Question about 2002 BMW 330i

1 Answer

My car is misfiring what could be causing this problem and how do you fix it

Sometimes the car runs good and sometimes the misfiring is more noticeable.

Posted by hugo on

Ad

1 Answer

desertracer

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points

    All-Star:

    An expert that got 10 achievements.

    MVP:

    An expert that got 5 achievements.

    Master:

    An expert who has achieved Level 3.

  • BMW Master
  • 450 Answers

Probably a coil or the connector that goes from the coil to the spark plug.. unplug one coil wire at a time and listen for RPM loss.. The cylinder with the least RPM drop off could be your problem. Change that coil to another cylinder .. see if the problem travels with it.. if it does you have found the problem..Remove the coils and check the connectors for cracks and carbon tracking.. if it does not travel check the spark plug. This is a large problem.. missing cylinders leads to bad cats.. a very very expensive problem.
Look to rockauto.com for parts.

Posted on Jul 02, 2014

Ad

Add Your Answer

×

Uploading: 0%

my-video-file.mp4

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

×

Loading...
Loading...

Related Questions:

1 Answer

Code PO354


The ignition coil on the number five cylinder may have a bad connection or bad power or ground control causing a misfire . Sometimes the coil itself may be bad .

Jun 03, 2018 | Cars & Trucks

2 Answers

Took my 98 ranger through inspection. it failed for ignition system misfire. will plugs fix this problem? seems like a good place to start.


Hi, i would change all the plugs 1st but also look and check the vacum pipes as they can sometimes cause a vacum leak.

Dec 22, 2015 | Cars & Trucks

1 Answer

I have a 1996 dodge grand caravan,v6 3.8L .it keeps pulling the code(random misfire). I've changed the coil pack,did a full tuneup(plugs,wires,fluids,all of it.and it still keeps misfiring when I first...


misfires are more from faulty injectors / leaking injectors so check the codes as the misfire code will indicate the problem cylinder
exampl code p0300 is random misfires and codes p0301 through to p 0308 is the cylinder ie p 0303 is no 3 cylinder

Jun 12, 2017 | Cars & Trucks

1 Answer

Misfiring 16 cylinder natural gas electronic engine


plug wire , plug or a valve. usually plug wire will cause a miss a valve if on intake side will cause it to misfire sometime back into the intake. the plug can sometimes fire and sometimes not so simple replacement would fix. compression check would tell if it is valve issue.

Dec 03, 2013 | Dodge Neon Cars & Trucks

1 Answer

Will a bad knock sensor cause a misfire. car is missing change the plugs no help codes are misfire and knock senser sometimes a #2 o2 sensor. 1999 maxima thanks for your help.


A Bad Knock Sensor will not cause a misfire, unless the advance is off due to a faulty Knock Sensor. The O2 Sensor will cause a random misfire.

Good luck on this repair.

Jan 21, 2011 | 1996 Nissan Maxima

3 Answers

P0300


P0300 is a random missfire code. What exactly would you like to know about it??

Dec 13, 2010 | 2004 Pontiac Grand Am

1 Answer

Cylinder misfiring


The cheapest and easiest way to remove a possible cause is to put a set of new, good quality spark plug wires in there. Bad wires, especially where they snap onto the top of the plug, can cause misfires. Do not mix up the firing order, replace one wire at a time.

Nov 14, 2009 | 1997 Ford Taurus

2 Answers

Car runs greAt BUT FLASHES LITE PO300 P1781


P0300 is a random engine misfire code. P 1781 is a transmission code, but it refers to a malfunctioning engine speed signal (crankshaft angle sensor). A bad crankshaft angle sensor or camshaft angle sensor can cause the P0300 code. A large list of items can cause a P0300 code, but since you have both, I'd be checking the crankshaft angle sensor and the related circuit. Sometimes, the mounting screws loosen up, which can cause the sensor to not function properly, all the time. Get this fixed, because over a period of 4 to 6 months, this can destroy the catalytic converter in the exhaust system ($$$$)
Charlie

Jun 14, 2009 | 2005 Chevrolet Aveo

2 Answers

2001 audi a4 CEL came on


I would start with the cylinder 4 spark plug and make sure it look good and is firing correctly.  After that I would look either at the final coil, ignition module and then o2 sensor.  These problems are so hard to diagnose and are trial and error so much of the time.

May 19, 2009 | 2001 Audi A4

Not finding what you are looking for?
2002 BMW 330i Logo

63 people viewed this question

Ask a Question

Usually answered in minutes!

Top BMW Experts

gbob59

Level 3 Expert

3063 Answers

old marine
old marine

Level 3 Expert

2326 Answers

randymanfive

Level 3 Expert

501 Answers

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

Answer questions

Manuals & User Guides

Loading...