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Found 1 result

  1. rickyhils
    1991 Loyale Wagon SPFI FWD had new cats put on 6 years ago after CA smog fail. New cats then passed CA smog with flying colors. HC (ppm) meas was 6 (six) @15mph and 3 (three) @25 mph. CO% meas was 0.01 @15mph and 0.00 !!!. @25mph. NO (ppm) meas was 58 @15mph and 32 @25mph. I could not have been happier. Engine had 340k miles on it. After the engine overheated to death, I swapped in an EA82 long block (a pro rebuild that is now going on 6k happy miles - I got lucky on a Craigs List find. All good work, from cams to main bearings to new oil pump. Probably rebuilt around 2009 when machining and parts were still available). Jump ahead to 2021 and 2023 when the CA smog tests measured crazy high. HC (ppm) meas was 118 @15mph and NO (ppm) meas was 788!!! @15mph. BUT NO (ppm) meas was only 64 @25mph. I am not sure as to WHY. My DIY guesses range from my having messed up the EGR setup, ignition timing, to a low performing fuel pump (lean fuel mix) , to a slightly higher compression ratio after heads resurfaced (although there has never been any knocking sound). Any ideas? Thanks to all you guys for still being here.- Ricky
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