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ONCE AGAIN - No spark on 3 & 4 ?????


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Had this problem a few months back.....swapped ignitor, coil, checked wiring continuity in between coil, ignitor, and to the ECU.....all OK..

 

Installed new ECU and that seemed to be a cure....

 

Now the problem is back? Absolutely no spark on the 3-4 bank.

 

One suggestion was a bad spark plug or wire on 3 or 4. Still checking on that ...but not clear on the concept....how would this cause no spark at all on these two cyls.

 

Any other suggestions appreciated..... Not sure if I now have two dead ECU's....and something that blows them out ?????? or some other problem.

 

NEED HELP !

 

TIA.

 

Warren C.

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[...]Now the problem is back? Absolutely no spark on the 3-4 bank.

 

One suggestion was a bad spark plug or wire on 3 or 4. Still checking on that ...but not clear on the concept....how would this cause no spark at all on these two cyls.[...]

Perhaps the following links will help provide some insight concerning the relationship between spark for two cylinders and the coil pack, as well as some troubleshooting info.

 

http://endwrench.com/images/pdfs/IgnitionCoil.pdf

http://endwrench.com/images/pdfs/DirectIgnition.pdf

http://endwrench.com/images/pdfs/IgnitionCoilSum04.pdf

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