Question about 2003 Ford Mustang

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When I crank my car it idles up to 2 and stays there no matter what. Like it's idle too high. I changed the air flow censor, air filter and I still have the same problem. Wat else could it be?

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High idles are usually caused by a vacuum leak due to a cracked vacuum line,intake hose or gasket. You should inspect every hose that is attached to the manifold and check the condition as well as the connections. Also, are there any trouble codes stored in the pcm (COMPUTER) memory or an engine light is on?

Posted on Nov 08, 2010

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Gonna go out on the big limb,try replacing the idle control sensor.does it not want to start sometimes?then does and acts crazy? dies when you put it into gear? or jumps at redlights when holding the brake and it WANTS to go? suggest,idle control sensor,cost?$20.00 about labor? 2 screws on top of motor (phillips screws and 1 electrical plug in,) it's very easy to do and most garages will even coax you through the replacement!

Posted on Apr 09, 2011

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My car Chery QQ 0.8 rpm go from 1000 rpm to 3000 rpm and stays there


Most likely the fuel filter is contained in the fuel sender assembly inside the fuel tank.

Check again on your diagnostic report. The error code P0505 is the idle air. If the characteristics of the current problem was resolved by the replacement of the idle air control valve I would assume that either the connection is not reliable or the new unit has also become defective.

From your description of the problem you had changed the idle air control valve and the problem was corrected for a while. The error code indicates that the problem has reoccurred. Check the warranty on the replacement part and return for replacement. It is likely the replacement has failed.
P0505 code is an indication that your iac control motor is defective
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9 times out of 10 your problem is going to to be with the MAF Sensor. You changed it, was the old one bad? If not try putting the old one back in. If you bought an aftermarket MAF and didn't replace with an OEM MAF, that could also be your problem. Recheck to make sure it's seated correctly, check the wire connection.
Unless the stickers have been removed, you should have a vacuum line diagram under your hood.
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Ildleing up and down and running high on the rpms


I had a simular problem on my car, but it is'nt a Pontiac, it's an Mazda 323. I solved the problem to be that the Idle air control valve was dirty, and therefore sticking. This caused the engine to idle eratically and sometimes stall. Sometimes it would even stall whilst changing gear.
On most cars the idle air valve is located at the top of the engine, normally near the air filter. And to be honest is very easy to service. It's just a matter of disconnecting and cleaning it with carburetter cleaner.
You probably know this already lol, I'm not sure if you mean this when you say sensor. Hope this was of some help! :)

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