Please Help, Failed emisions again
 

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

To save yourself hassle, I'd do two things.

First, don't use platinum plugs, use copper. NGK BPR7ES are the most popular recommendation.

Second, put the stock chips back in. I'm sure you can pass with the aftermarket ones, but you're more likely to pass with the stock ones.

Sounds like you're running rich, so there are a lot o potential culprits for that(02 sensor, AFM, chips, etc), but I'd probably do the above two first and retest.

also, use the search feature. it's funny how every few weeks we get new users asking the same exact questions that were already covered in detail;
http://forums.pelicanparts.com/porsche-944-turbo-turbo-s/293763-951-emissions-please-help.html