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I heard that the EGR valve may be a problem with this truck. I checked it, and, surprisingly, it was fine. It is pretty hard to get to on the 22R-E; kind of a pain to get a socket in there. I also checked the valves, but they were fine. I took it to a local Toyota specialist shop and had them take a look at it. I had a bad thermostat, causing a high idle. Oddly, I thought it just ran really cool. The temp gauge has never been as high as since the thermostat was replaced. But the idle is a little slower now. The shop did a block check, and my truck failed, but not badly. I have a slight leak in the head gasket. That is probably the cause of my rough idle. For now, I'm going to live with it, watch the temp gauge, and check my coolant level every week. When I start to see signs of the head gasket getting worse (steam out of the tailpipe at startup, using coolant, etc.), I'll get the head gasket replaced. Once it is done, it will be a relief; included in the job is new intake manifold gasket, exhaust manifold gasket, valve job, timing chain, tensioner, timing chain guides, etc.. It will be reassuring to have all that replaced.
Good luck with your girlfriend's truck!
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