2004 EB 5.4 Rough idle

[FUBAR2208]

It starts and runs fine but when I'm sitting still at a light, it will start to idle rough and do the shake and die. Starts back up fine.....It kind of feels like it's running out of gas? I have no clue.

It doesn't happen all the time but just started the other day and happens about 50% of the time.

If I put it in neutral at the stoplight and rev the engine, it stays going and doesn't die.

Anyway, if anyone has any clues, let me know.

Thanks,

J

 

[jdecker]

If it started with the cold weather it is likely a bad intake gasket

 

[FUBAR2208]

Nice, thanks!

Yes, it did start with the cold weather.

Is this something I can fix myself or do I need to take it somewhere?

 

[jdecker]

Doing it yourself I guess would be up to you, I'm not sure level of comfort working on your vehicles. It doesn't really require any special tools beyond a torque wrench. If you do decide to do it I would replace the plugs and consider changing the hard to reach coils at the same time as they are much easier to get to with the manifold off.

 

[FUBAR2208]

Is there anything else i should replace while I am in there?

Thermostat or anything?

And when you say coils, what do you mean?

 

[Bedrck47]

And when you say coils, what do you mean?

If you need to ask that question then maybe you should consider taking it to a shop.

He suggested replacing the plugs. In order to replace plugs You must remove the coils.
The coils are over the plugs (ignition Coils) or as also referred to "COP's"

 

[FUBAR2208]

I just need the answer, thanks

 

[FUBAR2208]

So i'm looking at ignition coils.....i see a variety of different prices....motorcraft set for 240 or 55 bucks a piece....then i see a whole set for 70 bucks.

Does this really matter?

I have already purchased motorcraft plugs, but I'm not sure on the coils

 

[jdecker]

Ignition coils vary in quality just like they vary in price. Obviously the best choice is going to be Motorcraft, but I have had pretty good luck with both Delphi and Denso as well. I would definitely pass on the cheap coils or you will be doing the job again.
Also, if you haven't already, I would suggest getting a subscription to Alldata or at least a Chiltons repair manual and look over the job before deciding to do the work yourself.

 

[FUBAR2208]

Makes sense, any luck with ACDelco?

Their set runs around $115.

And thanks for the advice, I will definitely do that. Could use it for future jobs as well!

I've watched a few videos of the job a handful of times and I'm fairly confident that I can do this.... I work on lots of other stuff, just not cars.

 

[Bedrck47]

You can also get a Ford Factory Service Manual on DVD on e-bay cost $15.00

Much better than the generic Chilton, Haynes or Clymer manuals

 

[atrident]

I get Chiltons through my library.Its free and online.

 

[blue oval guy]

I wouldn't dream of putting Chevy (GM) coils on my Ford, AC Delco really?
When in doubt always go with OEM Motorcraft stuff, price premium is not really that much.

Regards

 

[Bedrck47]

I get Chiltons through my library.Its free and online.

You get what you pay for If you like using a generic manual then go for it

The Ford Factory is specific to your year also has wiring diagrams showing connector pin layouts and locations plus much more

 

[Fuzzy]

Before you go through all this look for vacuum leaks