Rough Idle - No Codes
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Author Topic: Rough Idle - No Codes  (Read 291 times)
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grp3dradis
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« on: July 05, 2017, 12:12:06 PM »

Hello All,

I am struggling to figure out what's going on with my 2005 Aztek FWD.  A while back it was running perfectly smooth, went to the grocery store and when I came out and started it - it started and stalled.  It cranked right up on the next attempt but from that point forward it has idled pretty rough and I'm fairly confident that roughness is at all RPMs just not as noticeable.  There are zero codes in the computer.

To date I have changed the oil (always use full synth), thoroughly cleaned the throttle body, swapped the intake and its sensors with that from one of my other Azteks which works flawlessly, tried injector cleaner (start with simple fixes, right?), and replaced the front 3 spark plugs & wires.  There are no oil or coolant leaks and the exhaust is perfectly clear.  Now, I realize it could very well be the back 3 - which I can't get to and I'm not that comfortable DIY rotating the engine forward as I've seen others do.  My next steps are to get those back 3 plugs swapped and replace the fuel filter.

Aside from the back plugs and fuel filter does anyone have any experience with this flavor of rough idle and if so have any suggestions?  Any and all advise is much appreciated!
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