Just flashed my new-to-me '01 at 26k miles (owned it two weeks). Pretty sure the previous owner had yet to change the spark plugs. Its bucking me and threw a CEL (flashed, then stayed on the second time) at high RPM/boost under heavy acceleration. Hoping the signs point to spark plugs and/or coil packs.

Any reason I should be concerned?

Codes:

P0300 - misfire detection (total)
P0306 - misfire cylinder 6
P0305 - misfire cylinder 5
P0301 - misfire cylinder 1
P0302 - misfire cylinder 2

Thanks (and sorry about another freakin' misfire thread)

 

Def do plugs and coil packs if you haven't. Coil packs are newer 997 part number.

 

Oh and no reason to be concerned. More boost will show bad plugs much sooner... Do some searches about good plugs. The Bosch FR6-LDC would probably be a good fit unless you plan on doing some serious mods.

 

and make sure you do both coils and plugs... and get better plugs....

 

These cars need new coils at 26k? How long do coils last for?

 

what were the other codes you got?

 

imagine doing the pugs.. getting n the car and finding out you still have some misfires... did you ever change the plugs? do you know how much labor is involved?

 

They don't but the old 996 part is known for cracking and having issues. Cheap parts for the labor to get to them and when you do plugs, you have them out anyway...

After that, they should be good for a long time! Keep in mind this is a 10 year old car too! Plastic knows no mileage, but years add up!

 

If you are doing it yourself and don't mind hanging in the garage for 2,3 hours to redo it, skip the coilpacks. 26k and 10 years is not a crazy heat/life exposure. I went 40k with my 2004 and zero issues. YMMV

If you are PAYING someone else, I'd just do it. Cost is only the part price, labor is $0 for installing new coils with a plug change. The labor price for whole job is ~3x the cost of the coils

A

 

Ya I had no idea it was such a chore for the plugs... My bad.

 

Had same issue at 27kmi

I got CEL for misfires.

Just did 30k service early w/ new plugs and coil packs.

All those symptoms are gone and car pulls smooth and no jitters at idle.

can't be happier at the moment.


hope you get it sorted out.

 

POMFG - unexpected dent detected. Thanks Ben.

 

NGK BKR7E is a popular plug as well. Worked for me.

The job is not too bad.
Remove rear bumper.
Remove rear parts of wheel well lining.
Remove intercoolers.
Use a couple of long extensions to a 1/4 ratchet, to remove and replace coilpacks and plugs.

Or just have a shop do it.

My coilpacks were all fine at 70k miles. I swapped them anyway while I was in there.

 

Do plugs and 997tt coils.

 

$1,070 to do just what you suggested. 5hrs labor. Except he said I should use (and installed) the NGK BKR6E (at $15 a pop, no less - nice markup!!). Told me the NGK BKR7E aren't beneficial until you get up into 20psi+ boost area.

Keeping my indy in business is what I do best. At this rate, I may just buy a second TT to practice working on. It may end up being cheaper in the long run.