I have recently acquired a 156 2.5 V6. Car is pretty old as she is on a 98 plate, but has lots of history and only 68k on the clock.
She has not been idling right since I bought her and sometimes when at traffic lights the revs stutter more and more and she stalls. Also sometimes happens when parking up and moving car into reverse.
Have had the throttle body cleaned out which was a bit dirty but not excessively so and the problem persists.
Have read a few threads on this issue and tried driving car with the MAF unplugged this evening . As a result the revs seemed much more stable and the car did not stutter or stall once.
I also noticed on the journey home however that the car took an age to get up to temperature and even after a fifteen minutes motorway drive was only half way up to normal temp. From what I understand this could be relating to the lambda sensors,which can also contribute towards a rough idle?
Fuel consumption has seemed pretty heavy on the car so far too. 3/4s of a tank of fuel have so far provided around 190 miles driving. Have no benchmark however not being familiar with the car yet and this could be just normal BUsso V6 behaviour!
Do any of you more mechanically minded members have any suggestions?
Looks as though cleaning the MAF might be the next step. Anyone know of an dummys guide as to how to disconnect it? I have done it before on my old TT and am sure I can manage it on the 156. If this doesn;t work then perhaps try replacing it with a new one?
Could the car's hesitancy to get up to temperature be a result of having the MAF unplugged on this journey, or are the two unconnected and does it indicate a faulty lambda sensor or temp sensor?
What would you do next to try to put things right?
The car only cost £900 so I don't want to throw too much money at it, but Sal and I are going to drive it round Europe for 2000 miles in a few weeks so want to get her running right.
Any help appreciated.