Just to update, my EGR is sticking intermittently on warmup, so I have a little rough running for a few seconds. I'll take it off and run some good cleaner through it with a nice rough steel pipe cleaner. After that I shouldn't have any work left on the truck - apart from the front drive shaft and brake calipers I replaced this weekend... oh, and the faulty back door switch. I'm starting to 2nd guess why I sold my '88 22RE to get this 4Runner.

My engine check light comes on intermittently because of the sticking EGR (I believe). I get 25 for the error code which is short for Lean Malfunction.

Have you found the error code for the engine check light?