Hello I have a 1988 Toyota pick-up, its a 4 banger with 4wd (manual). I recently took it in to get it smogged in California and it passed everything (visual and functional) except the emission test because of the NO and CO. The truck had been sitting for a while besides the occasional start up and let it sit for a little bit and used to pass no problem, but now it wont. Below are the emission results. The person who tested it said that the reason the first CO was high was probably because the NO or it wasn't hot enough. Before we got the test we ran it for a while and made sure to have barely any gas in it and then filled it. Once we got there and sat for a while and probably cooled down. I was wondering if anyone has any ideas on what is wrong and/or what I should check out. ANY HELP WOULD BE GREATLY APPRECIATED.
TEST (15mph)
RPM: 1612
%CO2: 14.1
%O2: 0.8
HC (PPM)- MAX:135 MEAS:106
CO (%)- MAX:0.87 MEAS:0.91
NO (PPM)- MAX:1058 MEAS:2410
TEST (25mph)
RPM:2537
%C02: 14.1
%O2: 0.8
HC (PPM)- MAX:115 MEAS: 42
CO (%)- MAX:1.08 MEAS:0.31
NO (PPM)- MAX:918 MEAS:1738
*MAX=Maximum Allowable Emissions MEAS=Amount measured
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Sunday, November 1st, 2009 AT 6:46 PM
