or low on coolant, everything is probably normal.

Mar 03, 2009 | Pontiac Aztek Cars & Trucks

1 Answer

My car heater is blowing cold air


The shut off valve on the heater core was left shut during the repair on your coolant system. the repairman forgot to re open the shut off valve . this is the problem. open the shut off valve and, the air will become hot again. as for the gauge fluctuations, the actual gauge may be malfunctioning.

Feb 24, 2009 | 1996 Toyota Corolla

1 Answer

Egr low circut malfuntion


  1. Check the EGR control system and EGR valve with the engine fully warmed up and running [engine coolant temperature over 76 °C (170 °F) ]
  2. With the transaxle in neutral and the throttle closed, allow the engine to idle for 70 seconds .
  3. Abruptly accelerate the engine to approximately 2000 r/min , but not over 3000 r/min .
  4. The EGR valve stem should move when accelerating the engine. Repeat the test several times to confirm movement.
  5. If the EGR valve stem moves, the control system is operating normally.
  6. Remove the vacuum hose from the EGR valve and plug the hose end.
  7. Connect a hand vacuum pump directly to the EGR valve
  8. Check whether the engine stalls or if the idle is unstable when a vacuum of 20 kPa (6 in.Hg) or higher is applied while idling.
this is the test procedure but I would suspect the EGR TRANSDUCER SOLENOID

Jan 19, 2009 | 2000 Chrysler Sebring

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

Related Topics:

35 people viewed this question

Ask a Question

Usually answered in minutes!

Top BMW Experts

Anthony Jones
Anthony Jones

Level 2 Expert

128 Answers

Frankie B

Level 2 Expert

65 Answers

Doberman

Level 2 Expert

254 Answers

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

Answer questions

Manuals & User Guides

Loading...