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Discussion Starter #1
I had a check engine light tonight. It's P1506 If I remember correctly, it's written down and in my car. It said something about engine idle input? I noticed the car idles high a little bit right when I start it up. Any ideas of what this could be? Any info would be greatly appreciated. Thanks!
 

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305 Posts
Check for vacumn leaks or dirty or damaged IAC assembly or valve.
 

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14,126 Posts
Possible causes:

-- IAC circuit short to GND.

-- IAC valve assembly stuck open.

-- Vacuum leak.

-- Damaged IAC valve assembly.

-- Damaged throttle body.

-- Damaged PCM.

Key on, engine running.

With the engine at idle, listen for vacuum leaks.

Inspect the entire intake air system from the Mass Air Flow (MAF) sensor to the intake manifold for damage or leaks such as:

Cracked or punctured intake air tube.

Loose intake air tube at the air cleaner housing or throttle body.

IAC valve assembly or gasket seal.

Intake manifold assembly or gasket seal.

EGR valve gasket seal.

Vacuum supply connectors and hose.

PCV valve, connectors and hose.

Are any leaks detected in the above areas?


KE21 CHECK EVAP SYSTEM FOR A STUCK OPEN VALVE

Key off.

Disconnect hoses at EVAP Canister Purge Valve.

Connect a hand vacuum pump to the fuel vapor port to EVAP canister at the EVAP Canister Purge Valve.

Apply 53 kPa (16 in-Hg) of vacuum to EVAP Canister Purge Valve.


Does the EVAP Canister Purge Valve hold vacuum for 20 seconds?
 

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Discussion Starter #4
I was recently in an accident about a month ago and i just got my car back. There was a little black box about an inch deep by 4" by 4" that fell off my car, and I gave to the first repair shop and they didnt repair my car correctly. I do have water injection on the car also, it intakes air and water through the little box deal, could this be a possible leak? Any help would be appreciated.
 
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