Question about 2001 Chevrolet Impala

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Does a 2001 chevy impala have a throttle screw and how to change the idle

I was wondering if my 2001 impala has a throttle screw and how i can turn my throttle up cause my car idles to low

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The idle is taken care of by the engine management computer using what is called the Idle Air Solenoid (IAS). The throttle plate on a fuel injected engine closes completely. There is an internally cast port in the throttle body allowing bypass air to flow around the throttle and into the intake manifold. The amount of air that flows through this passage is controlled by the IAS. The IAS has a servo-motor controlled pintle or valve that opens or restricts the airflow to maintain the correct idle RPM. This can be seen or felt when the engine is idling with the A/C running. When the compressor kicks on, the IAS opens up a bit to allow more air flow and compensate for the load of the compressor. What happens over time is the internal port gets clogged with deposits reducing the airflow and causing the engine to idle slower. Many times the deposits clog the end of the IAS pintle and causes what you're experiencing. If you've never cleaned the throttle body, now would be the time to get that done. It may turn out that the IAS itself has gone bad and needs to be replaced. This isn't a complicated job and will probably run about $150 or so to have done ...figure about $200 for a new IAS and a throttle body cleaning.

Posted on Apr 13, 2014

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No, the engine computer controls idle speed through the idle control valve on the throttle body assembly. Take it off and clean it and check operation with the electrical connector attached. When the key is turned to on, the pintle on the valve should have a noticeable movement, not a lot, but it should move a little.
Often the passages where the idle control valve mounts gets full of gunk (coking deposits) that inhibit good air flow through it. Clean it out and clean up the control valve if it is dirty.

Posted on Apr 13, 2014

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Posted on Jan 02, 2017

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SOURCE: idle at 1500 to 2000 rpm

Most likely the throttle body gasket (between the throttle body and the intake manifold) is leaking.

Posted on Feb 12, 2009

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SOURCE: 2001 Chevy Impala won't start

If the battery has gone dead, it could cause the security system to go into full lock-up mode. If it has locked up the accessories will work after the battery is charged back up , but the power to the starter will be cut off and it wont turn over. You need to do the 30 minute learn procedure. A GM dealer will print it out for you and you can do it yourself. It's very simple if you follow the procedure exact. hope this helps and good luck.

Posted on Mar 25, 2009

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SOURCE: Reset my engine oil low in 2007 chevy impala

it will say in your owners manual but i believe you turn your ignition key to the run position not the start. and pump the gas pedal 3 times with in 5 seconds

Posted on Apr 14, 2009

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Here are some of the causes of surges, stalls at stops, slow idle speed, erratic idle speed, rough idle and engine hesitation (and other problems), it is in most cases the idle speed control air-bypass valve and or throttle valve and upper intake, these area's get full of gunk and combustion residue over the miles and cause idle issues (stalls, low idle) like yours, Get a can of intake cleaner from any local parts store, not carb spray, intake cleaner, it is made by a company called CRC, remove the air intake hose to the engine, hold the idle high so the engine won't stall, then spray the can of cleaner into the intake while keeping the engine running, use at least 1/2 the can, shut down the engine and disconnect the battery for 5 minutes, then restart and complete a number of mixed driving cycles, town, freeway, stop and go etc., after a few days the problem will go away as the system will relearn to the clean intake.

Posted on Apr 14, 2009

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SOURCE: Need to find Low Pressure A?C Port 2001 Impala 3.8

The low pressure port is against the fire wall, look straight back and you will see it.

Posted on Aug 02, 2009

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Location of idle control air valve on 2001 chevy impala

The only thing close to what you are asking would be the adjustment to the main throttle blade before the intake manifold. However with today's cars that is not the only way to fix the to have a mechanic do it.

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Did you check for a vac leak ?
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Idle issues with 96 Chevy cavalier 2.2L OHV. everytime i try to adjust RPM's i get idle too high code. after doing research found that stop screw on throttle is factory set and should not be messed with,...


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I got code p2176 I changed out the tps still got same problem did not have this problem with other engine just changed engine out now cant seem to get this code off causing the car to rough idle and low...

P2176=Throttle Actuator Control System - Idle Position Not Learned
Did you use all you old sensors,or is some of them from the new engine,I would swap out the IAC sensor or check for wires not hooked up.
If it can't relearn to idle the Idle air control might be different then your old one,but its not registering with the computer

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