dans93audi90s

hey i went to get my emissions testand it failed it said i have alot of carbon buildup so i was wondering are there any goond cleaners out there with my camaro i used sea foam but i dont know if this is good for these cars can you help thanx

450exc115

Sea Foam has been used by many to remove carbon but I'm surprised that is what they claim kept you from passing. What did you fail on exactly and by how much? NOx, CO, Hydro Carbons?

dans93audi90s

ok hydro carbons carbon monoxide NOx
standard 0.80 15.00 2.50
readings 1.57 5.50 3.84
results fail pass fail

axe_360

be carefull with seafoam brand its chemical is caustic

450exc115

Those numbers indicate more of an EGR problem than carbon. Does it idle OK or a little lumpy. You can also try the dry gas bottle fix.. One or two bottle of dry gas with a tank of gas generally lowers NOx and maybe even hydro carbons.

Best to warm the car up too, a good 20-30 minutes on the highway at speed always helps.

dans93audi90s

what like them heet bottles or what brands

450exc115

Any brand will work as long as it uses an alcohol as the additive (isopropal or methanol) the extra oxygen in the alcohol will bring down the NOx and CO levels. Can't remember if it will help with the carbons.. Wont hurt to beat the bag out of it before hiting the emission station either..

How is that idle?? As that will be the first indication if the EGR system is messed up.

dans93audi90s

it idles smoothly doesnt idle rough

450exc115

Ah OK.. So I'd seafoam the intake (via a vacuum hose) then run a few bottles of dry gas through it. Don't forget to get it good and hot for inspection..

dans93audi90s

ok thanx alot for your help imma take it to the emission this weekend so ima do that the night b4 and and take it in the morning because i live in chicago and the car is registered in indiana so that should be a good enough time on the highway you think?