my 87t failed the evap test (visual was fine on evap, but it failed on the machine) and smog today. tech said the filler neck on the tank is a common problem when it comes to the evap, but could be many things. as for the smog it passed w/no problems in the higher speed (25 mph) test but failed in the low speed (15 mph). in the higher speed test my numbers were all w/in means...the hydrocarbons and NOx numbers were a little higher than average listed but were fine. CO % numbers were actually lower than average. its the lower speed numbers that are the issue along w/that damn evap test. i swear damn cali and their smog bs. :3d_frown:
had the b/f take it in b/c he works for benz and the test only station i used last yr gives vehicle manufacture/dealer employees a nice discount and it required a test only smog anyway. he took it during his lunch break...the car was at operating temp when he got there, but he didn't get more than maybe 5-10 mins of actually driving it before he got there (i know its usually better to drive it a little longer) also by the time they got it on the machine it was nearly an hour it had been sitting. how much do u think this might have made a difference in the numbers i got and having failed? though i know it having failed the evap could have something to w/why it failed the smog itself too.
i have a few ideas i was thinking of trying such as plugs (they aren't all the old, but i figured i would pull them out and take a look), plug wires, main cat (was running a test pipe for awhile so the main barely got any use), o2, fuel filter, injector cleaner (i figure its about time for the last 2 anyway), etc. car just had an LOF this past saturday. running 10w 30 mobil 1 synthetic. am i missing anything...any suggestions? my 87t is a federal/canada catalyst so it came stock w/only one cat being the main cat. a stock dp w/the other cat was put on before the prior smog test...this was before it was known the car was a federal and canada catalyst. previous owner had me assuming it was a california car and said the dp was aftermarket even though i kinda doubted it. don't know how much of a difference that might have made in the prior numbers. car passed w/flying colors last time...the only thing the tech questioned was the coil packs b/c he thought the 7mgte didn't come w/it. i schooled him and he passed it. the only code is 51 which is Switch Signal. the check engine light is not popping up for the tech to see. car seems to idle fine most of the time on start up, but does stall out every now and then both when cold and warm. once warmed up car idles a little higher than she should (around 800-950rpm).
smog results are as follows...
----------%CO2-%O2----HC (PPM)-------CO (%)---------NO (PPM)
TEST RPM MEAS MEAS MAX/AVE/MEAS MAX/AVE/MEAS MAX/AVE/MEAS
15MPH 1652 14.7 0.5 106 / 31 / 162 0.70 / 0.10 / 0.35 762 / 237 / 847
25MPH 2739 15.1 0.1 81 / 20 / 34 0.57 / 0.09 / 0.02 701 / 199 / 286
had the b/f take it in b/c he works for benz and the test only station i used last yr gives vehicle manufacture/dealer employees a nice discount and it required a test only smog anyway. he took it during his lunch break...the car was at operating temp when he got there, but he didn't get more than maybe 5-10 mins of actually driving it before he got there (i know its usually better to drive it a little longer) also by the time they got it on the machine it was nearly an hour it had been sitting. how much do u think this might have made a difference in the numbers i got and having failed? though i know it having failed the evap could have something to w/why it failed the smog itself too.
i have a few ideas i was thinking of trying such as plugs (they aren't all the old, but i figured i would pull them out and take a look), plug wires, main cat (was running a test pipe for awhile so the main barely got any use), o2, fuel filter, injector cleaner (i figure its about time for the last 2 anyway), etc. car just had an LOF this past saturday. running 10w 30 mobil 1 synthetic. am i missing anything...any suggestions? my 87t is a federal/canada catalyst so it came stock w/only one cat being the main cat. a stock dp w/the other cat was put on before the prior smog test...this was before it was known the car was a federal and canada catalyst. previous owner had me assuming it was a california car and said the dp was aftermarket even though i kinda doubted it. don't know how much of a difference that might have made in the prior numbers. car passed w/flying colors last time...the only thing the tech questioned was the coil packs b/c he thought the 7mgte didn't come w/it. i schooled him and he passed it. the only code is 51 which is Switch Signal. the check engine light is not popping up for the tech to see. car seems to idle fine most of the time on start up, but does stall out every now and then both when cold and warm. once warmed up car idles a little higher than she should (around 800-950rpm).
smog results are as follows...
----------%CO2-%O2----HC (PPM)-------CO (%)---------NO (PPM)
TEST RPM MEAS MEAS MAX/AVE/MEAS MAX/AVE/MEAS MAX/AVE/MEAS
15MPH 1652 14.7 0.5 106 / 31 / 162 0.70 / 0.10 / 0.35 762 / 237 / 847
25MPH 2739 15.1 0.1 81 / 20 / 34 0.57 / 0.09 / 0.02 701 / 199 / 286
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