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Car Forum / Honda Cars / September 20061992 Accord failing emissions test
I have a 1992 Accord EX 4 door auto with 184,000 miles on it. It runs fine except for two problems. The latest is that I've failed emissions with a CO% score of 1.97 it should be <.50 at idle and a score of 2.07, it should be <.73 at 25 MPH. I passed both of the HC and the NO tests. The car was warmed-up for an hour before the test. This was my second attempt. I actually did better on the CO idle test before I changed the spark plugs to the Bosch dual-tip platinums. I had the O2 sensor replaced in February. After that repair, the green "D" light on the transmision indicator started blinking which is my other problem. The repair shop said that it was coincidental that the blinking started after the O2 sensor was replaced. Since the car ran fine, I just lived with it. Is there a connection between the two? Thanks in advance, Jimbo "Jimbo" <creshendo396@yahoo.com> wrote in news:1157070951.448611.7180 @m73g2000cwd.googlegroups.com: > I have a 1992 Accord EX 4 door auto with 184,000 miles on it. > > It runs fine except for two problems. The latest is that I've failed > emissions with a CO% score of 1.97 it should be <.50 at idle and a > score of 2.07, it should be <.73 at 25 MPH. I passed both of the HC and > the NO tests. The car was warmed-up for an hour before the test. What are your ACTUAL numbers for ALL gases? Was there any CO2 reading?  SignatureTeGGeR® The Unofficial Honda/Acura FAQ www.tegger.com/hondafaq/ > I have a 1992 Accord EX 4 door auto with 184,000 miles on it. > [quoted text clipped - 17 lines] > > Jimbo Just out of curiosity.. What kind of plugs did you replace with the Bosch dual-tip Platinum plugs? marco SignaturePosted via a free Usenet account from http://www.teranews.com > > I have a 1992 Accord EX 4 door auto with 184,000 miles on it. > > [quoted text clipped - 24 lines] > > NGKs, but I don't have the exact right now. They looked perfect except the gap looked like around.050. > I have a 1992 Accord EX 4 door auto with 184,000 miles on it. > [quoted text clipped - 17 lines] > > Jimbo suspect weak spark or dribbling injector. the latter is fixed with injector cleaner, the former by servicing the ignition system. stick to ngk plugs. spark plug leads get weak after time. also, does your accord have an ignition condenser? if so, consider replacement. > > I have a 1992 Accord EX 4 door auto with 184,000 miles on it. > > [quoted text clipped - 22 lines] > ngk plugs. spark plug leads get weak after time. also, does your > accord have an ignition condenser? if so, consider replacement. I agree, however, the NGKs that Ipulled were in perfect shape at 26,000 miles except for the gap was huge. If the wires were suspect, wouldn't there some signs of fouling. I put in some Chevron Techtron and filled the tank with Chevron HiTest. >>> I have a 1992 Accord EX 4 door auto with 184,000 miles on it. >>> [quoted text clipped - 26 lines] > miles except for the gap was huge. If the wires were suspect, wouldn't > there some signs of fouling. not necessarily - spark would have to be mostly absent for that. weak spark can be a strange beast to hunt. leads can give problems at any time. i had a new set of oem leads on my civic, and they started giving problems after only 20k miles. plugs always looked fine. these days, i'm running magneor electrosport leads, and while i'm usually a big advocate of honda oem componentry, there's no doubt the magnecor's perform much better across the whole rev range. > I put in some Chevron Techtron and filled the tank with Chevron HiTest. |
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