I've been having a problem with a misfire. Been getting 300, 301 and now 303 codes. I've had a Toyota authorized mechanic tell me that it appears to be a bum valve. Compression test showed Cyl#1 120 (iirc) with the others 170-180. (#1 went up to 135 or so with oil added.) The problem is deteriorating and now the engine is stumbling noticeably. I've done the seafoam trick a couple times, and the problem continues.
Vehicle is 01 with about 130k, I'm the 2nd owner.
So, it seems my choices are:
a) valve job and hope for the best ($2k est from above mechanic, 10 hrs work).
b) replace the head ($500 ebay + labor).
c) whole new engine (Recycler $1200 rebuilt & installed, price yet to be verified).
Also note that I have a warrenty (amerigard) on power train, but I will likely only be re-imbursed at best and the work will likely have to be done by dealer.
I can also likely get a valve job done for much less (the garage around the corner deal). And I might even be able to replace the head myself if I could get a friend or two to lend me a hand (which I get do with some pizza/beer), but I've never ventured beyond replacing a clutch in the past.
I'd like input on my problem and maybe a choice I've missed.
Frankly I'm leaning to swap out head.
PS, I'll likely get another opinion Monday and take it to another Toyota dealer.