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Car Forum / Chevrolet / Chevrolet Trucks / March 2008failed smog test...hydrocarbons
My 93 k1500 with a 305 won't pass smog. It tests 5 points too high on hydrocarbons. I have replaced plugs, wires,cap,rotor and o2 sensor. Anyone have any ideas???? -- Message posted using http://www.talkaboutautos.com/group/alt.autos.4x4.chevy-trucks/ More information at http://www.talkaboutautos.com/faq.html > My 93 k1500 with a 305 won't pass smog. It tests 5 points too high on > hydrocarbons. I have replaced plugs, wires,cap,rotor and o2 sensor. Anyone [quoted text clipped - 4 lines] > http://www.talkaboutautos.com/group/alt.autos.4x4.chevy-trucks/ > More information at http://www.talkaboutautos.com/faq.html http://mva.state.md.us/AboutMVA/INFO/58000-07T.htm#hydrocarbon When I had to pass the emissions here, I would use a 'Diesel fuel modifier' in a gas engine. I used the Amsoil product only around test time. In fact I would plan on a tank of gas to be run through the engine before testing. I am not selling the product, just letting you know what worked for me. The first time I used it was after I failed the test, and two days later it passed just fine. > My 93 k1500 with a 305 won't pass smog. It tests 5 points too high on > hydrocarbons. I have replaced plugs, wires,cap,rotor and o2 sensor. Anyone > have any ideas???? ...I used to put some octane booster in with premium, and ran it hard down some highway straights. Then took it to inspection hot, and left idling. The hotter the cat, the fewer hydrocarbons, and the residue and soot in the tailpipe has been blown out as well. Make sure the battery cables on both ends are good and clean also. > My 93 k1500 with a 305 won't pass smog. It tests 5 points too high on > hydrocarbons. I have replaced plugs, wires,cap,rotor and o2 sensor. Anyone [quoted text clipped - 4 lines] > http://www.talkaboutautos.com/group/alt.autos.4x4.chevy-trucks/ > More information at http://www.talkaboutautos.com/faq.html > ...I used to put some octane booster in with premium, and ran it hard down > some highway straights. Then took it to inspection hot, and left idling. The > hotter the cat, the fewer hydrocarbons, and the residue and soot in the > tailpipe has been blown out as well. Make sure the battery cables on both > ends are good and clean also. Battery cables for emissions? >> My 93 k1500 with a 305 won't pass smog. It tests 5 points too high on >> hydrocarbons. I have replaced plugs, wires,cap,rotor and o2 sensor. Anyone [quoted text clipped - 4 lines] >> http://www.talkaboutautos.com/group/alt.autos.4x4.chevy-trucks/ >> More information at http://www.talkaboutautos.com/faq.html > Battery cables for emissions? ...yes to make sure the ignition system as well as the electrical circuits are at their highest efficiency for proper burn. >> ...I used to put some octane booster in with premium, and ran it hard >> down [quoted text clipped - 15 lines] >>> http://www.talkaboutautos.com/group/alt.autos.4x4.chevy-trucks/ >>> More information at http://www.talkaboutautos.com/faq.html > > Battery cables for emissions? > > ...yes to make sure the ignition system as well as the electrical circuits > are at their highest efficiency for proper burn. Considering your battery does nothing but charge while the car is running, I fail to see how it helps A less than clean ground can cause less than great firing and sensor inputs >> > Battery cables for emissions? >> [quoted text clipped - 4 lines] > Considering your battery does nothing but charge while the car is running, > I fail to see how it helps |
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