306 XSi engine cut-out

I have just bought a second hand 306 xsi (2 litre, 16v version). When
accelerating, foot hard down, the car suddenly stops accelerating. If I
lift the peddle, then gently reapply, the engine will generally kick in
again. However, sometimes it just cuts completely and I loose brakes
and power steering. I then have to turn the ignition to get it started,
which it does no problem. Also, when this problem occurs, the engine
idles erractically and cuts-out while idling. These problems are
intermittent, the car will sometimes work for a week or two without
problems.

What is the problem??

Any thoughts would be appreciated.

 

ECU UNIT?

 

Coil pack ???
Fitzy

 

Hi could be anything from ECU, coil packs blown up your ECU, need new
sparks, vacuum leak from one of the hoses, O2 sensor is knackered, stepper
motor or potentiometer blown. Take your pick. I had all of the above
symptoms on my 306 XSi 8V and either replaced or checked all of the above
myself. It would either cut out from cold or when drving along.

I finally sorted it by replacing the sparks, and putting in Greased
Lightning 12,000 mile fuel system treatment and Greased Lightning Instant
engine treatment. I've had no problems since I did this. I highly recommend
this stuff (check on ebay or google for it).

 

Many thanks. Spark plugs are due a change so I will start there.

 

Clean all air pipes and buy a new Idle control valve.

I had this problem on my 306 cabriolet, and it vanished once i done
both those things... got the tip from 306 forum...