Since it wasn't doing this before the tune I would suggest contacting ION and let him know what it's doing. There may be a lean spot or a timing transition that needs to be smoothed out. I also agree with peeps above that you shouldn't be running RPM's that low. What do the specs on the cam look like? Another thing to look for is bad plug wires. If you open the hood at night while the car is running and inspect all of them you might be able to see if any of them are arcing.

Thanks for all the input. I'm definitely going to contact them I'm convinced it is running rich the exhaust is very potent and actually burns your eyes. I'm going to put a new set of wires in there for the piece of mind any how. As for the driving habits are you suggesting I tach higher while driving? The specs on the cam are 218/228, Lift .492/.492 112 lsa.

When using more then lets say 20% throttle you should be at atleast giver or take 2500 rpm and if flooring it keep rpms up

surprised nobody said it....



it's the opti...



lol

Brand new opti,coil,plugs,icm. I contacted madz28 the guys said with it running cooler (had them command fans sooner) it will run richer. I am going to use the sniffer on the inspection machine to get readings on the exhaust to see how rich or lean it is. Any body suggest adjustable FPR?

My suggestion is a dyno tune with your car there. A wideband before the cat. And maybe something to log.

I would have thought that he would adjust the AFR for cooler running temps. I wouldn't use and adjustable FPR to lean it out because that will lean it out all across the board. A dyno tune would be best or do some data logging and get it adjusted. Otherwise you'll have to live with it.

Playing with the fuel pressure wont matter, the ecm will always try to achieve stoich via the o2s.

Playing with fuel pressure is like adding larger or smaller injectors without changing the constants in the PCM.