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Discussion Starter #1
This is my first ever post, so let me know if this should be posted somewhere else, or if the answer has already been discussed elsewhere.

My specs:
2000 Toyota Celica GT-S stock

Purchased about 6 months ago with the check engine light on (stupid idea) for $3000. Code read PO300-random misfire. Most recently, a mechanic read the following codes: P0300, P0306, P1300, P1305, P1310, P1305

Went through all cheap fixes: switched ignition coils, switched spark plugs, cleaned O2 sensor, used a bottle of fuel injector cleaner. No luck.

For a $250 'inspection' the Berkeley Toyota dealership performed a leak-down test = 90% leak on cylinder #4. Then offered to charge $3000 to take it apart to find the problem. No thanks!

Did a compression test and found all cylinders at 220psi, except #4 at 120psi.

Going back soon to rent the compression tester to do a wet compression test on that cylinder to see if its a bad ring or valves. This is a daily driver, and I don't have much money to fix it. My mechanical skills are limited, but I wouldn't mind trying to replace the heads if it's close to 'idiot proof'.

Questions:
1. Should I replace the heads with a new/remanufactered heads (maybe $500 on O'Reilly's):
http://www.oreillyauto.com/site/c/detail/PTQ0/2852A/02257.oap?year=2000&make=Toyota&model=Celica&vi=1433053&ck=Search_02257_1433053_-1&pt=02257&ppt=C0332
2. Do I have a valve adjustment done by a local mechanic for $1500?
3. Replace the whole block ~$2000 +$1000 labor?
4. Any idea how much my car is worth now with the body in good condition?
 

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Discussion Starter #3
No smoke that I can see any where. Sometimes I smell gas through my vents. I've also developed an audible water bubbling sound in the vents, but a friend says that I just need to burp the coolant system.
 
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