Hi guys

New issue with my S60 T5 2001 this morning (89000miles)...Since 1 or 2 day, I got the check engine light as well as emission control written but the car was running fine...
I thought the gas cap was not tighten well and that issue will go by itself...
But not at all. This morning, the car start fine ( but i noticed faster on the cold idle than before,2500rpm !Then after 7 to 10 seconds the revolution start to drop and then a very rough idle till it dies !!!
I restarded the car, same thing but i pushed a bit on the accelerator pedal when it starts to give the rough idle, no increase in revolution at all....and the idle become so rough that i turned the ignition key off .
I had time to check for battery and alternator 14V,so ok.
Any ideas. A huge thanks for your help in advance

 

No reply !!! I would add some precisions: I do not suspect the ETM because I never saw a revolution fluctuation at all ( at idle or running speed) .
It looks more at gas pressure problem , fuel pump or intake leak. But it is very difficult to diagnose...i do not have a pressure gas tester!
Yesterday i got a scanner Creader4 from a friend. It did show P1171 and P0101. Which are related to MAF. But I have read that with a MAF issue you still able to drive the car, me no !

With the scanner I also erased the 2 codes. Then i started the car and it seems running better (it started fine and hold the idle speed around 1000rpm for around 8 to 10 seconds ,I could also accelerate witn the gas pedal. After this time it started to shake badly so i switched off the iginition!
This rough idle I am speaking looks the same as when you disconnect the battery and reconnected it. The electronic try to find the right ignition timing....

 

You may need a new MAF. I'm no expert but that what I saw other people to to fix the first code.