1989 RR hydrocarbons in 2400ppm range - Land Rover Forums

Frank4 · #1 09-19-2011, 12:22 AM

I knew this truck was not going to pass emissions inspection but I ran it through for a baseline. The acceptable range is 220 ppm and this beast is spewing 2400 ppm. The truck has a 4.6 short block from a 2003, rough idle but doesn't die. I changed the plugs and it now has a little smoother idle but not much. My plan is to change the oil/filter change air filter, O2's and retard the timing to smooth the idle. I want to avoid getting new cats just because of cost. I can title it so I don't have to go through inspection but I would like to know if anyone has had any luck lowering hydrocarbons from 10x the acceptable limit.

Thanks

Rovin4life · #2 09-21-2011, 08:09 PM

check compression to make sure the valves are hanging up and the rotor is good. Seen aftermarket rotors cause all sorts of problems.

Frank4 · #3 09-26-2011, 12:48 AM

Thanks, I will give it a look.