Question about 1997 Honda Civic
Jose, I don't know if this will give you the answer you are looking for because there are many things to consider here. The exhaust gas recirculation valve (EGR) is one of the main things involved in reducing NO emissions. This valve is controled by the power control module. (PCM) This is your vehicles computer. The PCM monitors the vehicles speed and will command the EGR to open when the vehicle attains a certain speed, which is why the ASM test being done is recorded at two different speeds. At 25 MPH your vehicle failed the hydrocarbon (HC) emissions limit and this could be for a number of reasons. When is the last time you car was tuned up? Old spark plugs, wires, clogged air filters, oxygen sensors, leaking injectors (personal experience) or the PCV valve could be contributing to the results of the test. I guess that the easiest way to go is to tune up the engine replacing the spark plugs, wires, air filter and the PCV valve and don't forget to have the oil changed at the same time. Only then should have the vehicle retested and see what the results are. Should it fail again you may have to consider having the EGR or the catalytic converter replaced depending on what portion of the test fails. If the NO fails I would consider the EGR. If the HC fails then I would consider the catalytic converter. Good luck with this.
Posted on Apr 05, 2011
Try an additive called " emission pass" sold at most reputable auto parts dealers. for about 8-10 bucks a bottle. Add to about a half tank of gas and drive for a few days and run the inspection again. I have 245k miles on my 1991 Chev p/u and have good results with it. The engine has never been opened on it. For ten bucks it's worth a try to buy another year on the inspection. Good luck!!
Posted on Apr 05, 2011
a 6ya expert can help you resolve that issue over the phone in a minute or two.
best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
the service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.
Posted on Jan 02, 2017
Tips for a great answer:
Sep 26, 2014 | 1997 Honda Civic
Feb 24, 2011 | Chevrolet Astro Cars & Trucks
Jul 09, 2010 | 1997 Honda Civic
May 17, 2010 | 1991 Honda Accord
Apr 17, 2010 | 1997 Cadillac DeVille
Mar 10, 2009 | 1991 Plymouth Voyager
Jan 03, 2009 | 1992 Honda Accord
1,294 people viewed this question
Usually answered in minutes!