1994 Toyota 4Runner Q&A
1994 Toyota 4Runner Question: failed smog
There is an adjustment for the ignition timing, and if this not within the specification noted by the manufacturer, you will fail the smog check. On the 3.0L V6 (3VZ-FE engine) the specification is 10 degrees BTDC. If you look on the printout, it should note the actual reading they measured. You are best taking this to a shop that is a licensed smog test and repair shop. - Bret Bodas
...no knocking, no pinging, no hesitation...no reason to think there is a problem other than the failed smog test! Many thanks for your help! J
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