2003 Toyota Tacoma Q&A
2003 Toyota Tacoma Question: Would an incorrect install of timing belt misfire happen right away or not?
Most likely ignition misfire and not belt related. - pushrod
You might try this. If engine runs rough all the time, while it is idling, disconnect one spark plug at a time. If engine runs the same with that plug disconnected, and does not get worse, you probably have a bad plug, bad wire, bad individual coil, or bad injector. - Dr Quick