Search will be your friend here....these cars have to go through a number of specific drive cycles for all the systems to reset to ready. Somewhere, there's a thread that will describe what the drive cycles are. It requires more than just driving it for a number of miles. If you reset everything, then you'll have to start the drive cycle thing over.
Look at the picture in post #1 in the following thread...the may work if everything else is OK. Did you ever figure out what was causing P1341. This usually means the variocam is suspect or its solenoid is going bad. This will affect the timing advance...not sure of its impact on smog.
BTW: Car need to be a full operating temp for accurate deviation readings...+/- 6 are within spec. When numbers get outside of this range, something is wearing and needs replacement. IIRC, CEL pops on at around 9.
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'87 951
'01S 986 (Sold after 16 years ownership)
'78 924 (carburated; sold when moving to CA)
Last edited by thom4782; 01-04-2019 at 06:47 PM.
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