How JustAnswer Works:
  • Ask an Expert
    Experts are full of valuable knowledge and are ready to help with any question. Credentials confirmed by a Fortune 500 verification firm.
  • Get a Professional Answer
    Via email, text message, or notification as you wait on our site. Ask follow up questions if you need to.
  • 100% Satisfaction Guarantee
    Rate the answer you receive.
Ask Matt Your Own Question
Matt, Mechanical Engineer
Category: BMW
Satisfied Customers: 22747
Experience:  BEng hons Mech engineering, in auto industry 22 years
Type Your BMW Question Here...
Matt is online now

2004 bmw e46 320d automatic when starting from cold you blip

Customer Question

2004 bmw e46 320d automatic when starting from cold you blip the throttle take your foot of throttle there is a viberation you can feel it through your driving seat when engine warm and you are driving it seems to be ok can you help thankyou john
Submitted: 3 years ago.
Category: BMW
Expert:  Matt replied 3 years ago.

Most diesels are bit rough running when stone cold so I'd expect a bit of vibration compared to when its warm

however it would be worth while trying a bottle of injector cleaner in the tank as a clogged up nozzle will give poor combustion and create noise / vibration and another possibility is that the fuel filter is blocked so resulting in low fuel pressure and again poor combustion - replace the filter in any case as diesels are very sensitive to this
Expert:  Matt replied 3 years ago.


do you still need help with this?