Spark Plugs for A6 ?
Thread Starter
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3rd Gear
Joined: Dec 2008
Posts: 1,941
From: IL
Spark Plugs for A6 ?
Before getting my Repair Manual I guess I can keep begging for answers.
Is the two-electrode Bosch (7402 I believe I've seen somewhere) the OEM spark plug?
Do you guys buy iridium, platinum, or normal ones (NGK/Champion, etc)?
Thanks much in advance.
Is the two-electrode Bosch (7402 I believe I've seen somewhere) the OEM spark plug?
Do you guys buy iridium, platinum, or normal ones (NGK/Champion, etc)?
Thanks much in advance.
Banned
Joined: Mar 2008
Posts: 376
that is what i was told... in my 99 a6 2.8Q i have the bosch with four electrodes and they are better. and last alot longer, they seem to be better on performance and fuel economy as well. but just a little bit ive noticed an improvment.
1st Gear
Joined: Aug 2007
Posts: 381
From: Philly, PA
http://www.ecstuning.com
look for NGK - Spark Plugs (#PFR6Q) - Set Of 6 Plugs $72.85
ES#576
You should not experience gains from one plug to another. Effieciency yes!
I should clarify, that if your current plugs are fouled or have a substantial amount of miles on them, then yes you would feel a gain in power and performance.
Source is from NGK's website
look for NGK - Spark Plugs (#PFR6Q) - Set Of 6 Plugs $72.85
ES#576
You should not experience gains from one plug to another. Effieciency yes!
I should clarify, that if your current plugs are fouled or have a substantial amount of miles on them, then yes you would feel a gain in power and performance.
A common misconception is that changing spark plugs will result in a large power increase. In most cases, removing even seriously worn out spark plugs will only result in very modest power gains, typically about 1-2% of total engine output. This could be even less for computer-controlled vehicles, primarily because most newer vehicles have more powerful ignition systems and the vehicle's computer can make adjustments so that vehicle operation seems smoother and more seamless.
Many people think that simply supplying more spark to the firing tip can and will combust more fuel. What they don't understand is that most newer cars' engines are so efficient that they are already burning all of the available fuel. Simply adding more spark voltage can't burn more fuel because there is no more fuel to burn.
When a stock or near-stock engine is given a fresh set of spark plugs, peak efficiency is restored. The power gains that come from this restored state of tune are usually minimal. Any company that tells you that their spark plug will provide significant gains in power in a stock or near-stock engine is making blanket statements that may not be supportable.
Many people think that simply supplying more spark to the firing tip can and will combust more fuel. What they don't understand is that most newer cars' engines are so efficient that they are already burning all of the available fuel. Simply adding more spark voltage can't burn more fuel because there is no more fuel to burn.
When a stock or near-stock engine is given a fresh set of spark plugs, peak efficiency is restored. The power gains that come from this restored state of tune are usually minimal. Any company that tells you that their spark plug will provide significant gains in power in a stock or near-stock engine is making blanket statements that may not be supportable.
Thread Starter
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3rd Gear
Joined: Dec 2008
Posts: 1,941
From: IL
Thanks for the opinions and link, guys.
Well, the most expensive ones at AutoZone are
- NGK Iridum (Ix) ---- $ 6.99/piece
- Bosch Iridium/Fusion.. $7.99/piece.
Is there anything special about the NGK plugs sold by ecstunning?
Well, the most expensive ones at AutoZone are
- NGK Iridum (Ix) ---- $ 6.99/piece
- Bosch Iridium/Fusion.. $7.99/piece.
Is there anything special about the NGK plugs sold by ecstunning?
Thread Starter
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3rd Gear
Joined: Dec 2008
Posts: 1,941
From: IL
Thanks, smtcapecod.
I was hoping someone would really confirm/infirm what's the OEM spark plug, but I guess the sparkplug.com might give me some clue...
As a matter of fact, I see there that the NGK PFR6Q ecstuning.com sells is a double platinum plug.
At least I got something out of it.
Thanks again.
As a matter of fact, I see there that the NGK PFR6Q ecstuning.com sells is a double platinum plug.
At least I got something out of it.
Thanks again.
1st Gear
Joined: Sep 2006
Posts: 7
Sorry to hijack the thread. I have the same car (2005 A6 3.2Q). My local dealer quoted me ~$400 to replace the entire set (6) of spark plugs. Is this something I can do myself, or it is really a jot for the professionals.
Thanks in advance.
Thanks in advance.
Thread Starter
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3rd Gear
Joined: Dec 2008
Posts: 1,941
From: IL
Shen,
replacing the spark plugs is something you can do on your own. If you have the spark plugs ready, it shouldn't take you more than 5 minutes
per plug to replace it. 30 minutes for the whole thing should be more than enough time, unless you're picky and start analyzing the old plugs, cleaning the eventual debris around the holes, etc.
Anyway, it is as easy as unpluging the wire, unscrewing the old plug, screwing back the new plug, reconnecting the wire.
I understand that the economy is bad and the dealers mostly make money nowadays through the service department, but you would have to shoot me and still I wouldn't pay $ 400 to a dealer to replace my spark plugs.
Moreover, changing the spark plugs on an Audi is one of the easiest things to do, since they all are exposed, easy to reach to unlike other cars.
replacing the spark plugs is something you can do on your own. If you have the spark plugs ready, it shouldn't take you more than 5 minutes
per plug to replace it. 30 minutes for the whole thing should be more than enough time, unless you're picky and start analyzing the old plugs, cleaning the eventual debris around the holes, etc.Anyway, it is as easy as unpluging the wire, unscrewing the old plug, screwing back the new plug, reconnecting the wire.
I understand that the economy is bad and the dealers mostly make money nowadays through the service department, but you would have to shoot me and still I wouldn't pay $ 400 to a dealer to replace my spark plugs.
Moreover, changing the spark plugs on an Audi is one of the easiest things to do, since they all are exposed, easy to reach to unlike other cars.
1st Gear
Joined: Sep 2006
Posts: 7
Thank you!
Shen,
replacing the spark plugs is something you can do on your own. If you have the spark plugs ready, it shouldn't take you more than 5 minutes per plug to replace it. 30 minutes for the whole thing should be more than enough time, unless you're picky and start analyzing the old plugs, cleaning the eventual debris around the holes, etc.
Anyway, it is as easy as unpluging the wire, unscrewing the old plug, screwing back the new plug, reconnecting the wire.
I understand that the economy is bad and the dealers mostly make money nowadays through the service department, but you would have to shoot me and still I wouldn't pay $ 400 to a dealer to replace my spark plugs.
Moreover, changing the spark plugs on an Audi is one of the easiest things to do, since they all are exposed, easy to reach to unlike other cars.
replacing the spark plugs is something you can do on your own. If you have the spark plugs ready, it shouldn't take you more than 5 minutes
per plug to replace it. 30 minutes for the whole thing should be more than enough time, unless you're picky and start analyzing the old plugs, cleaning the eventual debris around the holes, etc.Anyway, it is as easy as unpluging the wire, unscrewing the old plug, screwing back the new plug, reconnecting the wire.
I understand that the economy is bad and the dealers mostly make money nowadays through the service department, but you would have to shoot me and still I wouldn't pay $ 400 to a dealer to replace my spark plugs.
Moreover, changing the spark plugs on an Audi is one of the easiest things to do, since they all are exposed, easy to reach to unlike other cars.
