Hi all.
Our Matiz seems to have a slight hesitation or flat spot when accelerating. Irrespective of what gear you are in, there seems to be a sudden increase in power when a certain RPM is reached, then the car really takes off (if that is the right word for it!).
If I put my foot down a bit more to try and get quicker acceleration, there is sometimes a momentary mis-fire before it picks up speed. If I am gentle with the throttle, this doesn't happen.
Is this just a characteristic of the engine, or an indication of a problem? Otherwise, all appears to be OK.
Regards.
hello,
do an idle reset first and see how it comes. might sort things out for you. if not you will have to check other components, but that's then
Thanks.
There appears to be some discrepancy between the procedure for this in the sticky section above, and in general posts on the subject. How do you know if its actually doing anything?
Cheers.
(02-05-2011 11:58 AM)little_reggie Wrote: [ -> ]Thanks.
There appears to be some discrepancy between the procedure for this in the sticky section above, and in general posts on the subject. How do you know if its actually doing anything?
Cheers.
if existing problem was due to incorrect idle issues, the improvement should be noticeable straightaway after idle learn has been performed correctly. the acceleration would be much smoother for once.
if not, then there is a chance that the process was not performed correctly, or another issue involved here.
(28-04-2011 10:17 AM)little_reggie Wrote: [ -> ]Hi all.
Our Matiz seems to have a slight hesitation or flat spot when accelerating. Irrespective of what gear you are in, there seems to be a sudden increase in power when a certain RPM is reached, then the car really takes off (if that is the right word for it!).
If I put my foot down a bit more to try and get quicker acceleration, there is sometimes a momentary mis-fire before it picks up speed. If I am gentle with the throttle, this doesn't happen.
Is this just a characteristic of the engine, or an indication of a problem? Otherwise, all appears to be OK.
Regards.
Third sticky:--
http://www.daewooclub.co.uk/forums/showt...p?tid=8425
You could get some clues here.
Good luck
Erich
It looks like this might have been something to do with the spark plugs. I test drove the car immediately after fitting new ones and the problem appeared to have disappeared. Of course, I could just be hoping that.
The only thing I did notice was that the plugs weren't screwed in very tight at all, and undid with almost no force. Also, they were not OEM plugs. I haven't yet checked if they were even the correct plug for the car, but maybe not.
(09-02-2012 09:33 AM)little_reggie Wrote: [ -> ]It looks like this might have been something to do with the spark plugs. I test drove the car immediately after fitting new ones and the problem appeared to have disappeared. Of course, I could just be hoping that.
The only thing I did notice was that the plugs weren't screwed in very tight at all, and undid with almost no force. Also, they were not OEM plugs. I haven't yet checked if they were even the correct plug for the car, but maybe not.
more important, is using sparks with correct gap for this engine. it should be around 1.1 mm.
but in all cases, fresh plugs will feel better than old ones, but that does not mean you have the right setup.
Check that your airbox tube (from top of the air cleaner to the throtlle body) has no cracks where extra air could sneak in and mess with the map sensor calculations. I found once that tube from the PCV had popped out once. Even though it was originally glue it. Also there is another pipe directly under the main tube , mine split. All I did was reversed it still there today
(09-02-2012 03:00 PM)ucould2 Wrote: [ -> ]Also there is another pipe directly under the main tube , mine split. All I did was reversed it still there today
By the looks of it, the small pipe has been repaired with duck tape in the past, but is showing signs of perishing again. What does it do? I haven't looked closely at it, but it just seems to run from the filter box next to the main pipe and join onto it further up.
I can accept that explanation.
Anyway, there is no doubt that this hesitation has now gone, so I can draw a line under this.
Thanks,
Reg.
