Your check engine light is on. You WILL NOT pass until the reason for that light is repaired. Changing the ignition timing may also make the other readings much worse.
Unless you have a timing light and a way to read the exhaust emissions simultaneously, you'll likely make your problem much worse.
Here are the timing instructions anyway
SET IGNITION TIMING
The ignition timing marks are located on the engine front cover. A slot on the balancer indicates engine top dead center.
1. With engine RUNNING at operating temperature, choke fully open and air conditioning off, ground the diagnostic terminal of the ALDL terminal.
2. With the use of a timing light or meter, set timing at specified RPM, by loosening the distributor clamp bolt and rotating the distributor until specified timing is obtained.
3. Tighten the distributor clamp bolt and recheck timing to make sure the distributor was not moved during tightening.
4. With the engine still running, unground the diagnostic terminal.
5. Make carburetor adjustments as required.
Friday, March 4th, 2011 AT 11:54 PM