Alfa 147 engine cut off problems
Dear Alfaowners,there is no other place I can ask for help and you are my only hope.
My Alfa 147 (2002 1.6 16v 77kW) had 2 problems and now they expanded.
First of all I searched the whole forum and I know the common problems that can be related with my issues (I've been on internet search for a month about now and I've searched the other forums and collected all possible information related to the problem).
The car sometimes would not turn on.The engine would start immediately but would turn off RPM meter would just go up and down.After few times the engine would start and keep it running.This issue would appear 1 or 2 times in 15 days.
The other issue which evolved is the engine would cut out when in idle.I can start the engine immediately but the CHECK ENGINE and IMMOBILISER lights would stay on,sometimes 20 minutes sometimes 5 hours.This would happen once a month.And now it cuts out while driving,first the CHECK ENGINE light would come on then after 5-6 seconds it would cut out.I can start the car immediately but idle would jump down-up-down-up between 200-500RPM for some time then keep it constant.
Crankshaft sensor was replaced,MAF sensor sensor as well.Battery is good,terminals are cleaned.Relays are ok.I was in official Alfa service to determine the problem but they didn't find whats wrong.ECU didn't report any errors.
Crankshaft sensor was not Bosch but some other manufacture,while MAF was Bosch
I've gone to Alfa service again while the CHECK ENGINE was on and still no clues what is the problem.The computer was showing error on everything.They said it could be non Bosch crankshaft sensor and that something is shocking ECU and insisted to reattach old Crankshaft sensor which is Bosch and by their opinion it is OK and see what problem will appear (cut at idle or driving).Now with old Crankshat it cuts out while driving,and still no clues what is going on.They said it will be very hard to find a problem.
While this is not standard Crankshaft sensor problem because I can turn on the car immediately or maybe it is starting to fail but no one has no clue what is the problem.
I searched whole internet, I have workshop manual I've checked everything,asked everyone I can and no one knows whats the problem
Please if someone has some experience with this I would appreciate any information.I'm about to loose my mind.
Last edited by sexan147; 19-10-13 at 00:02.