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91 civic fails emmisions test - 1991 Honda Accord

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Look at your fuel system and exhaust, if there any holes , cracks , or sections missing it's going to fail, ,,, I need more detail on the car

Posted on Apr 18, 2014

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Posted on Jan 02, 2017

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2 Answers

1995 Honda Civc failed Emmisions test


Emission test by codes reader? or smog? Any codes?

May 22, 2017 | 1998 Honda Civic

1 Answer

Hello, took my car for emissions test and fail with the following codes. p0101,p0171,p0174,p0300.


well go back and ask for proper print out of what the emmisions readings are ,i cannot beleave that a vehicle test station can fail a vehicle and not tell you what the emmisions readings are but give you a lot of useless p numbers ,dont they put a probe up the exhaust and test it properly ,They would have field day trying to test europeon cars here in europe with all the encrypted software used on vehicles here and the vehicle shutting its self down with the immobilisor and throwing out code p whatever for illegal access to the ECU.any way try changing the lambada sensors as i think that this is what code P171 and 174 refer too

Jun 21, 2010 | 2001 Cadillac DeVille

1 Answer

1993 honda civic ex will not pass HC emissions test. Please help


You don't say what state you are in and what the requirements. The early 90s Honda Civics frequently are high on emissions under certain circumstances depending on how the test is run. If you are in a state that allows you to get a waiver with a certain amount of repair - that would be the recommended way to go. A lot of times the amount required is enough to detect the problem, but if not it is basically the cost of keeping the car. I am in Washington State and my 91 Honda Civic runs great and gets 38 mpg but fails the test. I have a new O2 sensor, catalytic converter and distributor and fail. I pay $150 for repairs / waiver every 2 years - and I am an ASE Certified Master Tech. I figure $75 a year saves me a car payment.

Dec 16, 2009 | 1994 Honda Civic

1 Answer

91 civic runs fine but stalls without warning


Could be many, many things, but just off hand I would have your fuel pump checked. Almost any garage should be able to tell if your fuel pressure is where it should be. The problem, of course, is that a failing fuel pump will run all right, and then it won't, and then it will. Eventually it will fail altogether and then your car won't start of run at all.
Hope this helps.

Oct 30, 2009 | 1991 Honda Civic

2 Answers

1996 jimmy failed an emission test


Did you change the air filter. The fuel filter will have no impact on emmision's but the air filter is a very common problem.If you usually drive it at low rev.'s then before you send it for emmisions test you will need to put it in a low gear and floor it for about a mile the reason is when it is being tested the engine is reved up to around 3500 rpm and any build up of unburned fuel or oil in the exhaust system will put up the emmisions reading.

Aug 19, 2009 | 1996 GMC Jimmy

1 Answer

Spark plug failing Fix and emmision test says still misfiring


try changing the o2 senser that will cause the car to run rich or lean

May 16, 2009 | 1998 Ford Windstar

2 Answers

Failed emmisions test..


I am in Virginia but I believe you vehicle is showing a monitors not ready for Catalyst & Evap. If that is correct you need to basically drive the car a few days. The computer will remonitor itself and should be fine following that. Most drive cycles require highway driving & city driving. Make sure you turn on a/c as well. Its not how many miles you drive but what conditions you drive that sets you monitors. You could locate the drive cycle and attempt to replicate it but its usually very difficult drive exactly as the cycle asks. Good luck.

Mar 18, 2009 | 2003 Mercedes-Benz CLK-Class

1 Answer

91 honda civic dx. Starts, runs for a few seconds then stalls


Try pounding on the gas tank with a rubber mallet or similar tool. (careful not to dent the tank) Try starting it. If it runs, replace the fuel pump (it's nfg). I've diagnosed numerous fuel pumps this way. Remember the pump needs to be replaced, if you drive it, you don't know when it'll fail for good. Hope this helps. Please post the results.

Feb 07, 2009 | 1991 Honda Civic

1 Answer

My '91 honda civic doesn't start


Check the battery terminals and make sure they're not loose...also check any other grounds that may be bad or broken.

Nov 03, 2008 | 1991 Honda Civic

2 Answers

1996 honda civic emssions failure


If you failed you should know if it is HC, NOx, or CO. Posting that will make it much easier to diagnose.

Jun 14, 2008 | 1996 Honda Civic

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