problems on my engine vacuums

[mrevo]

I'm driving wira with 4g93t engine. Nowadays my engine RPM is very late to turn down when I rev the engine, seems like the throttle body late to close. the boost meter also late to turn down. anybody knows what happened?

 

[boyzone]

is TPS had been adjusted before?

 

[mrevo]

yup...some time ago. So, is that must be adjusted again?

 

[masrun82]

i think throttle body vacuum hose was leak...

 

[boyzone]

yup...some time ago. So, is that must be adjusted again?

If TPS had been adjested some time ago, should not a problem.
Just check and see have any leakage on the vacuum / manifold and vacuum hoses.

 

[mrevo]

i think throttle body vacuum hose was leak...

I checked the vacuum hoses but no leaking/cracking. Normally, if vacuum hoses leak...the vacum will drop and make the engine RPM unstable.

 

[boyzone]

I checked the vacuum hoses but no leaking/cracking. Normally, if vacuum hoses leak...the vacum will drop and make the engine RPM unstable.

If comfirmed not vacuum leakage, just check on ur TPS.
maybe need to recalibrate.
hope can help. Thx.

 

[masrun82]

I checked the vacuum hoses but no leaking/cracking. Normally, if vacuum hoses leak...the vacum will drop and make the engine RPM unstable.

ok ....how about ur buterfly throttle....clean it....or cek ur fuel setting or cek motor oil....or cluth

 

[mrevo]

Thank's to all, the prob is already solved. Actualy, the T joint that jointing the vacuum hoses fro TB, BOV and boost meter was melted and blocked the vacuum towards the boost meter. Now, the acceleration is smooth also can boosting as well.