I have to hold down accelerator to start runs very poor when cold, trottle sticks occasionally, strong smell of petrol when i turn it off, all sensors on engine are new, new coil packs and ht leads has been on renault computer and no fault found please please help me
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black smoke on acceleration is from a rich running engine. the fuel smell can also be from the same but please make sure u dont have an extermal fuel leak. that could be dangerous and a strong smell would occur. have ur engine computer system scanned for possible codes or if its a carbeuretor sounds like the float may be sticking or a msadjusted choke or carb assembly. hope this helps
For the RPM's jumping up and down i would replace the throttle position sensor. If it smells like bad gas or rotten eggs these are signs that the cat. converter is going bad. For the poor gas mileage replace the fuel filter.
you have a bad injector, if you have A... as it states on the top of the motor 2.8, 3.1 L MULTI PORT and dies or idles really rough and the exhaust smells like strong gas. most likely you have an injector that has shorted or is shorting out and from my experiences usually after a road trip or using fuel injector cleaner or buying a used car. it will cause half the motor to not run or run poorly VERY POORLY or even burn out 1 injector fuse out of 2 under hard acceleration or idles but as soon as you touch the gas pedal dies. but only if it is a MULTI PORT fuel injected motor. ive heard you want to try and replace them with bosch injectors out of a 2.9l ford bronco/ranger. only attempt if you got the mechanical know how sometimes if not done right will leak gas because of the injectors being kinda different length. research before attempting.