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2008 standard 156000 miles
Reading 90-92 on all 4. Slight white smoke upon ignition.

random misfires.
Seems strange that all 4 would be the same. Damn things running like a dream. Any thoughts?


excited to be apart of this community. Purchased my Tacoma in 2010 with 12,000 miles on it. It was a United meter service vehicle before I got ahold of it
 

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Mambeau / Admin
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Welcome to CT!

I hate to tell you, but ... The symptoms sound like a bad / leaking head gasket to me.
 

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2008 standard 156000 miles
Reading 90-92 on all 4. Slight white smoke upon ignition.

random misfires.
Seems strange that all 4 would be the same. Damn things running like a dream. Any thoughts?


excited to be apart of this community. Purchased my Tacoma in 2010 with 12,000 miles on it. It was a United meter service vehicle before I got ahold of it
You'll need to do a chemical block test. This single test, done properly, will speed up diagnosis by a factor of 10. It should be the first thing done whenever a Toyota has smoke, runs rough, coolant going low, etc etc. Pass or fail, you've just learned a ton about something you can't see. A headgasket issue will go from blue to yellow pretty quickly. If after a few minutes the best you get is a greenish/blue I would didn't consider that a fail.
Then, regardless of what the chemical block test shows, do a leak down test on all four cylinders. MUCH more informative than a compression test(though still good to do). Most chain parts stores have them in their tool loan program. You'll need a compressor, but even a small portable one should be fine for this. Make sure to record all your readings.

A compression test is good for identifying a problem, narrowing down the cylinders that are a concern. The leak down test can tell you if that cylinder has a intake issue, exhaust, or weak rings. Great thing to know once you start a teardown.
 
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