Question about RPM drop?

[ambrose95talon]

While driving if i get the rpm up to anything really above 3grand and push the clutch in and hit brakes the rpm will drop to zero then come back up to normal idle range.

Its only stalled on me once. Any ideas im lost looked around all ready.

 

[steve]

ISC or bad BISS adjustment?

Steve

 

[psychlow]

What is your vacuum like at idle?

Do the RPMs drop significantly if you step on the brakes while the car is in neutral and idling?

 

[steve]

Do the RPMs drop significantly if you step on the brakes while the car is in neutral and idling?

You looking for a vacuum booster check valve leak?

Steve

 

[DSM MAN]

If I push on my brakes while im in neutral the rpms will drop by about 200. Is that too much? Where, and how would I normally find vacuum leaks? Thanks.

 

[ambrose95talon]

Ill have to check vacuum but say im accelerating through to 3 and i need to stop quick as soon as i push clutch in and brake it drops straight to about maybe 100 or 50 rpm then bounces back to around 500 to 800

 

[huafist]

Is it throwing any CEL codes?

 

[ambrose95talon]

Vacuum is at about 19 in. at idle, Not sure on CEL

 

[steve]

Is the Idle Position Switch inside the Throttle Position Sensor correctly adjusted so that the ECU knows your throttle is closed and to manage the engine speed?

On a 2G the IPS switching at the correct point is more important than TPS values.

Steve