Re: 2004 TXT hard start
I agree trig. 180 does sound high especially if the other is 165. Maybe a lot of carbon buildup in the exhaust port behind the valve?
Assuming all the valves are .004 the intake valves do show that they needed more adjustment than the exhaust valves to get there. Not that they’re big red flag wow excessive, but definitely different.
At this point, you’ve pretty much checked everything external that you can. If it’s been run as hard as you say with a ton of hours on it, may be time to take it apart and see what’s cookin inside of it.
Be worth checking the timing belt marks and make sure it isn’t stretched or skipped a tooth. But I suspect whatever is going on is wear internally… either worn valves, or heavy carbon buildup
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