Engine Misfire

Hungry_Minder · April 9, 2013

Hi,

I have a problem with my ck2 is misfiring when I start the car in the morning.this is a new problem came day before yesterday.

when I accelarate I cannot see tha mis.But when I stop the car (and gear D or N) I can feel car is shocking.Not continuosly but with an interval.Sometime 2/3 times per miniute.When I drive I cant feel that.

I checked engine oil,plugs and all are seems fine.

What can be the reason for this?

Thanks

NZer · April 9, 2013

Is this a Carb? If it is clean the Dizzy and the rotor and check

Hungry_Minder · April 10, 2013

Is this a Carb? If it is clean the Dizzy and the rotor and check

EFI model

NZer · April 10, 2013

Have you checked your leads? and to see if they are in good condition? Also check your plugs at the same time.

Hungry_Minder · April 10, 2013

Have you checked your leads? and to see if they are in good condition? Also check your plugs at the same time.

Hi NZer,

I am not really a expert on this field.What did you mean by leads?

Rumesh88 · April 10, 2013

Hi NZer,
I am not really a expert on this field.What did you mean by leads?

He meant plug wires. See if they are cracked or damaged. If you can measure the resistance of each you should get readings like 5kohm to 15kohms. If one is bad you will find it open. How is your idle RPM? Is it at the correct setting? When did you last cleaned your fuel injectors?

maheshw · April 10, 2013

+1 when was your last efi tune up? fuel filter replacement ? is this taking plc only in morning cold start ?

Hungry_Minder · April 10, 2013

+1 when was your last efi tune up? fuel filter replacement ? is this taking plc only in morning cold start ?

This car I bought 6 motnhs ago.I really dont know when he done the EFI tuning last time?

I serviced the car last december changed engine oil and oil filter

most of the time morning cold start.When I drive and stop the car in traffic I can feel that mis

Hungry_Minder · April 10, 2013

He meant plug wires. See if they are cracked or damaged. If you can measure the resistance of each you should get readings like 5kohm to 15kohms. If one is bad you will find it open. How is your idle RPM? Is it at the correct setting? When did you last cleaned your fuel injectors?

I guess plus wires are fine

ideal RPM is 700 as mentioned under the bonnet.of course I can see water is comming out of the silensor so I thought tune up is fine

MV-5 · April 10, 2013

Scan ur car for misfire error codes, i think error code supports to identify the cylinder (if it is limited to one) and you will be able to identify whether it is a "lean misfire" or not.

if misfire is limited to one or two cylinder then you can eliminate lot of possibilities(most probably then it is a injector related or electrical related).

maheshw · April 10, 2013

This car I bought 6 motnhs ago.I really dont know when he done the EFI tuning last time?
I serviced the car last december changed engine oil and oil filter

most of the time morning cold start.When I drive and stop the car in traffic I can feel that mis

Yes do a scan, so the report might give you some indications on what faild on your system, also will it happen while the vehicle is on idle & running status in Gear D,N,& R with out acceleration ?

Hungry_Minder · April 10, 2013

I did the scan and they told me its a lean misfire
I looked the cables around Nugegoda Wijerama but couldnt find a matching one
you guys know any place for me to find it?

Thanks

MV-5 · April 10, 2013

if you are sure that it is a "lean misfire", dont replace the cables, then the problem is air/fuel mixture. but root cause might be a sensor or anything.... but no need to replace the cables.

these are the probable areas.

EGR valve problem

Intake Manifold Gasket leak

MAF Sensor.

Fuel pump or pressure regulator problem

Fuel filter related problem.

Edited April 10, 2013 by MV-5

Hungry_Minder · April 10, 2013

case is I can hear small sparking sound from cable(s)

they told me there is a leak.I can see that when i can hear that sparking sound engine is shocking

MV-5 · April 10, 2013

case is I can hear small sparking sound from cable(s)
they told me there is a leak.I can see that when i can hear that sparking sound engine is shocking

then try to observe this at night (dark env), then you would be able to see this sparks.

anyway if it is a problem related to cables ,always the misfire should be in a single (or might be two) cylinder. then you may get a error code which we can identify the cylinder.

MV-5 · April 10, 2013

and the other thing is machan, if the misfire is due to ignition voltage leak, then you would feel the misfire when you are trying to accelerate quickly the vehicle.if the misfire is only present when the vehicle is idle then it is most probably a lean misfire.

Hungry_Minder · April 10, 2013

HI MV-5
I cant feel the misfire when I accelerate quickly.Only when I start the car and when car is idle

MV-5 · April 10, 2013

HI MV-5
I cant feel the misfire when I accelerate quickly.Only when I start the car and when car is idle

ok mate, then good mechanic will easily troubleshoot the problem, if you can find lancer specialist they might replace the cable temporally with good set of cables that they have to verify this.

sometimes bad plugs might cause to ignition spark leak(simply spark will follow the lowest resistive path).

but still this kind of misfires are categorized as "ignition misfire". then better to re-scan before you go to part replacement.

the problem our local mechanics(most of, not all) has is they dont follow proper troubleshooting format. they just try to replace parts (trial and error) until problem got fixed.

Hungry_Minder · April 10, 2013

Thanks a lot MV-5
my problem is these days none of mechanics are working

is that dangerous me to run the car? I guess i have to wait until next weekend them to back again to work

do you know any lance specialist pls PM me the details

the problem our local mechanics(most of, not all) has is they dont follow proper troubleshooting format. they just try to replace parts (trial and error) until problem got fixed. - Agree with you on this

Edited April 10, 2013 by Hungry_Minder

Rumesh88 · April 10, 2013

I guess plus wires are fine
ideal RPM is 700 as mentioned under the bonnet.of course I can see water is comming out of the silensor so I thought tune up is fine

case is I can hear small sparking sound from cable(s)
they told me there is a leak.I can see that when i can hear that sparking sound engine is shocking

Contradictory! isn't it. Well what convinced you to guess that the plug wires were fine?

Edited April 10, 2013 by Rumesh88

MV-5 · April 10, 2013

sorry mate, i am far a way from Colombo (in middle of Galle district). i think other members will help you to find out a good place.try to pm lancer owners (members)

is that dangerous me to run the car? I guess i have to wait until next weekend them to back again to work

yeah, technically it may harm Cat converter.but in this case also i would prefer our experts ideas.

MV-5 · April 10, 2013

Contradictory!

the other contradiction is that, in the first scan they have identified this as a lean misfire, but they are trying to apply a solution for a ignition misfire.

Rumesh88 · April 10, 2013

If the miss happens only during idle then there is no harm in driving around for a few days. If one or more of your plug wires are bad then have them replaced before going further. Because it is easy to identify and isolate a faulty plug wire.