2WICE

got my truck smogged today for registration.. and if failed miserable..
scored a 3346 for HC at 2500rpm, and 3215 for HC at idle.. in order to pass its suposed to be under 220..

any ideas?

4Crawler

iTrader: (3)

http://www.interro.com/techgas.html#anchorfour

2WICE

great info.. thanks.. i thought i was having some misfire issues.. now im kind of sure..
im gonna take it into a shop on monday... thinking bout a new ignition wires and plugs anyway.. so this might be the straw that busts my wallets back..

4Crawler

iTrader: (3)

Fresh oil change as well and make sure the engine is good and hot, drive 10-20 miles at speed (at least) before retesting. Check your O2 sensor or replace if it is old (I keep a brand new sensor just for smog tests).

Also consider adding 10% denatured alcohol to the gas tank. Adds O2 to the fuel, helps reduce HC/CO levels, also make sure your timing is fully advanced.

2WICE

thanks for the tips...
how do i advance and retard timing correctly on a 3.0?

2WICE

never mind.. i shoudl eb able to find that on my own..

4Crawler

iTrader: (3)

You'll need a timing light to check and set the timing.