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Car sometimes can sometimes cannot start

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freak:
Hi guys

Have u faced this kind of problem? My car can crank and engine starts for half a second then die. What could be the problem?
Spark plugs?
Any kind of relay?
Batt was just changed last month.
Mileage is now 105k.

Thx for the help.

NSman:
ignition coil faulty? Spark plug misfire? or Trottle body is too dirty.. no choice, sent to workshop to get answer.

m_k_tang:

--- Quote from: freak on September 23, 2011, 08:09:15 AM ---Hi guys

Have u faced this kind of problem? My car can crank and engine starts for half a second then die. What could be the problem?
Spark plugs?
Any kind of relay?
Batt was just changed last month.
Mileage is now 105k.

Thx for the help.

--- End quote ---

Are you able to drive your car eventually even though you cranked the engine and die off? Have you check whether battery connections are tightened? When was your last change of spark plugs? The problem can come from many things such as fuel pump, fuel filter, MAF (air flow sensor) and air filter, ignition coil/s, spark plugs, etc etc.... Any engine check light? What is the battery condition or CCA (cold cranking amperes/power) when you bought it? Did the battery shop show you any reading to show that the battery is fresh and/or in new condition? Otherwise, you have to go to workshop especially those shops with diagnostic equipment to check your car.

Btw, you can still start your car with dirty throttle body but just that the RPM especially idling is not very stable as carbon and dirt may have clogged the butterfly valve...

freak:

--- Quote from: m_k_tang on September 23, 2011, 10:56:50 AM ---Are you able to drive your car eventually even though you cranked the engine and die off? Have you check whether battery connections are tightened? When was your last change of spark plugs? The problem can come from many things such as fuel pump, fuel filter, MAF (air flow sensor) and air filter, ignition coil/s, spark plugs, etc etc.... Any engine check light? What is the battery condition or CCA (cold cranking amperes/power) when you bought it? Did the battery shop show you any reading to show that the battery is fresh and/or in new condition? Otherwise, you have to go to workshop especially those shops with diagnostic equipment to check your car.

Btw, you can still start your car with dirty throttle body but just that the RPM especially idling is not very stable as carbon and dirt may have clogged the butterfly valve...

--- End quote ---

Hi

Yes manage to get it started after a few tries interval of 2-3mins. I have not changed the plugs, will do so asap together with my servicing.
Do you have any recommended workshop with all this diagnostic stuff?
Its been happening since last week, sometimes 2 days once, sometimes 3 days once.
This morning i manage to go to Point A (park and off engine). Then from Point A to B (park and off engine). From Point B that is where it start for half a second then dies off. Eventually manage to start it again.

m_k_tang:

--- Quote from: freak on September 23, 2011, 01:16:42 PM ---Hi

Yes manage to get it started after a few tries interval of 2-3mins. I have not changed the plugs, will do so asap together with my servicing.
Do you have any recommended workshop with all this diagnostic stuff?
Its been happening since last week, sometimes 2 days once, sometimes 3 days once.
This morning i manage to go to Point A (park and off engine). Then from Point A to B (park and off engine). From Point B that is where it start for half a second then dies off. Eventually manage to start it again.

--- End quote ---

The immediate thing you can do right now is to check your battery terminals for loose connection. As for those workshops with diagnostic equipment, my company has tied up with 4 of these workshops throughout Singapore to serve our 8000+ members/customers. Do let me know which area you are staying or working so that I can recommend you to the nearest workshop (in Autobay, Toh Guan, Ubi or Woodlands). 

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