adobian

My engine stutters a little bit. I took it to a local mechanic who scan it and we saw that Cylinder 5 misfired. He quoted me something like $500 for 6 plugs and one coil plus labor, dealer's part. I figure I should do it myself.

So it looks like I need to remove the coolant bottle from the frame, then remove the coil from cylinder 5, and remove the spark plug.

I need to buy a coil and a spark plug, correct ? Can I buy it from say Autozone or Oreilly (Kragen) ?

tenspeed

Swap the plug from five to another cylinder. If five is still misfiring, it could be the coil or injector - swap coils to find out.

adobian

Thank you tenspeed.

Another question:

http://www.carparts.com/details/Audi...FUNhfgodEa4Ayg

This seems inexpensive compared to others. Is this reccommended ?

Mine is a 2001 2.7T

adobian

http://autorepair.about.com/library/...bl-fo-2053.htm

Is cylinder 5 closest to the firewall on the right looking from the front ?

adobian

http://www.oreillyauto.com/site/c/se...tro&vi=1375769

I see plugs with .032 gap and .028 gap here. Which gap is correct ?

adobian

Found this interesting article:

http://www.audizine.com/forum/showth...eat-Range-Info

tenspeed

I don't know if that coil is a good deal or not. I guess it depends on how long it works.

Rockauto.com has five listed from $35 to $50. Look under 2001 AUDI ALLROAD 2.7L V6 Turbocharged : Ignition : Ignition Coil

You can also check eBay to see what prices are being asked.

I was thinking about your misfire and you can try swapping the coils first to see if the misfire moves. It might be easier than swapping plugs.

adobian

I am planning to sell the car. But I want to replace the plugs for the new owner whoever he is. I want to replace all 6 plugs but the two outer ones closest to the front looks most difficult. For those who have done this, what did you have to remove to get access to them ?

5v/cyl

The NGK Laser's. The other plugs have no business being in this engine.

P4Ring

I understand that you want to change all 6 spark plugs for the new owner but that is the wrong way to go about tracking down a miss fire. You can change all 6 plugs and still have miss fire. Tracking down miss fire the right way will save you money in the end.

Start by insuring that the electrical contact in the harness is secured and clean. Next swap the coil from the suspect cylinder to another that was running good. If miss fire follow to the previously good working cylinder, coil is defective. If no change, move the plug as well. If the known-to-be-working-good clyinder run without miss fire, change the #5 injector.

UPDATE:
On 2001-2002 the power output stage control module is external to the system and can also cause missfire. However, when they fail, they usually cause a cylinder or two to not fire indefinitely.