Question about 2003 Pontiac Grand Am

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2003 grand am pontac need find where the motor vaccum is to find out why reves are high

Posted by Shirley Morrison on


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Bogdan Odwazny

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Posted on Apr 26, 2019


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Jeffrey Turcotte

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SOURCE: motor reves up high when started can not keep it

First check to make sure the throttle return springs are closing the throttle. If that's good, the problem is likely a bad idle air control valve/motor. Take the valve out and check for obstructions in the port that could keep the valve from closing. Then, if you have an ohmmeter, you can run these checks on the valve:

    IAC location:
    Remove IAC, check for obstructions in passage, run electrical testsjturcotte_551.gif
    1. Disengage the IAC electrical connector.
    2. Using an ohmmeter, measure the resistance between IAC terminals A and B . Next measure the resistance between terminals C and D .
    3. Verify that the resistance between both sets of IAC terminals is 20-80 ohms. If the resistance is not as specified, the IAC may be faulty.
    4. Measure the resistance between IAC terminals B and C . Next measure the resistance between terminals A and D .
    5. Verify that the resistance between both sets of IAC terminals is infinite. If the resistance is not infinite, the IAC may be faulty.
    6. Also, with a small mirror, inspect IAC air inlet passage and pintle for debris. Clean as necessary, as this can cause IAC malfunction.

Posted on Dec 19, 2010


Sudeep Chatterjee

  • 3267 Answers

SOURCE: need picks and location of

There are 4 bolts on the 2.4 Twin Cam cover on top of the engine. I believe they are 13mm. Remove them, and pull the cover up and off. Under there are the spark plugs. And you will see the ignition system connected as one with the cover.

There are no spark plug wires.
You'll find springs inside of insulator 'boots' when you get in there.

see this picsodeep_1.jpg

Posted on Jun 18, 2011

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