How do these spark plugs look to you ?

[Hershey]

Had them changed out at Toyota service center while in for suspension work . Replaced with DENSO SK16R11 plugs at $8.99 each . Car was idling rough , so had them replaced , seems no better . The tech lost one of the nuts for the engine cover and will likely have to order one at $2.35 . Here are pictures of used plugs at NGK , http://www.ngksparkplugs.com/tech_support/spark_plugs/faqs/faqread.asp . Which one looks close to these ? Don't look that healthy to us .

[fnkngrv]

I needed to replace the nuts myself a few times. I just purchased them at local hardware with the correct thread and have done fine. NO worrying about ordering any. Just a thought.

[fnkngrv]

Check Spark Plug Condition (http://www.fatheadsmotorcycles.com/wp-content/uploads/2012/08/check_spark_plug_condition.jpg)

Looks like you could have a mixture of a couple conditions there.

[CTScott]

Those plugs don't look bad for 73K miles.

[Shroomster]

I like how ash fouled and worn are the same image....

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[Hershey]

Check Spark Plug Condition (http://www.fatheadsmotorcycles.com/wp-content/uploads/2012/08/check_spark_plug_condition.jpg)

Looks like you could have a mixture of a couple conditions there.

What two conditions are you referring too? Is that with the NGK pics ? I was thinking that the PCV may be not working properly. Maybe I will clean it out or get a new one. Thanks

[Hershey]

I needed to replace the nuts myself a few times. I just purchased them at local hardware with the correct thread and have done fine. NO worrying about ordering any. Just a thought. Thanks , but I expect to get it back the way it went in with all the parts . It's less than $2.50 . They're going to try to locate it , if not , hopefully a new one through parts .

[esse10]

looks like a candidate for a Seafoam cleaning at the Intake manifold. Did wonders for my 200k mile new beetle.

[Exiwolfman]

Seafoam ...does really work ? I did my plugs at aground 140km and they looked clean nothing like urs ....also did u clean ur throttle body mine was dirty would stick and caused bad ideal , easy to do just make sure u have key on and someone on the throttle pedal when cleaning or ur get we'll May engine light .


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[jack black]

Little wear but lots of carbon. Any oil consumption? Is this short trip driving? If so, this car needs some hwy driving or Italian tuneup.

[fnkngrv]

Like Scott said with over 70k the results are not bad per se. Personally I would verify after 15-20k more miles how new ones look just for due diligence sake.

From my m-o-b-i-l-e

[Hershey]

Little wear but lots of carbon. Any oil consumption? Is this short trip driving? If so, this car needs some hwy driving or Italian tuneup. No oil consumption . Usually 50 or more miles per drive on urban roads , interstate and some city . Did use some Chevron Techron for the tank before removal of the NGK and install of the new Denso , probably around 300 miles of driving of Techron on the NGK .

[Hershey]

More pics of NGK the plugs .

[bronsin]

They are OK. Just gap them and put them back in for another 200,000k miles.

[jack black]

More pics of NGK the plugs .

Are these the same plugs as the OP? They look much better in this picture indeed.

[Hershey]

Yes , these are the NGK IFR5A11 installed at the factory .

[Hershey]

Got the nut in the mail and put it on . The car is still idling a bit rough . Oh well :frown: .

[jack black]

Have you cleaned the TB and checked the engine mounts?

[Hershey]

The tech that test drove the car with me in it tested for the mounts and said it is fine . Is he right , I :iono: . Things are not turning out to well with work performed :thumbdown: .

[Flammable]

Yes , these are the NGK IFR5A11 installed at the factory .
I have heard these iridium plugs can last 200k miles. :-)

[Jcp123]

I pulled a set of Iridiums out of my Echo, at 192k they were shot. I'd say 150-175k at best.

[dj92]

IIRC, that big gap is normal for plugs with iridium tips.
I have had a look at mine (68k km), and they almost looked the same, just a bit less of coal on them.
However, I suspect american cars to run a bit richer than european ones.
Might be due to different emission standards, I'll have to do some research in order to get clarity.
Btw, how is your long term fuel trim?