Hi, hope you guys can help solve this problem. I have a 91 fj80 with with the 4.0 3f motor with a lift and 33's, aside from that its stock with 112k on the clock and runs great. I went for emissions and the CO reading was at 70 or so with the limit being 25. I had the oil changed, at which time they ran some sort of engine cleaner through it and put in a new K&N drop in air filter. The truck now registered at a 65 which is still over double the limit. No check engine light on or anything. Any suggestions would be greatly appreciated. Also not sure if it matters but I dont drive it much, maybe 3000 miles in the last year or so.
Thanks,
Ali
Thanks,
Ali