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04' LS V6 Not firing on 1 Cylinder

9 messages,  Last post on Jul 06, 2009 at 4:02 PM

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#2 of 9 Re: 04' LS V6 Not firing on 1 Cylinder [craziekeiichi] by akirby May 04, 2009 (11:03 am)
Replying to: craziekeiichi (May 04, 2009 10:32 am) Are you sure you put the wires back on the COPs correctly? My guess is you have other bad COPs - they usually go out in bunches. Replies to this message: craziekeiichi (May 04, 2009 11:09 am) akirby (May 04, 2009 11:56 am)
#3 of 9 Re: 04' LS V6 Not firing on 1 Cylinder [akirby] by craziekeiichi May 04, 2009 (11:09 am)
Replying to: akirby (May 04, 2009 11:03 am) The wires were put on tight, looks like everything is good. It's just the one cylinder that doesn't fire right. I pulled the COP's out of the other cylinders while the engine was running and noticed a huge drop in RPM. When I pull out the middle one, it keeps running the same. The pack was swapped out with a different one and had the same results.   According to the scanner, Coils C, E, and F "Primary/Secondary Circuit Malfunction"   It also said something about the TAC system being on, and that it was "Stuck" or something. Unfortunately I erased the codes before writing them down heh. Then restarted the car and scanned it again. Replies to this message: akirby (May 04, 2009 11:56 am)
#4 of 9 Re: 04' LS V6 Not firing on 1 Cylinder [craziekeiichi] by akirby May 04, 2009 (11:56 am)
Replying to: craziekeiichi (May 04, 2009 11:09 am) May need to get a Lincoln tech involved - doesn't sound like an easy fix.
#5 of 9 Compression Test by craziekeiichi May 07, 2009 (10:43 am)
Replaced all 6 spark plugs and the 3 'Bad' Coils, still runs the same with the same codes. A compression test showed 120 on the cylinder that doesn't fire, and 130-140 on the two next to it. My method of checking may not have been the best though. I just pulled the plug and screwed the hose on, then started the car lol. Let it go for a few seconds and turned it off and red the results.   Anyone have a clue?
#6 of 9 2004 Lincoln LS - v6 by sugamomma67 Jul 06, 2009 (9:15 am)
I am having a frustrating time with my car....ok, it intermittently goes into fail safe mode and I can only coast until I'm able to shut it totally off and it starts right back up. I was told it was coils 5 & 6, I replaced them by going to AZ and purchasing new plugs as well...this worked for a short while and started shutting off again. I noticed that when I press the accelerator slowly but continuously, the rpm needle does not go beyond 3...any ideas? Replies to this message: akirby (Jul 06, 2009 9:52 am) sugamomma67 (Jul 06, 2009 1:00 pm) akirby (Jul 06, 2009 4:02 pm)
#7 of 9 Re: 2004 Lincoln LS - v6 [sugamomma67] by akirby Jul 06, 2009 (9:52 am)
Replying to: sugamomma67 (Jul 06, 2009 9:15 am) Replace the other coils? Replies to this message: sugamomma67 (Jul 06, 2009 1:00 pm) akirby (Jul 06, 2009 4:02 pm)
#8 of 9 Re: 2004 Lincoln LS - v6 [akirby] by sugamomma67 Jul 06, 2009 (1:00 pm)
Replying to: akirby (Jul 06, 2009 9:52 am) thank you for your response....I have not as of yet b/c I couldn't find a repair manual for my car with instructions on how to remove the intake valve...I was recently laid off and cannot afford to have the dealership put them in....I am thinking of taking it back for another diagnostic test to see if it is still reading the same coils. Replies to this message: akirby (Jul 06, 2009 4:02 pm)
#9 of 9 Re: 2004 Lincoln LS - v6 [sugamomma67] by akirby Jul 06, 2009 (4:02 pm)
Replying to: sugamomma67 (Jul 06, 2009 1:00 pm) Autozone, pep boys, etc. will usually read the code for free.

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