406 in the morning when it's cold

My 2.0 Petrol starts up, runs for say 30 sec, then starts running on 3 (or
maybe even 2?) cylinders closeley followed by the antipollution alarm
bleeping frantically. The only way I've found to overcome this is to
switch the car off and leave for 30min or so and try again. This only
seems to happen when it's 5-10 deg C outside.

(The fault indicator takes a few days to clear, but I think that's related
to the number of on/off cycles for the engine)

This has happened occasionally from new, the car is 5 years old now with
113,000 miles on the clock.

Anyone any ideas or experiences?
Thanks
Nick

 

I'm guessing here but I think the anit polution alarm is cause by the
incorrect mixture.
By the way you describe it it would seem that the car is over fueling. This
could be a number of reasons.
I would sugest you get a garage to read the fault codes and tell you if you
have any obvious faults. Otherwise it may well be a lot of sensor changing
before you find it.

 

Hi,
I had exactly same problem on my Pug 406 2.0 ST from december 2002.

When cold 30-60 seconds after a cold start, the Engine illuminator or the
Board computer issued a catalyator or an anti pollution error. The engine
was swinging!!!. Sometimes the motor had to be turned off and on again to
gain torque.
( I assumed it was running on less than 4 cyllinders)

After 3 times at the garage, they concluded that the motor needed a repair
of the lifters. They had seen it a few times before. They repareed it within
warranty and the motor is now running perfectly.

regards
Allan