95 LT-1 passes smog exhaust stinks!
06-13-2007, 02:25 PM
#1
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Location: Las Vegas Nevada
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95 LT-1 passes smog exhaust stinks!
Hello fellow C4 owners, my 95 Corvette has a rotten egg/sulphur/sour exhaust smell (definitely from the exhaust) has new O2 sensors, new cats and here are the results of the smog test (it passed) Any ideas as to why the excessive smell? Any readings look off or wrong to anybody out there? The dealership cannot find anything wrong with it and threw a bunch of parts at it and blew a lot fo my $$$. THX!!
LEFT BANK (DRIVER’S SIDE EXHAUST)
RPM IDLE: HC (PPM) 74 CO% 0.03 CO2% 13.90 O2% 1.27
RPM 2500: HC (PPM) 16 CO% 0.01 CO2% 14.10 O2% 1.05
RIGHT BANK (PASSENGER SIDE)
RPM IDLE: HC (PPM) 42 CO% 0.00 CO2% 10.00 O2% 6.62
RPM 2500: HC (PPM) 10 CO% 0.01 CO2% 14.00 O2% 1.01
LEFT BANK (DRIVER’S SIDE EXHAUST)
RPM IDLE: HC (PPM) 74 CO% 0.03 CO2% 13.90 O2% 1.27
RPM 2500: HC (PPM) 16 CO% 0.01 CO2% 14.10 O2% 1.05
RIGHT BANK (PASSENGER SIDE)
RPM IDLE: HC (PPM) 42 CO% 0.00 CO2% 10.00 O2% 6.62
RPM 2500: HC (PPM) 10 CO% 0.01 CO2% 14.00 O2% 1.01
06-27-2007, 09:23 AM
#2
This is a C4 battle we all fight keeping both sides of the engine balanced. You might have an injector problem. It's probably time to check/test the injectors. An injector leaking slightly could throw the reading off at idle.
Last edited by Red Sleeper; 06-27-2007 at 09:26 AM.
