Ignition Coil Problem Again

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goldiegill
Posts: 46
Joined: Sat Aug 26, 2006 6:35 am

Ignition Coil Problem Again

Post by goldiegill »

hi
I recently purchased a new ignition coil (Coil No. 1) for my Nexia 1.5 DOHC. This coil was country made (Made in Taiwan) as I cannot get a new Original one in India. This coil worked well for 10 minutes and then the car stopped and never started again. :cry: Then I was able to find an original but used ignition coil (Coil No 2) but when I put it on my car, it only works when it likes to work. :? It works very fine for any length of time it wishes, then it stops. The again after some time, it starts working very fine. I can't figure out why. The current coming to coil from 4 wires from ECM continues to flow in the +ve and -ve (Red and Black) wires as I have checked them, but am not sure about the other two wires. How can I check them? Then whenever I put my old coil (Coil No 3), which gives current only to Plug no. 2 and 3, it works as usual giving current to the two plugs, which means the input current to the coil from ECM is coming normally (I have tried swapping plug wires also). Then again I purchased another new country made coil (Coil No 4) which worked for two days very well and today it also stopped working. :cry: The spark plugs are brand new (Champion; NGK were unavailable). Where can I get a new original ignition coil in India? PLease help. Where else can be the problem???? :?:
Goldie
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Daniel
Expert
Posts: 1298
Joined: Mon May 03, 2004 8:28 am
Location: Belgium

Post by Daniel »

Hi,

The only way I see to check the two remaining signals from ECU to COIL is by oscilloscope. And if you can get/borrow a dual channel o'scope you could see both signals togheter. Signals are short 12volt voltage bursts, in the range of millisecond. DON'T TRY to look at spark plug voltage with this o'scope!

For the failure of your different coils a posibility is that you use incorrect spark plugs. They must be resistive as already said. You can check this with a ohm-meter connected between the top of central electrode (where the plug cap is connected) and the bottom of this electrode (not the stuff that is part of the nut/screw/ground). You sould measure 3500ohms for a NGK BKR6E-11. Or give us the exact type marked on the sprark plugs you use.

BTW the wires from coil to plugs must also be of the resistive type. Check them too. I don't remember the value right now.

Hope this help.

Daniel
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