Matiz stalling

itarumaa

Does someone want to take a quess why my Matiz likes to stall the engine, when

a) engine is completely warmed up
b) I brake to stop and push the clutch down, engine dies.

if I brake using the engine, not normal brakes, then no problems.

Any ideas welcome,

oh yes and car is Matiz 99, 800cc, 62t miles, new air filter, sparkplugs changed recently.

itarumaa

Fixed, I adjusted the gas wire a little bit tighter, so it does not drop revs so low and car does not stall,

rugbyman

Hell o, helpful mechanic types

I have a Matiz, driving one day a misfire came into it. off on no 3 cylinder.

have replaced all three plugs, misfire relains.
With another plug inserted into the plug lead and left lying on the engine the spark looks healthy to me.

A fellow had a look at it, assures me it is an injector problem. Others do not agree but they did not look at it, just endured me on the phone.
Anybody have an opinion.?

My wife is driving it, running on two cylinders. I am sure there are some posh motor heads on here wondering how one would notice the difference!

Any ideas?
thanks in advance, Rugbyman

mullingar

As the mods would say, please dont dig up old threads, start a new one.

Was the engine compression tested?
Was the spark checked against the other spark plugs for spark strength??

rugbyman

mullingar wrote: »

As the mods would say, please dont dig up old threads, start a new one.

Was the engine compression tested?
Was the spark checked against the other spark plugs for spark strength??

thanks for reply.

compression not tested by me,
spark strength not tested by me , would not know how to do that.
As I said, an old plug was sparking merrily.

My question is whether any readers have experience of or heard of an injector "failing"

regards,Rugbyman

mullingar

Yes injectors do fail for one of these reasons:

Wear & tear: Failing electrically/mechanically. They open and close every single turn of your engine, so they last millions of injections cycles.
Blocked-up : Each injector has an opening the size of a needle tip, so any debris can clog them.

Fuel injector cleaner *may* help, but if its really clogged up it needs to be removed and either cleaned or replaced

Some injectors can be cleaned out with reversed compressed air when electrically held open (direct connection to battery)

itarumaa

Have you checked all the cables between the coil->distribution cap->sparkplugs.

I had an problem with a cable between coil and distribution cap and the car was therefore not running properly.

I do not think that there would be any injector issues, seems a bit far fetched for me.

Also driving a Matiz running two cylinders sounds a bit extreme to me:) Must be interesting to try to get over the hills:)

I am also really really happy I don´t drive Matiz anymore:)

rugbyman

mullingar wrote: »

Yes injectors do fail for one of these reasons:

Wear & tear: Failing electrically/mechanically. They open and close every single turn of your engine, so they last millions of injections cycles.
Blocked-up : Each injector has an opening the size of a needle tip, so any debris can clog them.

Fuel injector cleaner *may* help, but if its really clogged up it needs to be removed and either cleaned or replaced

Some injectors can be cleaned out with reversed compressed air when electrically held open (direct connection to battery)

Hello Mullingar,
I added a bottle of injector cleaner to half a tank and have only driven about 20 miles yet. today i will do more than that. I know its a piece of string question but if it is going to work when should it happen?

to do the reversd compressed air trick, is this with the injector in place,?,where does the air get fed in?

Thanks for your help so far.
Rugbyman

mullingar

You will also need to rev it hard to maximize the amount of fuel going into the injectors. Letting it just tick-over wont budge anything that maybe blocking your injector.

Did you check the spark strength???? <<-- VERY IMPORTANT

If the blockage is still there, the injector must be removed and cleaned/replaced.
The only way to remove any debris is to remove it from the engine, power it up and blow compressed air backwards.

Also, how did you diagnose it was cylinder #3?????

rugbyman

mullingar wrote: »

You will also need to rev it hard to maximize the amount of fuel going into the injectors. Letting it just tick-over wont budge anything that maybe blocking your injector.

Did you check the spark strength???? <<-- VERY IMPORTANT

If the blockage is still there, the injector must be removed and cleaned/replaced.
The only way to remove any debris is to remove it from the engine, power it up and blow compressed air backwards.

Hello Mullingar
Thank you for speedy reply. While the exhaust was being repaired in an ex Daewoo garage, they had a quick look and diagnosed a faulty coil.

myself and a friend checked around, a new coil was 150 euro and we were not certain of the diagnosis. taking off the plug lead made no difference to the car, while removing no 1 or no 2 did make a difference. So def No 3 ,but what problem? still looked like coil, but we replaced all three plugs.
so it could still be faulty coil, put another plug in the no 3 lead ,left it sitting on the engine and it sparked merrily.
I have not checked the strength of the spark, if this is simply a visual test, I can do it, by taking each one off and comparing them. I am not a trained mechanioc but have been mucking about with cars for 30 years, and to me a healthy looking spark is just that.

A Polish man up my street has just set up a garage. He assures me it is an injector.

I intend to do 40 miles today, if no improvement will look about for an injector, or try the air trick.
Thanks again, Rugbyman




Also, how did you diagnose it was cylinder #3?????

xxx

rugbyman

Sorry Mullingar

my reply got mixed up in yours, hope it makes sense.
Obviuosly I am no better a typist than a mechanic.
Rugbyman

mullingar

No prob,

Just edit your post and move the text " /

" from the end of your post to where I finished talking

mullingar

Try this to see if its the coil pack, simply swap the coil pack from #3 with either #1 or #2. If the problem follows its 100% the coil pack with a weak spark.

If the problem remains, its probably the injector