Tune up..

Well after almost twenty three years I’m getting a miss at low RPM’s. Plugs are over due so decided to do a tune up.
3 Toyota coils OEM
3 Toyota spark plug wires OEM
6 Denso plugs OEM
Up and downstream Denso O2’s OEM
All for about $430. I have my last emissions test in August. And this SUV has been so good to me....

 

I did notice ten years ago when I did plugs one wire coil connector broke and I had to zip tie it. It was getting brittle then...

 

I found my miss!!!
Don’t use Bosch plugs with the four electrodes. All of them broke off of this plug.....

 

I got 300,000 miles on the factory plug wires coils and fuel filter....
On my third set of plugs... Always use Denso!!!
Ready for emissions it runs like brand new.

 

Awesome! Glad you found it. @jross20 could possibly use some pointers from you for his issues.

https://www.4runners.com/threads/getting-maybe-5-mpg-haha-help.9929/

 

Is that the PCV valve in the upper right hand corner of the head? I got a OEM one coming with hose and grommet....

 

Yep...we used to just blow those things out with the air compressor. Jiffy Lube dude always brought that thing to me on the first car I ever owned and tried to get me to replace it every time..haha

 

Just replaced PVC valve, grommet, and hose. It’s never been done. Original is clean but the hose was starting to swell/split....