I need help,

I have no idea, I have changed the plugs 4 weeks ago, I just got a new MAF and I use the OEM Airbox and OEM filter.

When the car is cool, idle is poor and sometimes the Check Engine flashes and goes a way. Some times just does not flash and get on.

P0300
Porsche fault code 507 - Misfire detection
(total)

P0306
Porsche fault code 509 - Misfire cylinder 6


this are my codes, and when the car is warm starts and idle excellent.

At all rpms and gears the car runs awesome, the problem is just at idle when cool.

I hope I can get some imput from you guys....

Thanks!

 

Rough idle when cold after sitting and then becoming good after a few minutes and running fine once warm is the sign of a cracked coil.

 

Like John said, it sounds like a bad coil(s), is it the same code now as befor you changed the plugs?

 

Yes the same code, if is a cracked coil, should be #6?

should I change all of then?

Part#?

Thanks!

 

I would change them all, but you should first make sure they are the problem. If you want a quick way to see if they are in fact bad is clear the codes and move one of the suspected bad coils in to a known good one and see if you get new codes that reflect the new placement of the bad coil

 

Thanks!

I may start changing #6, which one is this?

 

A good preventative measure is to replace all of your coil packs (6).
I did it when my motor was out but obviously can be done with motor in.

MK

 

Firing order: 1-6-2-4-3-5

 

sorry kilrgt, driver side?-passenger side? front? rear?

 

agreed.. either coil pack, injector or plug a good way to check if it the cp is to swap it with the one next to it start the car let it warm up and see if the code changes cylinders... this way you can try to nail down what it is... if its an injector or plug the code will remain on the same cylinder

tim

 

Thanks!

Thus, which one is cylinder 6?

How much for a coil pack?

I believe tha part # is 996 602 104 00

 

I believe the order from Driver front to rear is 123, from passenger rear to front is 456, I am taking this from memory, wait for this to be verified.

 

yup im 99% sure cylinder 6 is passenger side front(toward front of car)

 

Thanks!

I appreciated!

How much for a coil pack?

 

Yes, #6 is the passenger side, closest to the front of the car. Also make sure that the wiring connector is clipped on the pack all the way, and the wires are still intact in the connector itself. The coil is 996.602.104.00 and is about 65 bucks.