since i last posted on my 92 marquis(4.6) failing emissions,the hc and co's where way past the standard,i gave the car a tune up and upon taking the egr off found clogged orfices in the throttle body ports and cleaned them and the egr,even replaced the egr tube(had a small hole in it,)the car had troble codes relating to the egr ,upon the work i did and clearing the codes,the light has stayed off and the car really runs like new ,but upon taking it back it failed again,but this time the co was far below the standard(passed) but the hc was just a hair over(the standard is .80,it tested at .88) this is just my luck,someone suggested running the tank to about empty,putting in a product that auto zone sells in the line of"emission pass helper"a fluid that is supposed to help ,then topping it off with a gallon or two of high octane gas,whats your opinion of this??or is there some thing else that could help to get it a hair down in the "old tricks"catagory?? thanks bob
- posted
17 years ago