Engine reeving

[romeric]

Hello peeps,
Need some help here the engine on my 1992 Yukon reeves a little by itself when on idle. Wanted to know if anyone know the cause of it, and how to fix. It is also throwing code 32 and the engine has been converted to a TBI if that helps. Thats how i bought it. thanks

 

[drakon543]

what kind of revs r you talking? if the idle air control valve is going it could randomly jump to around 1500 and our stall out. if the tps is getting fidgety it could sense throttle movement and increase the spray in the injectors. if someone has already been messing with it and failed to properly reseal the tb the lower gasket could bleed some excess air through. lastly again they could have failed to properly reseal the upper housing that feeds the fuel to the injectors. last one would likely cause other issues aswell as it would be dumping excess fuel throughout the rpm range.