QLDS2K

Hey guys,
I installed a new throttle body on the car today.
Car drives fine, accelerates perfect. But i first noticed it would decelerate really low.
So i reset the ECU
It idling very low and if i touch the accelerator it revs up and then drops down so low it stalls.
I have a KN filter, could it be issues with the oil on a sensor ?
Please Help.

jst2878

Sounds like a vacuum leak. Something has a crack in it or just plain old loose. Did you mess with the valve cover gaskets?

franky

Everytime you disconnect the battery or reset the ecu, the idle will idle very low n stall if u gas it n let it go. There r two ways u can fix this with the idle relearn procedure. One, just let it idle for a good 10-15min or do the relearn steps.

rosodigital

If it's an AP1 I remember from my 2 old AP1's that making changes to the engine cause the ECU to need to take a little time to adjust to changes. Particularly when it has to do with air delivery. Resetting the ecu I would always idle low or stall off throttle until the engine computer could get itself in order with air, fuel etc. drive it around the neighborhood for 10-20min with lots of starts and stops, off throttle decel. Let the computer try to learn how run the motor with the changes.

Forcedbird

Did you install the o-ring for the MAP sensor?

QLDS2K

I have reset the ecu, let it learn to idle for 7mins and took it for spin, still having the stalling issue.
Tried adjusting the TPS sensor, no luck.
Could be the valve gasket as i noticed a bit of oil around the valve cover.
Could it be the stock ECU doesnt like the larger TB?

QLDS2K

Spot on buddy, i just checked the old throttle body and that oring was still in it,
Chucked it in the new one.
Running like a dream.
Thanks.

_brandon

Yeah that happened to me once. Car was running REALLY weird, like I would go and sometimes the engine would just die. Scared the crap out of me. 5 miles later I found out the o ring was missing