Question about 1993 Buick LeSabre
I change oil,plugs and wires it read 656 ppm it need to be 220 ppm
You don`t say if this reading is at idle or during the drive portion of the e-test.hydrocarbons is unburnt fuel which could be even an over rich condition such as too much fuel through the injectors or a bad tps switch,map/af sensor,the car could be running too cool indicating it needs more fuel.you don`t say what the other gas readings where during the test as this can help find the problem even if they fall within acceptable readings.you might want to have this checked out at a shop that knows how to diagnoise emmission problems.
Posted on Feb 09, 2012
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Posted on Jan 02, 2017
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