Engine Mechanical problem
1986 Other Suzuki Models 4 cyl Four Wheel Drive Manual 148500 miles
Have a 86 Suz. Samurai, 4cyl 1.3L trying to get through emissions. First time fail report : HC 4.18 / 3 FAIL, CO 66.17 / 25.00 FAIL, NOX 0.83 / 4.5 PASS. After this test changed Air filter, spark plugs, emptied old gas (car had been sitting for 2 years before I bought it, but was only able to syphon 3/4 of it out), Filled the tank with 87Oct and added Gumout Carb Cleaner & Octane booster, and changed PCV. I went for the second test, extremely improved, but still failed. Fail report #2 HC 2.73 / 3.00 PASS, CO 26.43 / 25.00 FAIL, NOX 1.92 /4.50 PASS. They continue to tell me that I am still running rich, and that is what is causing the problem. Ok. So I go home, replace vacuum lines, replace faulty Vacuum Valve & Mixture Control Valve (ran test and found out they were faulty.) Went to checker to get the parts, and explained my situation, he proceeded to tell me the old try and true method of adding Iso Alcohol to the gas tank & that would help run leaner. Well, I topped of the tank with 91 Oct, added 1/2 pint or so of Alcohol to the tank, ran it all over town and burned up a 1/4 tank of gas, went to the emissions test #3. I went way off the charts again. Fail report #3 HC 3.86 / 3.00 FAIL, CO 69.01 / 25.00 FAIL, NOX 0.93 / 4.50 PASS. I have done repairs for three days now, and on the second test I greatly improved, but cannot understand why I failed again so miserably on the 3rd test. This time instead of telling me I am running rich, and I explained I checked and replaced most of the things that could of been causing that before the 2nd test. They told me it could be my catalytic converter. Is that possible looking at these readings from 3 test that happened with 2 days? How I can go from bad to nearly passing, and then right back to bad? There is black soot & some condensation coming out of the exhaust, which last only a cpl of minutes, but will be fine the rest of the day, usually only happens when the engine is cold. Is there something obvious like the Cat that needs to be replaced, or are the readings showing the problem might lie elsewhere? Thanks for any assistance.
have the same problem?
Friday, January 16th, 2009 AT 4:55 PM