Our 2001 Oldsmobile Silhouette engine raising

It's called IAC - idle air control valve > Did the RPM'S stay at 2000 or drop back down ? The PCM engine computer controls IAC valve according to engine load . Put it in gear , turn on electrical loads , headlamps , A/C etc... an the RPM raise's up so engine will not stall . More then likely the throttle plate needs to be cleaned , they get gummed up an stick at higher idle . Quick Tip Throttle Cleaning EricTheCarGuy If the IAC valve were gummed up the idle would be low or erratic . On some engines a vacuum leak will cause high idle . Videos on youtube checking for vacuum leaks .

Can you give us the rest of the story, such as are you driving or setting at a stop, is the engine hot or cold, and so on ?

WHERE YOUR AIR BOX IS FOLLOW THE HOSE3 OVER AND IT IS CLAMPED ON ADN UN CLAMP IT AND SEE IF NTHEMASS AIR FLOW SCREAN IS COVERED WITH CARBON IT SHOULD BE REALLY SHINNY AND CLEAN IF IT ISW THEIR IS A MASS AIR FLOW SENSOR CLEANER SPARY THAT YOU CAN BUY FROM ANTY PARTS STORE FOR ABOUT 10.00.

knock sensor bad

Sounds Like A Problem With your thermostat. Good Luck

Removal & Installation

1. Before servicing the vehicle, refer to the Precautions Section.
2. Drain the cooling system.
3. Drain the engine oil.
4. Relieve the fuel system pressure.
5. Remove or disconnect the following:
   CAUTION Failure to remove the intermediate shaft from the steering gear may result in damage to the gear or intermediate shaft and may cause a loss of steering control.
   
   
   Negative battery cable Fuel injector sight shield Throttle body air inlet duct Cruise control cable Accelerator control cable Radiator hoses from the engine Heater hoses from the engine Engine mount struts Fuel lines from the fuel rail Engine wiring harness connectors Vacuum hoses Brake booster vacuum hose Automatic transaxle range selector cable Wiring harness grounds Catalytic converter three-way pipe from the right side exhaust manifold Front wheels Splash shields Stabilizer shaft links from the lower control arms Tie rod ends from the steering knuckles Lower ball joints from the steering knuckles Cooler lines and bracket from the transaxle A/C compressor bolts and position compressor aside Axles from the transaxle and secure them to the steering knuckle/struts
   
6. Remove or disconnect the following:
   
   Intermediate shaft from the steering gear Frame bolts and make certain that an engine stand (such as J 39580) is aligned below the engine
   
   Fig. Use a engine stand to support the assembly during frame removal
   Engine to transaxle bolts and studs Engine flywheel to torque converter bolts Engine from the transaxle and place it on the engine stand
   

To install:

u have 2 bad coils

Seems like an idle speed control to me.

sounds like the idle air control motor is sticking , not sure what engine you have 3.4 litre ?? also you can ck the throttle plate right on top where the throttle cable bracket assembly part of that bracket holds down a vaccum line that has a rubber gromnet that after time leaks causing idle surge , hope this helps

Just replaced both front bearings on my 2000 olds silhouette, the traction control light / ABS light is still on. What do i do?