Citroen C3 2003, automatic petrol 1.4 sx Under load the engine stutters and makes the car jerk. This is not really an issue at very low revs, when taking it really easy. It's not noticeable at high revs, so been driving it in sport mode to keep engine revving high until I can get time to sort. The oil smells a little of fuel and the exhaust can smell a little of petrol as well. I'm thinking it may be a problem with the spark plugs and am going to replace them next week. If not that then having read the common problems will try the petrol injector. What doo you think, worth trying the spark plugs, or just go straight for the injector? Thanks for you help, Chris.