Seized Spark Plug

[162435]

I picked up a one-owner '02 for my daughter in June 2020 with 199,000 on the clock. Always dealer serviced.

When I test drove it, the truck could barely reach highway speeds and bucked at different throttle positions. The deal was way too good to pass up, so I took a chance that it was something easy and not the tranny.

This is what I found when I pulled the plugs:



I installed new NGK plugs and three new plug wires from Toyota. Ran perfect.....



Andreas

 

[brillo_76]

The valve train on that side was also noticably more varnished.

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Maybe someone changed a head in the past. Hard to say when thru are used.

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[brillo_76]

I picked up a one-owner '02 for my daughter in June 2020 with 199,000 on the clock. Always dealer serviced.

When I test drove it, the truck could barely reach highway speeds and bucked at different throttle positions. The deal was way too good to pass up, so I took a chance that it was something easy and not the tranny.

This is what I found when I pulled the plugs:



I installed new NGK plugs and three new plug wires from Toyota. Ran perfect.....



Andreas

That's nothing I had one that had original spark plugs in at 215k. The spark plug electrode broke off and is stuck In the piston surface. The engine would misfire as the ignition would cause the porclin to chatter as nothing was holding still anymore and half the center of the plug would move every fire on that cylinder.

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[texadelphia]

I picked up a one-owner '02 for my daughter in June 2020 with 199,000 on the clock. Always dealer serviced.

When I test drove it, the truck could barely reach highway speeds and bucked at different throttle positions. The deal was way too good to pass up, so I took a chance that it was something easy and not the tranny.

This is what I found when I pulled the plugs:



I installed new NGK plugs and three new plug wires from Toyota. Ran perfect.....



Andreas

Mine looked marginally better than that and the dielectric grease on the electrodes had turned into the mosquito resin from Jurassic Park.

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