i went through emissions today and failed....crap!
the car is an 91 325i
2.7 stroker, P&P head, dbilas itb's, 300ish duration cam of unknown manufacture, shorty headers, BRAND NEW CAT INSTALLED LAST NIGHT!, new plugs last month, seafoam'ed the topend and tank the weekend before the plugs, did a new O2 8 months ago (four of which the car wasn't driving), and it has a split second piggyback for the MAF conv.
every time i have taken it through emissions, i just put a new cat on it (big cam destroys it over time) and through it goes with flying colours.
this is the first time it was a no go.
here's what happened today:
get the car up to temp and the cat nice and hot driving to emissions testing station.
pull in there is no line to wait in. hand over the keys, stand in the booth.
watch the guy test the car 5 fucking times in a row!!!!!!!!
so i ask him what the hell is going on? "it shows you don't have enough exhaust coming out the tailpipe like you have an exhaust leak or the new cat isn't letting enough through"
WTF? i know there is no exhaust leaks.
i pull it into another bay to test it on another machine at there request. test # 6!!!! now i am thinking HEAT SOAK!!!! go through the test and.....
FAIL: HC 1.00 allowable i blew a 1.09
PASS: the CO2 @ about half the limit
FAIL: the NOX 2.50 allowable i blew a 4.0
the car is an 91 325i
2.7 stroker, P&P head, dbilas itb's, 300ish duration cam of unknown manufacture, shorty headers, BRAND NEW CAT INSTALLED LAST NIGHT!, new plugs last month, seafoam'ed the topend and tank the weekend before the plugs, did a new O2 8 months ago (four of which the car wasn't driving), and it has a split second piggyback for the MAF conv.
every time i have taken it through emissions, i just put a new cat on it (big cam destroys it over time) and through it goes with flying colours.
this is the first time it was a no go.
here's what happened today:
get the car up to temp and the cat nice and hot driving to emissions testing station.
pull in there is no line to wait in. hand over the keys, stand in the booth.
watch the guy test the car 5 fucking times in a row!!!!!!!!
so i ask him what the hell is going on? "it shows you don't have enough exhaust coming out the tailpipe like you have an exhaust leak or the new cat isn't letting enough through"
WTF? i know there is no exhaust leaks.
i pull it into another bay to test it on another machine at there request. test # 6!!!! now i am thinking HEAT SOAK!!!! go through the test and.....
FAIL: HC 1.00 allowable i blew a 1.09
PASS: the CO2 @ about half the limit
FAIL: the NOX 2.50 allowable i blew a 4.0
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