Hi,

I'm having problems with my 1.4 1989 Sunny.

Recently, the engine has started cutting out at low revs. it seems to drive fine unless you let off the throttle. i got a new distibuter cap and filter put in, which seemed to help a bit, as they were both in desperate need of changing, but i don't think it was the primary problem.

Nothing has been done to the spark plugs, or the carburettor..... possible reasons for the problem??

could it possibly be that there is a blockage in the carburettor, meaning there isn't enough fuel getting to the cylinders. presumably this would lead to a lean mix, resulting in low power. at low revs the pressure differential in the carburettor would be lower, therefore not sucking enough fuel through???

when the engine is running at idle, it shakes alot. would this be because of one of the cylinders is not firing?

I would be extremely grateful of some help!!

many thanks,

Pete

Hi Mate,

Was it a new air filter or fuel filter that you had put in?

Cheers Michael

sorry, it was a new air filter.

i was just reading that old nissan micras have a problem with the throttle body:

http://www.micra.com.au/technical-ar...ring-guide.php

do you think this might be applicable to my sunny?

once again, many thanks for any help!!

i know old jap cars especially nissans are great cars but 1989,i think it's worth more in scrap metal than keeping it?,don't throw money or time at it,move on.

try removing the fuel filter and connecting the pipes together minus any filter and see if this sorts out the problem,then drive down to the scrap metal dealers not the car yards,because it's worth more has metal than what a car yard is going to pay you,and don't forget your tax disc

I agree with you, it's not really worth it! but i'm a student, and by definition am skint!

i'm asking in the hope that there may be something that i can do to keep it going for a little longer!

there's been lot's of stuff on the internet about micras losing power, and many have apeared to have been fixed with minimum cost.

many thanks for the help.

right then because your a student and mr brown seams intent into driving students into permanent debt,when you changed the distributor cap did you replace the rotary arm,if you didn't then try scratching the metal arm with a key or something metal then replace it if it runs a little better then buy a new rotary arm there more pence than pound.,it should only go on one way so don't worry about removing it,secondly if this didn't work then as i mentioned above what i used to do with old jap cars is remove the fuel filter it is located on the bulkhead on micras and pull the filter off and fasten all the pipes together,when you remove the filter please keep a note of the flow of fuel it should have arrows located on the filter,if you replace the filter and it has the wrong flow it would have fuel starvation and stall and again see if this works if it does then buy a new filter.thirdly(is that a word)remove the air filter and buy some carb cleaner (DO NOT LEAVE THE ENGINE RUNNING)and spray the flap which is located under the air filter if you use this carb cleaner please don't inhale it is highly toxic.tell me how you get on.

Cheers mate,

i'll have another look at the rotary arm!

i bought some redex (for petrol carb engines) and put it in with the petrol, Reved the engine quite hard for a couple of seconds and have driven around for quite a while...... so far it hasn't stalled again! i'm not feeling too hopeful though!!! don't fancy breaking down on the way to an exam!

i'm thinking i might have a go at putting some redex through the air intake of the carb? under the air filter? like it says on the bottle. any advice on doing that?

many thanks,

pete

just a quick update to help anyone else in my situation:

I changed the fuel filter (£2.50 on ebay).

found that the pressure in the petrol tank seemed too low, as when opening the cap a large amount of air is sucked into the tank (more than the usual hiss). i left the cap in a glass of left over redex, and now the valve on the fuel cap seems to work much better. the petrol tank pressure is appears to be held only slighty lower than atmospheric.

my guess is that the fuel cap pressre valve was not keeping the tank at constant pressure. the low pressure in the tank meant that the difference in pressure between carb and tank was too small to pull any fuel through.

anyway, long story short. it seems to be working fine..... i'm not really expecting this to be the end of it, but it's much better!

^ good to know that!