07 hesitating at 45 to 60 Mph, misfire - TerrainForum.net: GMC Terrain Forum
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post #1 of 5 (permalink) Old 06-16-2017, 03:38 PM Thread Starter
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Question 07 hesitating at 45 to 60 Mph, misfire

my 2007 equinox keeps hesitating, jerking anywhere from 45-60 Mph after I drive about 20 mins. Got a cylinder 1 misfire code, change the coil pack but it's still doing it. RPM are jumping, using more gas and I can smell the exhaust whenever I'm idling .
About 2 yards old , had plugs & wiring changed out. Just hit 59,997 miles.
About a month ago after the hesitation started I put a can of seafoam in it but it only had a 1/4 of a tank of gas when I did it, drove it about 20-30 miles then put in more gas. I never let the ga below a half a tank, but I am finally at 1/4 now. ( in other words, I guess the sea foam has still been in the tank for a while since I keep adding gas )
Help me please

Last edited by SherriB; 06-16-2017 at 04:04 PM.
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post #2 of 5 (permalink) Old 06-16-2017, 04:12 PM Thread Starter
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My engie light is also on
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post #3 of 5 (permalink) Old 06-16-2017, 04:36 PM
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Just a guess, but you have a cracked exaust manifold. The crack can let air in, like a vacuum leak, and trigger a misfire code. I only suggest this from a problem with my old dodge and the fact that cracked manifolds are kind of common on the Nox.
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post #4 of 5 (permalink) Old 06-23-2017, 10:44 PM Thread Starter
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Is this a expensive part to fix? Will I mess it up worst driving it until I can get it fixed? And is it a hard part to fix ( like how some of the spark plugs are )
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post #5 of 5 (permalink) Old 06-24-2017, 12:50 PM
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Originally Posted by SherriB View Post
My engie light is also on

This is probably your best chance of diagnosing your problem.
Have an auto parts store, independent shop, or dealer check for a trouble code.
Good Luck

2014 Equinox LTZ FWD 3.6L. V-6 (LFX)
GM6T70 Transmission-Gen II(M7W)
Crystal Red Tintcoat-Brownstone Leather-(FE2) Suspension-18" Wheels
Build Date: Nov. 04, 2013-Delivery Date: Nov. 25, 2013
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