Can a trouble code be assigned to an IAC valve?
Diagnosing problems associated with the IAC aren’t simple. There are many other causes that can make a IAC valve appear faulty. In many cases, there may only one or two trouble codes in the ECM/PCM assigned to the IAC, but these trouble codes can set for a variety of reasons.
What causes the vacuum level to drop at idle?
Engines that have higher compression or are new/rebuilt can have higher internal loads/friction which can also result in a drop of idle vacuum levels. Basically any condition that increases load on the engine will result in the vacuum level to drop at idle, which will require the IAC or throttle blade to be opened up to compensate.
What is the trouble code for cylinder 3?
All our repairs are backed by our 12-month / 12,000-mile warranty. P0303 is a generic diagnostic trouble code (DTC) indicating an issue with the firing of cylinder 3. This code may be seen with other misfire codes as well as lean / rich condition codes. The P0303 DTC is set when the ECU detects multiple misfires from cylinder 3.
What does it mean when a response is sent on an idle connection?
This is similar to 401 but authentication is needed to be done by a proxy. This response is sent on an idle connection by some servers, even without any previous request by the client. It means that the server would like to shut down this unused connection.
Is the idle on my LWB I6 misfiring?
The idle was 100x smoother in the parking lot, took it for a spin around the block, and it’s back to it’s punchy (for a LWB I6) self again. In the morning, I will be checking/replacing the other 5 plugs.
What causes a P0300 to misfire at idle?
Looks like the 2nd drive cycle is when it throws it’s codes. Let it idle for a minute, and it kicked back a P0300, random misfire. After saying a few choice words, I took a walk and picked up 6 new plugs and the socket, best case scenario, I’ll have some spare plugs and a coil pack for down the road.
What’s the problem with my rough idle car?
May be a bad plug, may be a water problem, but probably a bad coil. Picked up a coil on the way home and got it changed out. Seems fine in the parking lot, will probably take it for a spin around the block after dinner just for peace of mind.
Engines that have higher compression or are new/rebuilt can have higher internal loads/friction which can also result in a drop of idle vacuum levels. Basically any condition that increases load on the engine will result in the vacuum level to drop at idle, which will require the IAC or throttle blade to be opened up to compensate.