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Replaced spark plugs, plug wires, oil change. checked battery along w/ alternator. O2 sensor, and a new catalyc converter. still wont pass smog. what is the problem...
No has not come on for some time now P1074 and one P1074 pending other smog parts replaced though now higher emissions now gross pollute? my private mechanic thought my car wou,ld pass came up more richNo has not come on for some time now P1074 and one P1074 pending other smog parts replaced though now higher emissions now gross pollute? my private mechanic thought my car wou,ld pass came up more rich
FPS, fuel filterm uypstream o2 we are going to replaced downstream O2 form CAT Cat has not been testedFPS, fuel filterm uypstream o2 we are going to replaced downstream O2 form CAT Cat has not been tested
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A tune is just replacing the spark plugs every 100,000 miles and the air filter every 30,000, clean oil is also a help in passing smog, the new converter is what will most likely do the trick.
Are you burning oil? Does this car still have a catalytic converter? Have you changed spark plugs or air filter recently. There are many causes for a high hydrocarbon reading: burning oil due to rings or valve stem seals; catalytic converter malfunctioning or missing; vehicle in need of a tuneup or air filter replacement. Poor combustion results in high hydrocarbon levels. Good luck with it.
you need to do a major tuneup !!!!!!! replace air & fuel filters, spark plugs & plug wires, distributor cap & rotor, replace OXYGEN SENSOR, change oil & filter, hopefully your catalitic converter is ok, if not , it should be replaced !!!!!!!!!!! together w/tuneup would be the best way to assure passing emissions !!!!!!!!
Hello! when you say you checked the MAP sensor what do you mean? Did you take voltage readings at idle ? A vacuum leak is the likely culprit, especially to the MAP...The minor shake at idle being the major clue...Send a comment...guru..saailer
on older models its a little bit tricky did you try changing o2 sensors thats one of the main reasons it wont pass also your catalyc converter might be out that also happens to go out when you dont replace 02 sensors
We had to have the calatic converter replaced. We did this after doing an oil change, air filter change, and new spark plugs and still hadn't passed smog. After changing the calatic converter it passed smog with scores of 25.
check for vacuum leaks especially around the intake manifold gasket. Although the engine appears to be running rich, it could also be misfiring due to being too lean in one cylinder. When the cylinder doesn't fire the charge, it goes into the exhaust completely unburned and looks like a rich running condition due to the unburned fuel. If it is a vacuum leak causing the problem, the engine will run fine at road speeds but misfire at idle and not pass smog.
Is your check engine light on?
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