Engine always die off when cold start

[Tailgatepro]

 

My engine always die OFF when cold start no matter in morning or afternoon. As long as the engine rest more then 6~ 8 hrs, this problem always there since 1 years back.

 

-Already done change of spark plug, fuel pump, oil change, clean carbuter,bigger battery etc. It since daily route to crank the engine twice before it stable.

 

car: 2 year old only, old change 8k ~10k.

[Chucky2007]

Cleaned throttle body before?

[Gary84]

yes very likely throttle body dirty....I had the same prob as well....

Is ur car tuned??

[Mona-vie]

Stock car? How about your engine temp sensor. Is it OK? MAF sensor? Any black smoke?

 

Cause if black smoke means the engine is running too rich, thats why dying off. IT can happen if MAF sensor is not working properly or engine temp sensor not working (resulting in ECU running default mode for temp which may be too rich).

[Tohdj]

My engine always die OFF when cold start no matter in morning or afternoon. As long as the engine rest more then 6~ 8 hrs, this problem always there since 1 years back.

 

-Already done change of spark plug, fuel pump, oil change, clean carbuter,bigger battery etc. It since daily route to crank the engine twice before it stable.

 

car: 2 year old only, old change 8k ~10k.

 

check if your battery needs to be changed.

[Watwheels]

So many ppl like to describe their engine die lah, die off lah(must be damn a lot hokkien beng or prc beng are members here). Dan put it in a casket and bury it or better still cremate it.

 

Come on lah. This is a car forum, if foreign car enthusiast visit MCF they will be scratching their hairs off wondering how the engine can "die".

Use the correct term engine stalled.

Edited June 27, 2011 by Watwheels

[Tailgatepro]

Cleaned throttle body before?

hi, yes cleaned Throttle body before.

what i mention "carburetor" is wrong, should be T.B

[Yeobh]

Combustion need air, fuel and sparks, assuming yr engine compression is ok. Looks like you taken care of most of them except spark plug cables and checking connection at the ignitors.

I suspect yr spark plug cable(s) l carbon conductord may have suffer fracture due to poor handling ( or aging )when changing spark plugs.

Use a digital voltmeter to measure each cable resistance and lightly bend each one when doing the measurement. If any one has fluctuation in the reading chance there is a fracture conductor.

[Mona-vie]

Combustion need air, fuel and sparks, assuming yr engine compression is ok. Looks like you taken care of most of them except spark plug cables and checking connection at the ignitors.

I suspect yr spark plug cable(s) l carbon conductord may have suffer fracture due to poor handling ( or aging )when changing spark plugs.

Use a digital voltmeter to measure each cable resistance and lightly bend each one when doing the measurement. If any one has fluctuation in the reading chance there is a fracture conductor.

 

For spark plug cable, its less of broken conductor. Its more of insulation issue. As the cable ages, the insulation tends to hardden and crack. this causes the cable to short out and hence misfiring. This cannot be checked using multimeter.

 

However, the car will have rought idling due to misfiring.

[Howeytan20]

Might be the O2 sensor dirty causing this problem.

[Tailgatepro]

i just bought a piggyback and tuned it myself. Is ok now, is due to higher fuel cause it. thanks for all the advise.

[Ithunk]

So many ppl like to describe their engine die lah, die off lah(must be damn a lot hokkien beng or prc beng are members here). Dan put it in a casket and bury it or better still cremate it.

 

Come on lah. This is a car forum, if foreign car enthusiast visit MCF they will be scratching their hairs off wondering how the engine can "die".

Use the correct term engine stalled.

 

yes the correct term is stall

 

 

[Yeobh]

That's what many laymen are make to believe " plug in the ODB reader and you shall get the answer". Presently workshop ODB readers are just not that smart!! If they have the built-in smart abilities to diagnose and pin point the actual locations and source of problems ( maybe only for some small minute problem) makers of such instrument will logically want to milk the industry by only renting them out at high prices.

With such believe that OBD reader can do wonders ( even some mechanics also think like wise ) most of the time car owners suffer more loss in time and money due to mechanics blindly following the OBD code to do replacement and repair.

 

In my opinion, all auto specialty tools/instruments can only perform well only in the hands of skill professional mechanics and not grease monkeys. Plug and get answer is still not here yet.

[Good-Carbuyer]

That's what many laymen are make to believe " plug in the ODB reader and you shall get the answer". Presently workshop ODB readers are just not that smart!! If they have the built-in smart abilities to diagnose and pin point the actual locations and source of problems ( maybe only for some small minute problem) makers of such instrument will logically want to milk the industry by only renting them out at high prices.

With such believe that OBD reader can do wonders ( even some mechanics also think like wise ) most of the time car owners suffer more loss in time and money due to mechanics blindly following the OBD code to do replacement and repair.

 

In my opinion, all auto specialty tools/instruments can only perform well only in the hands of skill professional mechanics and not grease monkeys. Plug and get answer is still not here yet.

Agee. Many years back when my Uno used to stalled when the engine warmd-up. The workshop using computer to trouble-shoot reported all in order.

Edited October 17, 2011 by Good-Carbuyer

[Kawarides]

You are quite pro.... can self tuned

Edited October 17, 2011 by Kawarides

[Yeobh]

I have been showing mechanics and customers how to do this simple resistant test for donkey years to be precise since 1976. I hope I have not been teaching them the wrong method of testing

 

PS Pl read this article http://www.ehow.com/how_7510049_test-sparkplug-wires.html

Edited October 17, 2011 by Yeobh

[Good-Carbuyer]

I have been showing mechanics and customers how to do this simple resistant test for donkey years to be precise since 1976. I hope I have not been teaching them the wrong method of testing

 

PS Pl read this article http://www.ehow.com/how_7510049_test-sparkplug-wires.html

Should the spark plug wire resistance readings be pro-rated to the lengths if no data/specification readily available?

[Yeobh]

Yes, I have forget the details , it's xxohm/feet. The resistance is diffferent for silicon, copper and carbon fibre type. Try doing a google search , chance you will get the info.