The most common causes for slow acceleration in Citroen C4 are clogged air filter, dirty mass air flow sensor (MAF), clogged fuel filter, fuel pump malfunction, faulty oxygen sensor, dirty throttle body, worn spark plugs and clogged catalytic converter. Less common causes are faulty throttle position sensor (TPS), bad ignition coils, dirty fuel Some cars built between 25 April 2016 and 29 August 2016 that have an automatic gearbox might have a problem with the actuator, which could cause trouble when changing gear. Nail the accelerator to the floor, then push a little harder as the pedal will go about another couple of centimetres and let it accelerate and change up to third on its own. Once it hits third back off and drive normally. You should notice the car will change gear a lot better after this. Citroen C4 Cactus Tuning. Citroen wanted to make a small SUV car aimed at millenials and came up with the Cactus. One of few cars to have soft air bump panels on the site it clearly stands out, and some may dislike the styling but it does find many fans among the target market. The Cactus, which actually looks beefier than a C4 model, weighs 200 kg (440 lbs) less than that, tipping the scales at only 965 kg (2,127 lbs) when fitted with the basic engine and a manual gearbox. 88 months. [report] [news] Thursday 7th January 2021. Morning all, My mum's C4 Cactus is suffering from a stiff gear change at cold start. Symptoms are thus: - after a cold start, such as this Citroën C4 Cactus Flair BlueHDi 100: in numbers. Price £18,195 Top speed 114mph Acceleration 0-62mph in 10.6 seconds Combined fuel consumption 80.8mpg CO 2 emissions 95g/km Eco rating 9/10 Cool N.B. : Unlock the ball-joint keys at "d", before clipping the ball-joints onto the gear selection levers. Conditions required before adjusting: Immobilise the gear lever in the neutral position Using tool [1] Put the gearbox in neutral; Refasten: The sleeves of the control cables (7) on the support on the gearbox side grU0OWn.