[sambo]

Basic checks I would be doing Slowy and this will take you less than 1 hour and cost you nothing.

- Is the computer powered up? Eg, connect OBDII port.
- Do you have spark? Borrow my spark plug tester.
- Injector pulse? Check with noid light.
- Check error codes - eg, MAF or other critical fault.

If all of those things are good, my guess is a timing or compression problem (custom heads?). Then again I'm no expert.