Throttle body cleaning

[Gizmo]

I just did a thorough throttle body cleaning by a workshop.

Is it normal for the idle to show more reading than usual?

Previous idle is 750rpm

With air con,850rpm

 

Now after cleaning, the idle shoot to 900rpm

With air con is 1000rpm

[Forte3737]

i think you should ask the WS since they are the one who do the job

[Mini-itx]

It means air is leaking thru your TB. Try looking if there is any manual adjustment of throttle position (usually a screw or something).

[Silver_blade]

I think it is normal. It should go back to 'normal' after a few days.

[Itsec]

I just did a thorough throttle body cleaning by a workshop.

Is it normal for the idle to show more reading than usual?

Previous idle is 750rpm

With air con,850rpm

 

Now after cleaning, the idle shoot to 900rpm

With air con is 1000rpm

 

 

i dont know about urs.. my TB can be adjustable..something to dealt with idling.. they check the resistance (ohm) before cleaning...

i cant recall (lazy to google) After clean, reset the ECU with a device... steady... very pro job but come with a price..

[Djdp]

give ur car few days to get back to normal. ecu learning

[Moredhel]

I suggest you go back to the ws to relearn your ECU idle.

[Yeobh]

Unless you rid is a high end model, you CPU do not have such relearning and data collection ability. If you disconnect yr rid battery and nothing happen that means yr rid don't come under such category.

[Gizmo]

Now coming to 3rd day, idling improved abit,but still higher than previous. Engaging gear without stepping on acc surge more too.

Didn't know ecu need to relearn after throttle body service. My car is not high end model

[Kennyhwl]

Bro, did you remove the whole TB to clean or clean it while still on the engine?

 

Is your TB using e-throttle or cable type?

 

If cable type try checking cable tension or try adjusting the fast idle screw:

 

 

 

If e-throttle type may need someone / ws with ODBII connect to ecu to relearn or reset the idling

 

[Mugen85]

I think by 1 week should be able to be back to normal....

[Yeobh]

The engine bay is wet and therefore the intake air is laden with moisture. Wet air is more dense therefore more oxygen resulting in better combustion.

[Djdp]

ecu relearning as air flow is better now

[Plim72]

After 2 weeks and 1+ tank of petrol, rpm drops to 950-1000. May i know wat is the reason to trigger the higher rpm initially after cleaning throttle body ??

 

my 2 cents...

 

actually idling is the most diffcult condition for the ecu to control due to low speed and hence longer feedback signal at TDC event. don't wish to go there so......

 

anyway in your case, the MAF actual and feedback data is incorrect after your thottle body cleaned. That result in lumpy idling. Luckily for you, the ecu is smart enough to self correct in a closed loop operation as it work on its airflow transfer function table based off ignition/fuel/lambda

[GemLeo]

prolly means your TB is really dirty in the first place.. restricting a smoother air flow..

after cleaning.. the air flow has less turbulence.. the engine should be run for 5-10mins for ECU to re-learn.... how you drive afterwards also contribute to the re-learning...

 

rpm isnt the only thing to monitor.. im sure your acceleration shd feel smoother too.. the car wun feel jerky at low accelerations.... I don't think FC will drop or anything like that.. cleaning TB is good maintenance.. :)

Edited October 28, 2010 by GemLeo

[Vtec78]

i'm driving swift sport and after cleaning TB, rpm went up. what i did was let the car idle without turning aircon on for 5 - 10min

rpm will start to go back to normal...depending on car model, some need to "reset" the TB by doing a num of steps. all these can be found by google

[Tune2themax]

hi there

 

Should avoid doing throttle body wash actually. It is not necessary. But in your case, your car should be back to normal in a few days!

[Trex101]

hi there

 

Should avoid doing throttle body wash actually. It is not necessary. But in your case, your car should be back to normal in a few days!

 

It's called preventive maintenance, you don't want to start panicking when your TB is too dirty/sticky that it cause your car to stall right.