Trailblazer vibration at idle, Only reaches temp while driving and then Aug 12, 2007 · So I've had this vibration at idle for quite a while. Dec 14, 2023 · Just a couple months ago I noticed that while idling I can feel vibrations through the steering wheel, brake pedal and shift knob. If your Trailblazer isn’t getting a good spark it will shake as it misfires and tries to stay running. It smoothes out as soon as I bring the rev's up. Inspect motor mounts for cracks or looseness, as they dampen engine vibrations. That goes up and down when the AC compressor kicks on, and can send the idle down to 300-400 RPM and stall the engine out. The ignition system is responsible for burning the air-fuel mixture that enters the combustion chamber. Not an erratic idle like a dirty throttle body gives you. When I give it some gas, the vibration slightly increases until it goes away around 30 mph and then comes back as I slow down or stop again. It has started a vibration that can be felt in the steering wheel when vehicle is not in motion. Symptoms: Vibration felt thru steering wheel, gas pedal & body w/low resonate sound at idle. I had a mechanic check transmission mounts Mar 24, 2010 · Engine vibration and rough idle Jump to Latest 49K views 19 replies 11 participants last post by jpark Apr 3, 2021 J May 15, 2007 · My truck has developed a bad vibration at idle over the last month or so. In fact, the thing even stalled a couple of times. When the coil was removed, the boot was found to have numerous cracks and was in generally poor condition. I have replaced engine mounts OEM with anchor brand hydraulic mounts and wonder if they were really solid mounts with no change in vibration. I've already done the fan Oct 10, 2008 · My grandma's 2002 Chevy Trailblazer LTZ 2wd 4. All points to the motor mounts but they don't look horrible and they don't have a lot of play when going from reverse to drive and back. Why is my Trailblazer running rough at idle? The most common reasons a Chevrolet Trailblazer has rough idle are a vacuum leak, an issue with the spark plugs, or a problem with the ignition coil. Here are the main components of the ignition s Jan 30, 2025 · Let’s embark on a journey to understand the potential causes behind this unsettling vibration, unraveling the mystery of why your Chevy Trailblazer might be shaking while patiently waiting at a stoplight. Feb 4, 2010 · Need advice/opinions: 125,000 miles. 2L. 2L can stem from worn motor mounts or engine misfires. Constant vibration at idle and while driving in a Trailblazer 4. It's so bad that it rattles the grill back-and-forth and anything not tightened down on or in the truck. I took it in last month and the GMC dealer said it May 9, 2010 · Lots of discussion in a few threads about a nasty and annoying vibration in idle, but only in gear. 2L I6 has a bad vibration in drive when stopped. It is present in park or neutral, but is worse in gear. You’ll likely get a misfire code, such as P0300 or P030X (X being the misfiring cylinder number. Oct 26, 2022 · Repeated, prolonged exposures to moisture had caused the coil's boot to deteriorate to a point where water was beginning to intrude and cause a misfire which eventually fouled the plug. Apr 14, 2025 · Some Chevrolet Trailblazer owners report experiencing rough idle and severe vibration when stopped in drive, which may be attributed to several factors. Then it Dec 10, 2016 · I have a 2004 Chevy Trailblazer 2WD LS with a 4. Goes away in neutral or drive. Check spark plugs, ignition coils, and fuel injectors for proper function to rule out misfires. Temp takes 5 min to reach near 210. The motor runs perfect, I'm. It's especially bad with the A/C on. (not smooth & quiet like it should be) Feels labored sometimes during acceleration. These owners often suspect issues with motor mounts, as the symptoms are consistent with potential motor mount failures. Roadie and I were off-road a month or so ago and we opened the hoods and you could see my engine shake, while Roadie's was smooth as can be.


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