SC build help!
 

A few of you know I SCd my LE5 last year before snow flew. Well I left it for the winter, got a stage 2 clutch put in and the recalls fixed. Now I'm back and chasing down a few problems that are driving me batshit crazy. Can't get car to stop misfiring. I'm running NGK LFR6A-11. I throw code P0121 after a couple of miles, I'm on a brand new LSJ TB. My code scanner also shows evap system isn't ready and fuel system isn't ready. I'm running 80# injectors, stock pulley. ZZP Canned tune. (barf) Evap I'm sure is a vacuum issue. How do I go about connecting the throttle body to the evap solenoid we have? Also, coil packs MIGHT be a possibility but the car never misfired until after supercharging. Oh and it idles like garbage and I get shit gas mileage.

So I had p0121 and p0106 constantly after I went sc. I read on the hpt forums that you had to change a value to keep the codes from coming back. The value had to do with when the ecu runs a check on the throttle position sensor at a certain engine coolant temp. I had to set the check to run at an ect that the engine would never get to. I think like 257℉.

When I get home, I'll post the thread from hpt to here and you can read it as well. I'll also look to see what I changed to keep them from coming back.

It's your throttle body make sure the harness is connected good to the throttle body it must be all the way down. Did you buy 8pin connector from zzp or rewired your harness?

I purchased ZZPs adaptor harness. The only wire splicing I did on my car was for IAT2 monitoring.

Ok on that harness there is a purple cap on the end of the plug in remove it and plug it directly into the throttle body.

I used the harness as well. I think I may have found the issue though.