BStowers023 Posted October 6, 2014 Report Share Posted October 6, 2014 So my TL has been having some recent issues. The car has 118k miles. Issues -Idles rough but only in drive (sputters). Idles around 600-700 RPMs when normal is roughly 1k -ticking noise coming from head area. -Codes show misfire to all cylinders and random misfire. I was told this could be bad gas, But I dont think so .Could this be a valve issue? Possibly a valve adjustment may be needed? I don't think it's a spark issue since all of the coils andplugs are independent to 1 cylinder. Just looking to get some input before I take it to get an obnoxiously expensive diagnosis. Quote Link to comment Share on other sites More sharing options...
Green Bastard Posted October 6, 2014 Report Share Posted October 6, 2014 Whatever controls the spark timing (ie cas) could possibly be bad. Couldn't hurt to test it (if possible). Quote Link to comment Share on other sites More sharing options...
noobiemcnooberson. Posted October 7, 2014 Report Share Posted October 7, 2014 Mileage?original plugs? Quote Link to comment Share on other sites More sharing options...
Zach1647545520 Posted October 7, 2014 Report Share Posted October 7, 2014 1 bad coil could cause random misfire codes. I would check those first since they are they easiest. Quote Link to comment Share on other sites More sharing options...
Moe7 Posted October 7, 2014 Report Share Posted October 7, 2014 I'd bet on a bad coil pack Quote Link to comment Share on other sites More sharing options...
Steve R. Posted October 7, 2014 Report Share Posted October 7, 2014 Agreed, which head is this ticking noise coming from? I am assuming it is a 3.2, I've seen a couple of them have a spark plug back out of the head and tear the coil and plug itself up. Unplug each coil and see which one makes the least difference in how the car runs. Quote Link to comment Share on other sites More sharing options...
Geeesammy Posted October 7, 2014 Report Share Posted October 7, 2014 Power balance test, then if that doesn't yield any answers I'd check the valves and see if that are within specification Quote Link to comment Share on other sites More sharing options...
Brandon Posted October 7, 2014 Report Share Posted October 7, 2014 1 bad coil could cause random misfire codes. I would check those first since they are they easiest. This is exactly what happened to my TL as well. Had one bad coil which made the whole car shake and run pretty rough. Clear the codes and found that 3 cylinders consistently came up with random misfires. Started swapping coils among cylinders to try and isolate the bad one. Got it down to two cylinders after some swapping, bought one coil replaced the one I believed was bad. Fixed. Quote Link to comment Share on other sites More sharing options...
BStowers023 Posted October 7, 2014 Author Report Share Posted October 7, 2014 So it could be a spark issue even though each plug and coil are independent to one cylinder? This would cause a misfire to all cylinders if just one was bad? Quote Link to comment Share on other sites More sharing options...
Moe7 Posted October 7, 2014 Report Share Posted October 7, 2014 So it could be a spark issue even though each plug and coil are independent to one cylinder? This would cause a misfire to all cylinders if just one was bad? Yep, had the same issue with my CL at one point and got misfire codes (among others) to multiple cylinders.. Pulled plug off each coil pack until I found the one that had no effect and replaced. Quote Link to comment Share on other sites More sharing options...
BStowers023 Posted October 7, 2014 Author Report Share Posted October 7, 2014 Fixed it. One plug was all sorts of fucked up...replaced all of them while I was at it. Car runs sharp now! Quote Link to comment Share on other sites More sharing options...
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