new throttle body, ECU need tuning?

[AZTEK90]

Hey whts up just had a quick question. i recently got a new throttle body for my stock b18a in my 91 teggy . the throttle body is overbored out too 62mm and has a weapon r quick throttle rotor . just wondering if i have too modify the computer or anything else so it can run right.right now its running good except when i turn it on it stays reved up 2k rpms.kinda new at this so any opinion would be nice ........thanks

 

[Merlins Beard]

since the TB is larger than the intake manifold, you should have the intake manifold port matched to the throttle body. You will also need to have a TPS calibrated to the larger TB size. Have you tried adjusting the idle at all?

 

[AZTEK90]

Yeah I tried adjusting the idle but nothing really changed .and it has a new tp sensor which I assume is adjusted ....... Wht kind of shops would,be able to port the intake,manifold? Maybe,a machine,shop?

 

[DaddyBuiltRacing]

spray some carb cleaner around the manifold, if the idle drops then you have a gasket leak That would explain the high idle

 

[Samurai_Blue]

or the throttle cable is too tight

 

[DaddyBuiltRacing]

^^ Yeah that too

 

[AZTEK90]

the throttle is good just checked and no leaks either ......anymore ideas just want to make sure everything is running good...

 

[Samurai_Blue]

did you mess with both idle screws at top and bottom while the car is running? via unplugging the iacv?

 

[AZTEK90]

Were is the second idle screw located? Wht do u mean via unpluggin the iavc, do I have to unplug it in order to adjust them