Need Help with MPG/MisFires

[pkerrigan21]

Hey guys,

I am new to this forum, but certainly not new to the lincoln world. I own a 2004 lincoln ls v6 with 103k miles. This year and this engine size is not known for having bad COP's filled with oil/water...

I have had a few misfires in the past. The codes have read and shown that it is either cyclinder 1,3,4, or 5. Different misfires have shown different cylinders but it has always been one of those 4.

I decided to look into it, and found no oil or rust on the ride hand side of the engine If I am looking at it from the front bumper (so the driver side bank). I have yet to do the other side because it is so difficult to get to. I guess I don't know how to tell if the coils are bad because they look like they are visually in perfect shape

Another issue was that when I turned my heat on I could smell a burning oil smell, but not when I turned on my AC. I check my oil dipstick (it has been about 2200 miles since my last oil change) and found that my oil was low. It was above the min line, but certainly only about 1/5 above it between the max fill line. - So not sure where the oil might be leaking that is causing the burning smell.

So the other day a new code came up and said catalyst efficiency is inadequate... I check my MPG and it was only about 13mpg in the city.

I recently reset my transmission by disconnecting the battery (this was about 4 days after the last catalyst code). It runs a lot smoother in terms of changing from 1st to 2nd etc.

Do I just need to have my PCM reflashed to make sure everything is being done correctly, or what would you suggest my next steps should be?

Thanks again for the help. I hope I put in enough information for everyone to know whats going on.

 

[joegr]

Hey guys,

I am new to this forum, but certainly not new to the lincoln world. I own a 2004 lincoln ls v6 with 103k miles. This year and this engine size is not known for having bad COP's filled with oil/water...

That's very much incorrect.
I've fixed one or two 2nd gen V6s with your symptoms by replacing all the COPs and plugs. They do fail on the V6s.

The catalytic converter problem is probably related to running for too long on bad, misfiring coils.

A PCM reflash won't fix marginal coils.

The oil leak may be from the intake manifold. I've heard of a few cases. Of course, it could be from the valve covers or a few other places.

AC on max cooling selects recycled (cabin) air (but it should switch to fresh air after cooling off). Heat selects fresh air and can bring in smells from under the hood if you are leaking oil somewhere.

 

[pkerrigan21]

I am going to take the upper manifold off and make sure it is not cracked.

From there I am going to replace the Ignition Coils with these: Igntion Coils from Alanisdeal06 on ebay

The spark plug with one of these - Does it matter which one I use?: Spark Plugs from Autozone

The valve gasket cover with this: Valve Gasket Cover

I saw on the ford website that you can buy spark plug tube seal - you can see it here: Spark Plug Tube Seal - Do I need this????

Should I also just go ahead and replace the PCV elbow with this: pcv valve from autozone

I know you guys know your stuff, so if you could please give me your input that would be great. Will I need anything else, or should i do anything else while im in there since I will have the whole upper manifold off?

Thanks everyone!