Hey guys, new to the forum, recently purchased an 07 tC for my wife.

Today I changed out the spark plugs and found that the old ones (possibly still original) had a good bit of white residue on them. This implys an issue of running lean, correct? What should I look into...? Not very familiar with these 4 cylinders...

Top to bottom is cylinder 1,2,3, and 4.

Thanks!

 

Looks normal; just corrosion from years of use. How many miles?

 

I appreciate the response man! Right now sitting at about 85k. Cleaned maf, sea foam in intake, oil change, changed trans fluid... Anything else I should do?

 

Make sure the air filter is still good. Just keep up with what the maintenance guide says. Keep an eye out for other wear items like struts and brakes. Also, new brake and power steering fluid wouldn't hurt.

 

Great, I will change those fluids this evening as well. Thanks again!

 

Yeah the power steering fluid isn't cooled efficiently in these vehicles at all. And although I didn't notice any difference between the 100K old, black fluid and the new pink stuff, you should still change it. Mines only a few thousand miles old and is already turning black.

BTW how did that Seafoam treatment work for you?

 

Thanks for your input!

Really I cannot speak for the Seafoam itself, since I did all the plugs, Seafoam, and maf sensor cleaner at the same time... Seems to run a bit more smoothly at idle, and through my driving RPM range (I usually shift before 3000). I will not BS you with any horsepower gains or anything :-p

I already had the Seafoam, so for the price of 11 minutes, I would say it was worth it!

 

FYI the stock plugs are good for 100K miles because they are Iridium.

 

Agree to disagree. That is what they say, sort of like how our transmission fluid is good for a lifetime. You go ahead and change yours every 100k.

 

I've personally had several vehicles with Iridiums last 100K or more, and when I was working at the dealerships I had a lot of similar situations. Changing early is more of a peace of mind deal, because Iridium doesn't wear like copper.

Anyways, just wanted to point out the service interval for anyone who reads this and doesn't know.

 

Toyota says 120k. So give me a couple months and we'll see how the held up.