I just installed the TNT F2 kit on my 96 Z28. Actually, I just got the plate and all the lines installed, just have to wire the electrical. Anyway, the car won't start unless I pump the throttle, and then it won't idle at all. I checked for vacuum leaks and made sure the seal at the intake/TB area was good, but everything seems like it should be. I did notice that the N2O plate did not have a area for the idle air (I believe that's what that is, the area on the TB just below the throttle blades, kinda a triangle shape) to come through. Other than that, the car runs great. Is there anything I am missing here? Do any of you guys have any suggestions or hints for me?? I would greatly appreciate it! Thanks!

 

hrm do you have a fuel pressure gauge between the schrader valve and the fuel solenoid? you could remove the PCM BATT fuse from inside the driver side door jam for 10min or so to reset the learned IAC value.

 

Dave, I don't have a fuel pressure guage in there, but I know it isn't a fuel problem. The car ran great before the install, and then I put the plate and solenoids on, and I decided to make sure my FP was correct before I installed the fuel feed line, so I hooked up my portable guage to the fuel rail to check the pressure, and that is when it would not idle. I had to hold the throttle blades open just a bit to get it to idle. I checkd the pressure and then installed the line. After that it still wouldn't idle. Just for ****'s and grins I did disconnect the battery for about 30 minutes hoping that it would reset the IAC, but it did not do any good. Right now I have no idea why it is doing this. Tomorrow I will probably pull it back off and put it back together stock and see if it goes back to the way it was. Thanks for your reply.

 

You'll have to open up the passage from the throttle body to the intake by drilling out a hole in the plate.
Matt

 

What size hole should I drill in it?? Is this a common thing on LT1's? Why havn't I heard of this problem before? Thanks for the input!

 

Try to match the hole up with the triangle shaped hole that is in the bottom of the throttle body gasket. I have heard of this happening very rarely but not too often.
Matt

 

I just installed a TNT kit on my LT1 and had the same problem. I answered your thread on the TNT site, check it out

 

Thanks for the replies guys. I guess I will drill the hole in the plate that is supposed to be there. I think it's kinda funny that some cars have this problem and not others. I took the plate off again last night and the car runs perfectly now, so I know that is what the problem is.