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<blockquote data-quote="Andersg" data-source="post: 22297" data-attributes="member: 8018"><p>Great timing.&nbsp; No pun intended.&nbsp; So the surging was only happening at a very warm engine, driven at least 15 minutes before the symptoms reappeared.&nbsp; Noticed one thing that i did not mention previously, there was a strong fuel smell that was subtle but not normal.&nbsp; Looked at what felt like 100 forums for equinox, terrains, malibus, etc. - anything with a 2.4L&nbsp; There was not consensus on this issue but there was a consistency.&nbsp; Cam Actuators and VVT solenoids were often the issue.&nbsp; I replaced my VVT solenoids going from an off brand to AC Delco OEM and what a difference it made!&nbsp; The off brand are just not capable of the sensitivity needed for this engine.&nbsp; Did this yesterday evening and drove aggressively for 50 miles doing the last 15 in stop and go traffic lights without issue.&nbsp; 95% confident this fixed the issue.&nbsp; Never did get any codes.&nbsp; I did 2 other things as precautions since i was there already - took the throttle body off and checked intake for oil pooling or other blowback issues - nothing of significance.&nbsp; Also replaced the air filter housing screws that had all stripped out.&nbsp; Just went to number 10 screws that self tapped into the plastic in case i was getting a vacuum leak at idle via vibration or similar issue. I may go to the next level and JB weld some nuts on the base filter housing so a threaded screw can go in and it is not relying on holding the plastic in the threads.&nbsp; In the end it appears to be addressed.&nbsp; Will update after a week of driving.&nbsp; Hope this helps!</p></blockquote><p></p>

[QUOTE="Andersg, post: 22297, member: 8018"] Great timing. No pun intended. So the surging was only happening at a very warm engine, driven at least 15 minutes before the symptoms reappeared. Noticed one thing that i did not mention previously, there was a strong fuel smell that was subtle but not normal. Looked at what felt like 100 forums for equinox, terrains, malibus, etc. - anything with a 2.4L There was not consensus on this issue but there was a consistency. Cam Actuators and VVT solenoids were often the issue. I replaced my VVT solenoids going from an off brand to AC Delco OEM and what a difference it made! The off brand are just not capable of the sensitivity needed for this engine. Did this yesterday evening and drove aggressively for 50 miles doing the last 15 in stop and go traffic lights without issue. 95% confident this fixed the issue. Never did get any codes. I did 2 other things as precautions since i was there already - took the throttle body off and checked intake for oil pooling or other blowback issues - nothing of significance. Also replaced the air filter housing screws that had all stripped out. Just went to number 10 screws that self tapped into the plastic in case i was getting a vacuum leak at idle via vibration or similar issue. I may go to the next level and JB weld some nuts on the base filter housing so a threaded screw can go in and it is not relying on holding the plastic in the threads. In the end it appears to be addressed. Will update after a week of driving. Hope this helps! [/QUOTE]

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