03 ENGINE PROBLEMS

2003 BMW 330ci

Tiny

majorpaynesautorepair

November, 27, 2010 AT 12:03 AM

03 bmw 330ci back firing and missing
p0300 random missfire
p0313 low rpm missfire
p0171 and p0174 left and right banks lean

FOUND 11935 RELATED QUESTIONS

4 Answers

Tiny

rasmataz

November, 27, 2010 AT 12:10 AM

Lean fuel condition could be caused by one of the following below: 1. Vacuum leaks
2. EGR and PCV valve.
3. Low fuel pressure.
4. Dirty fuel injectors.
5. Mass Air Flow Sensor.
6. Oxygen Sensor.

Tiny

majorpaynesautorepair

November, 27, 2010 AT 1:04 AM

No vacuum leaks, fuel pressure good, my scanner does not support european so can not get anything on mass air flow and bmw does not use egr they us A.I.R

Tiny

Dr. Hagerty

November, 27, 2010 AT 4:17 AM

To find the root cause may require having BMW specific scanning equipment. What method did you employ to assure there are no vacuum leaks? What was the fuel pressure? Has the engine had cam timing checked? More history and a more detailed story of what has been done and how the car showed up at your shop might shed some light and would go a long way in our being able to help, otherwise we are in the dark here.

Tiny

Dr. Hagerty

November, 27, 2010 AT 4:31 AM

Also, what coils are in the engine? The 2003 cars had lots of coil issues, pull one and describe it to me please, what color is it, is it Bosch or Bremi?

Please login or register to post a reply.

Engine Class - Autoshop 101
Air Filter Replacement
Air Intake Boot Replacement Toyota Tacoma
Code Read Retrieval/Clear Chevrolet Camaro
Oil Change & Filter Replacement Acura TL
Air Filter Replacement Toyota Prius