Question about BMW X3 Series

1 Answer

My car is 00 bmw 3 series petrol the problem is hard starting if the engine start its stall and if i accelerate the throttle there is no power it like chocking.i change already the spark plug,change oil,filters and air flow meter

Posted by on

  • edgar basilio Jul 09, 2010

    yes,you are expert thank you i need to change the crank and cam sensor and see what is the improvement



1 Answer

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points


    An expert that got 10 achievements.


    An expert that got 5 achievements.


    An expert who has written 7 tips or uploaded 3 video tips

  • Master
  • 722 Answers

Try replacing the MAS (mass airflow sensor) - being the car is running rough and dying, it sounds like it may not be getting the appropriate O2 needed - One way to test, if you can get the car to stay running in park - tap the MAS with a screwdriver - (located between the airfilter casing and the intake manifold) - you'll see a small wiring harness out of the side it - it's usually black and either square shaped or rectangular - also make sure the air filter is in good shape.

If when tapping on the sensor the car dies, idle fluctuates; then it needs repalced (or possibly cleaned - purchase a can of MAS sensor cleaner {local auto parts dealer} and clean it first (spary sensor generously and let air dry for 15-20 minutes - put back together and start car - if there is no difference, then replace - if this is not the problem - try to get the car to a auto parts dealer and have them run a diagnostics test: Here are some other things that may cause this:

crank shaft sensor (car usually won't run at all if bad)

cam shaft sensor

harmonic balancer (will throw timing off dramatically: do not drive if this is cracked, broken, or (if rubber exists) is missing chunks...

This is most likely fuel injected and has coil packs instead of a distrubutor:

If coil packs: have each tested and replace any that are bad (must remove to be tested). This may also have a modular that he pack(s) sit on - If this is bad, it will need to be replaced (cannot be tested) - signs are: bubbles and/or melted appearance on the top of the modular.

If equipped with distributor:

replace: cap, rotor, plugs, plug wires.

Also, if the check engine light is coming on, replace the O2 sensors (have diagnostics test done will determine if these are bad - codes will be presented for each "malfunction" or "faulty" components.

Please let me know if you need further assistance.


Guru, Premium Expert @

Posted on Jul 09, 2010


1 Suggested Answer

  • 2 Answers

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

Hi there,
Save hours of searching online or wasting money on unnecessary repairs by talking to a 6YA Expert who can help you resolve this 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.

Here's a link to this great service

Good luck!

Posted on Jan 02, 2017


Add Your Answer

Uploading: 0%


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



Related Questions:

2 Answers

89 ford probe hesitates when leaving a red light, then runs fine otherwise, fuel filter?

Engine Runs Rough, Stalls, Hesitates on Acceleration, Hard ... > Problems > Ford > Probe
Ford Probe Engine Runs Rough, Stalls, Hesitates on Acceleration, Hard Starting, Poor Performance. This is a verified problem based on 9 reports. Learn more ...

Starting Problems - 1997 Ford Probe - RepairPal > Questions > Ford > Probe > 1997 Ford Probe
Dec 5, 2010 - Starting Problems on 1997 Ford Probe ... If the engine runs rough,stalls, hesitates on acceleration, is hard to start, or has generally poor ...

A new misfire/hesitation on accel. Problem.. - Forums > Tech Section > 2nd Gen (93-97) V6 2.5L

Feb 05, 2016 | Ford Cars & Trucks

1 Answer

325ci engine stalls

It may be worth checking the throttle pot for consistancy in its resistance reading from idle to full throttle. Ive had one of these fail with a dead spot just off idle. This caused the ecu to loose coms for a short while and stalled the car. Also the idle stab gets confused when this happens. This was on a 320 though but might be worth a look. Do the test with the plug disconnected and the engine & ignition off.

Apr 14, 2013 | 2005 BMW 3 Series

1 Answer

Ran out of gas and put more in now car wont start i drive a bmw 3 seies

running out of fuel sucks the dirt off the bottom of the tank it might have caused it to fail i think you can get to it from under the back seat you can see if the pump has power there as well

Apr 18, 2012 | 2002 BMW 3 Series

2 Answers

I have a Semi-Automatic 2005 BMW e46 318i. The engine randomly cuts out (stalls) when decellerating, coming to a stop, or when stopped. Other than this problem the car drives fine, and the engine starts up...

The problem you are having sounds suspiciously like the torque converter is not disengaging to allow your engine to spin freely until you are ready to accelerate.If when decelerating or coming to a stop you feel a jerking sensation similar to driving a vehicle with a manual transmission and bringing the vehicle to a stop without depressing the clutch, then the problem you are having is faulty Torque Converter Control Solenoid or a bad Torque Converter itself. If you have any other questions please contact me here. Good luck.

Mar 18, 2011 | 2005 BMW 3 Series

1 Answer

I own a late edition touring 1994 BMW 320i saloon, six cylinder inline engine. problems I have been recently experiencing engine stalling problems, engine tends to work erratically by revving on its own,...

Seems you have a few problems, the irradic idle might be do to a bad idle air control valve/MAF, hard start issue i would need more info to help you better.

Sep 02, 2010 | 1994 BMW 3 Series

1 Answer

On a cold start, the engine struggles

probably a bad air/flow sensor, try to clean it with sensor cleaner, its by the air intake filter box. if not clean the throttle body really good.

pls vote.

Oct 09, 2017 | 2000 BMW 3 Series

1 Answer

2000 bmw 321i stalls and lacks power when accelerating

it may be your fuel pump not working properly also check your fuel pump relay

Nov 14, 2009 | 2000 BMW 3 Series

1 Answer



It sounds as though you either have a faulty O2 sensor, or there is a fuel pressure issue, which from your description, could be due to a worn fuel pump.

If the car performs ok under full acceleration, but plays up at either part throttle or no throttle, then you may well have a faulty O2 sensor.

Very best regards


Jun 08, 2008 | 1999 BMW 323 Series

Not finding what you are looking for?
Cars & Trucks Logo

Related Topics:

55 people viewed this question

Ask a Question

Usually answered in minutes!

Top BMW Experts

Anthony Jones
Anthony Jones

Level 2 Expert

128 Answers

Chris Bowser

Level 1 Expert

18 Answers


Level 2 Expert

102 Answers

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

Answer questions

Manuals & User Guides