I just thought of something yesterday, would changing the throttle body to a larger bore affect my emissions when I get tested at the Illinois Emissions Testing station? I need to know whether I should hang on to the old one instead of sending it in. Thanks in advance!

 

I`m running a 53 TB on mine works like a hot damn ....

 

I used to live in TN and the short answer is NO. I had my 52mm Fastman and no problems at all with emissions. As long as you don't get an Evap problem with accidentally breaking the hose in the process (happened to me Doh!) then you shouldn't have any problem with the swap.

 

Right on. I'm giddy over this now.

 

They test the emissions buy plugging their machine into the OBD-II port by the drivers knee in your rig. The machine pulls it's information from the readouts on your PCM through the OBD-II port. In short, unless your check engine light is on or broken you should pass emissions no problem.

 

When did Illinois start testing for emissions? I've lived here 10 years and never heard of that. Did i miss that memo....lol.

 

It could be the area that he is in. I know I used to live in Tennessee and in Nashville area they tested for emissions but in Knoxville area I believe they don't.

Freakin' politics!

 

I live just outside Chicago in Crook County so they HAVE to get their cut on EVERYTHING that exists in their jurisdiction. I don't know if it's mandatory all over the place, but in the areas surrounding the state of Chicago it's mandatory. You can imagine my wallet pains having to buy gas for my 5.9 D in Crook County. Yikes I'm getting depressed thinking about it. Oh well! You gotta pay to play!

 

I have a 52mm on mine. MPG dropped a little. I get about 10-14. Before, i was holding 11-14. Maybe the drop was due to having more air coming in so the pcm have to adjust the fuel mixture? It could be my custom ram air intake as well. not sure. But the slight drop was worth having a big response on the throttle.

Saving up for the F1 airgap intake to see if I can get some serious MPG increases that most owners are reporting if they keep a light foot.

 

Hey Kensai, Welcome Back!

IndyD