Hi, I am having a problem with my 1994 nissan primera. It is a 1.6i 16v manual, abs and pas. It has started having an unusual problem, when I stop the car at say, traffic lights, the revs of the car is still high, as though the choke was still on but after about 4 or 5 seconds, the revs slowly return to idle. If I rev the accelerator pedal, the same happens. I have looked around the carb to see if there is anything that might be stuck, like the cable or linkages, but cannot find anything at all; I any case, it seems too consistent and deliberate a problem to be something sticking. I have also noted a rise in fuel consumption of about 8% on a full tank. Has anyone any idea what the problem. I don't trust most garages these days so before I think about going to one, I would like to try and fix it myself or be armed with the info as to what it is before going to the mechanic. Please can you help. Thanks. Soundssupreme
Answer
In the last few years of carbs, all sorts of devices were fitted to comply with emissions regulations, and in many cases they were mechanical linkages operated by vacuum diaphragms so that they were sensitive to inlet manifold depression etc. If the problem has started to happen suddenly I suspect one of these has stopped working properly, and most of the time it’s the vacuum connection.
Check all the small rubber hoses going to all the complicated bits that look as if they were bolted on to the carb as an afterthought. If they’re all OK, check the air flter element and change it if it’s looking dirty or oily.
Keywords:
carb-problems, nissan-almera-problems