Ok I've done a search and before I start drilling into the throttle body I just wanna ask. Right now I've slotted the TPS, I'm getting .92 volts right now at idle....BUT my IAC counts are still 120ish and the idle is ruff and sometimes I stall stopping. So to get the IAC counts down I've tired to keep opening the blades with the screw but at this point I cant go any more without throwing a TPS code. So do I drill the IAC opening to allow some more idle air in? Do I drill holes in the acutally TB blades? My set idle is 1200rpm and yes I am running a VERY large 24x/25x on a 110 in a 350 so that doesnt help things. Before switching to the 58mm TB the stock 48mm didnt give me any problems. Its obvious the motor is starving for air so how do I feed it more?

Jason

 

i had the same problem. my cam isnt quite that big but it is almost and is also on a 110 lsa. how much have you slotted the senser? i had to to open my holes up a BUNCH. i think my reads around .6 or .7.

 

You need to slot your TPS sensor and adjust it. You can lower the voltage that way, and then open up the throttle blades more. Keep opening them till the IAC counts are reasonable. Mine are in the low 30's at idle, and my TPS voltage is around .60.

Edit: I just reread and saw you already slotted the TPS. Just adjust the voltage down and keep opening those blades man!

 

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