2003 Cadillac DeVille Q&A
2003 Cadillac DeVille Question: MISFIRE #6
you need to determine why it is missfiring. it could be a bad plug, a bad coil, bad injector, vacuum leak or low compression. this is why you need a real diag to determine the failure and move forward from there. Roy - mastertech6371
If the compression is ok, in that cylinder and there are no injector codes or ignition system codes, I usually look at the ignition parts, if the wires and plugs look old, I start by doing a basic tune up which is to replace the plugs and wires with AC Delco parts. Cheap parts will just cause you more grief! Then I re-inspect how well the engine runs. - dandd
I have a 2003 Deville and got exact same code. I replaced the ignition coil bank (front coil pack). Under each are 4 short spark plaug wires. under which are the spark plugs. It may be a good time to replace them If It Is time. The rear bank is a bear to replace. The front bank where cylinder number 6 is located is easy. I used every method od diagnosing with OBDll diagnosis tools. I finally just took a leap of faith and I was right. - bilysinger
where is cylinder 6 front or back? i replaced all spark plugs and rear coil still running sluggish reading say cylinder 6 still misfiring
Can some please help me solve this problem? My plugs are running lean; white tipped as if its not getting enough fuel I replace my back Coil pack where my cylinders are misfiring I've switched my i...
I had the head gasket replaced, the code for open circuit for bank 1 o2 sensor and bank 2 o2 sensor popped up. Misfire on 6. Reset all the codes, drove around the block, and check engine light star...
this is a 1997 cadillac deville with the 4.6 liter northstar V8. it has 170,000 miles on it - mostly highway miles. has been misfiring recently & has rough idle. we just replaced O2 sensor & a d...