tonicinwhite

i have an 88 944 turbo with approx. 92,000 miles.

its failing emissions not for a bad cat (Nox) but for CO and the HC's

limit for Virginia is 110 for HC's.... i got 205

limit for CO% is .44 i got 3.19


I changed the oil, air filter and put some new bosch platinum plugs in it last weekend shortly after it failed the first time with similar numbers. does any one have ANY ideas as to what could cause these numbers to be so far off the charts

the car is chipped with stage 2 chips and a lindsey boost enhancer but it passed in 2002 with the same setup with flying colors


Thank you in advance all ideas are surely welcome


Jeff