Question about 2004 BMW 3 Series

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I have a 04 325ci the car twitching between 2000 and 3000 rpm i did replaced the lower intake boot ,sparks,air filter , fuel filter.Please help me what else can be Thank you

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Check to be certain that all of the hose clamps are tight and that there are no air or vacuum leaks especially between the throttle body and the MAF (mass air flow meter/sensor)

I hope that this has been of any help to you and will solve your problem.

Posted on Apr 28, 2010

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How old is the air filter? Replace if dirty. Did you adjust spark plugs to correct gap when installed?

Check sensors, particually maf sensor, may need replacing or cleaning. Maf sensor is located on the intake pipe from the air filter. Can buy the cleaner on eBay, 'maf cleaner'. The maf sensor measures air flow telling the injection how much fuel to use.

Also if there is a crank or flywheel sensor, check it's ok.

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Well is the check engine light on or have you tested for codes yet? and it sounds like it could be a sensor issue, and if you didnt replace the distributor and cap and rotor that could be an issue also

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When the vehicle is placed in gear the rpm's drop low and it almost stalls. if i press the gas the rpm's drop even lower, if i hold the gas slightly at this ponit it will slowly begin to go and starts to...

sounds like an intake manifold gasket leak which will throw of the air fuel mixture and engine cannot account for extra air.also check(maf)(map)(tps)sensors and/or (iac)intake air control valve...hope this helps you. thanks for using fix ya please rate answer.

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I have a 2002 Chevy Impala, it starts great in the morning when the engine is cold, but once the engine warms up it is very difficult to start. It cranks alot and even backfires sometimes. Also I noticed...

Engine is difficult to start when cold
  1. Check the battery condition, battery state of charge and starter motor current draw. Replace the battery if marginal and the starter motor if the current draw is beyond specification.
  2. Check the battery cable condition. Clean the battery terminals and replace corroded or damaged cables.
  3. Check the fuel system for proper operation. A fuel pump with insufficient fuel pressure or clogged injectors should be replaced.
  4. Check the engine's tune-up status. Note the tune-up specifications and check for items such as severely worn spark plugs; adjust or replace as needed. On vehicles with manually adjusted valve clearances, check for tight valves and adjust to specification.
  5. Check for a failed coolant temperature sensor, and replace if out of specification.
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Engine is difficult to start when hot
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