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Enthusiast Joined Feb 1, '14 From Phoenix Currently Offline Reputation: 0 (0%) ![]() |
Hi. Could use some advice. 94 ST Manual rebuilt engine
Previously had CEL with code 071. Replaced ERG valve, EGR modulator, and 1 vacuum hose. CEL fixed. Went to have car smogged and all emissions are high. Here are the numbers: 15 mph HC=95 CO=0.53 NO=795 25 mph HC=82 CO=0.41 NO=763 Not sure where to begin. Should I just replace both O2 sensors to start and then retest? Any advice appreciated. Thanks! Jay |
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Enthusiast ![]() ![]() ![]() ![]() ![]() Joined Dec 8, '03 From Lancaster CA Currently Offline Reputation: 6 (100%) ![]() |
your NO is really high, try using 91 gas next time. also look for vacuum leaks and exhaust leaks
-------------------- 2001 Celica GT-S Turbo
1997 Supra TT 6speed 1997 Celica 3MZ/1MZ swap 1990 Celica All-Trac |
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Lo-Fi Version | Time is now: July 24th, 2025 - 3:29 AM |