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2005 BMW 320i Using too much fuel, not shifting properly

Hey guys,

Ive been reading your psots and I feel I may have a simial problem, A friend drove my car and said maybe it was my torque converter but I am doubting that.

When I first start the car I have a rough Idle around 500 rpm and when I go to give it gas my instant fuel economy gauge doesnt react for about 2-3 seconds after Ive pressed the gas pedal. Also Ive noticed that its using way more fuel than it should be, Ive suspected a misfire in one of the cyliders or I need a new spark plug...obvioulsy I dont wanna spend lotsa money on DX the problem.

Any feedback would be greatly appreciated.

Alex

PS. I have had some steering wheel wobble with my Pirelli P6 M+S tires around 60 km/h...dealer says my tires arent rigid enough and thats whats causing the problem...any guesses???

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6 Suggested Answers

6ya6ya
  • 2 Answers

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Posted on Jan 02, 2017

Benimur
  • 6966 Answers

SOURCE: I have a 2002 745Li

Hi,

If you are "stuck in the Mountains", then it would be relatively dangerous to go back down if the vehicle's computer senses any malfunction in the braking system. Even your emergency brakes are also giving a warning. Since your vehicle is experiencing multiple malfunctions, either the sensors are reading wrong inputs, there is something really big wrong with the car or the car's computer is having a glitch. If even after performing the below listed steps and the warnings are still there and/or you are not comfortable with the brakes, then it perhaps would be wise to seek qualified professional assistance and consider alternative ways of going back down.

In most cars, the on board computer could be reset by removing the negative terminal of the battery. Some requires that this be done with the ignition turned ON but engine not running. Likewise, there are some car stereos that will go into protective mode (security lock) when the battery terminals are removed and would require a "code".

On the brake, pls look under your vehicle, there could be sensors that were disconnected. For the brakes, they would normally be at the back of each wheel. Additonally, parking brake lights would also come on if the brake fluid level is below minimum or if the brake pads have reached a pre-determined level of thickness (or thinness in this case).

Hope this be of initial help/idea. Pls post back how things turned up or should you need additional information.

Good luck and kind regards.

Thank you for using FixYa.

Posted on Jul 29, 2008

johnthejag
  • 286 Answers

SOURCE: bmw 320i e46 2002/misfiring

Hi Retze

From your report on the symptoms of your problem, it definitely points to an electrical problem, which is aggravated by cold and damp.

The smell of fuel in your oil, points directly to a misfire and non combustion on one, or more cylinders, and the subsequent unburnt fuel washing down the bores and into the fuel, thus breaking down the viscosity of your oil, and going to give you premature , and excessive wear on your engine before too long, if not already.

As you say loosing oil, which I expect is going out the exhaust, due to ring or piston wear.
This problem must be cured quickly !

I would firstly suggest, all the spark plugs are removed, and inspected very closely for contamination signs, from oil or fuel.

This will hopefully give you a clue, as to the problem cylinder/s.

Also a dry and a wet ie:- ( injection of some oil in the cylinder ) compression test should be carried out, on cold engine.
This will tell you if your valves, pistons and rings, head gasket,etc are all serviceable, from the pressure readings.


A master guage should also be connected, and your oil pressure checked to give your oil pump, and lubrication system, to hopefully give it too a clean bill of heath.

Now as to my gut feelings as to where your problems may lie ?

I too suspect the spark plug coils, as they are problematic with BMW, as they are also, with my specialist subject, Jaguars.

They are sometimes difficult to fault, as the problem can be intermittent.
And usually the clear sign is the spark plug condition on removal, which is the give away !

I am also very concerned as to how long ago you changed your engine oil & filter, as if you can smell the fuel in your oil, it must be thinned down considerably, and also affecting your hydraulic valve lifters.
Mind you if worn or faulty, you can usually hear the problem.

Your first line of attack is remove the spark plugs, and inspect those plugs !

Let me know what you find, and give me your feedback as to your thoughts on my comments.

Good Luck !

Remember to give me a rating if you think I have been of assistance, thanks !

John.







Posted on Jan 22, 2009

haider_alhar
  • 90 Answers

SOURCE: 2001 bmw 325i is misfiring?

misfire happens because there is still fuel not burned in the cylinder so when its pushed out its burned in exhaust tube because the heat thats why you hear these small explosions. this caused if your sparking pluge not firing well . or there is a leak in the intake valve . in your case i advice you to check your sparking plug . if this helped pls vooote

Posted on May 31, 2009

  • 6 Answers

SOURCE: 2001 bmw 325i changing spark plugs

it doesant sound like its a problem from your spark plugs sounds more like a stepper motor problem make sure you have fitted everthing correctly after you have changed spark plugs sensors ect if you needed to remove elctrical sensors

Posted on Jun 09, 2009

  • 599 Answers

SOURCE: BMW Z3 rough idle on start codes read P1189 , P0173

all the codes you have are all related to the fuel trim, this problem needs to be looked at with a european capable scanner for futher tests sorry.

Posted on Dec 05, 2009

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