Signed in as:
filler@godaddy.com
High-End Diagnostics When Other Shops Can’t Solve It
Find the Frequency. Fix the Cause.
Unwanted noise, vibration, or harshness in your vehicle isn’t just annoying, it’s a signal. Something’s out of balance, resonating, or failing. Though, chasing down the source takes more than a stethoscope and a guess. It takes real data, the right tools, and an understanding of how rotational force and frequencies behave in motion.
That’s where advanced NVH diagnostics comes in.
What NVH Diagnostics Identifies
- Engine-speed-dependent vibrations
- Vehicle-speed-dependent vibrations
- Floorboard or chassis thumping
- Whining, buzzing, or humming noises
- Misleading "exhaust leak" sounds
- Harmonic resonance through fuel or HVAC lines
- Cabin drone that changes with RPM or speed
How Testing Is Done
At Keeney Auto & Diesel, NVH issues are diagnosed using the same high-resolution equipment used for CAN network analysis and module programming combined with a suite of physical sensors, accelerometers, and frequency mapping tools:
📊 Equipment & Methods:
- Tri-axis accelerometers mounted on seat tracks, frames, and fuel lines
- Oscilloscope analysis of vibration events and frequency peaks
- IR rotation sensors with square wave output for component sync
- Chassis microphones and piezo sensors adapted to scope input
- Waveform matching with camshafts, coil-on-plug, or injectors
- Custom-built tooling for vibration-to-cause correlation
What Makes This Different?
This isn’t guesswork. Neither is it trial-and-error parts replacement.
NVH testing here includes:
- Live waveform captures tied to engine events
- Frequency correlations to identify exact sources down to a line, mount, or pump
- Root-cause validation using controlled tests and synchronized sensor feedback
From diagnosing a bent O2 sensor housing after road debris impact (they vibrate too)…
To tracing fuel line vibrations all the way back to a high-pressure pump’s internal spring...
NVH diagnostics are performed here with the same discipline and precision as any network dropout or module fault.
Common Questions
Why does my car sound like it has an exhaust leak, but doesn’t?
- Some vibrations resonate through metal lines and panels, mimicking exhaust noise. NVH diagnostics reveal the actual source.
Can you record and show me the problem?
- Yes. Scope captures and vibration traces are part of the process and always shared with clients.
Can other shops do this?
- Many shops lack the equipment & training to capture and interpret NVH waveform data. That’s why clients are often referred here after others run out of answers.
When to Book NVH Testing
- Vibrations no one can isolate
- Sounds that change with engine speed
- Sounds that change with vehicle speed
- Confirmed part failures with recurring symptoms
- Any case where “you can feel it” but no one can see it
Other Services
The Impending Experience
Vehicles are one of the single largest investments most individuals will ever make in their lifetime. Typically, they are second in magnitude, only to the purchase of a home. When something goes awry with your second largest investment, a litany of emotions and eleventh-hour schedule alterations are inevitable. The only thing that could possibly make the entire ordeal worse, is subsequently realizing that the auto mechanic shop you've chosen to restore your vehicle to its previous, operational state, is one that lacks all ability to communicate clearly, provide accurate timelines, and fix it appropriately the first time around. The disdain I have for this type of environment is unparalleled and I will always point it out in derision. While my operation is small-scale, the processes I have in place are designed to directly address the aforementioned deficiencies we've all experienced in these shops.
Not unrelated to these deficiencies, the service and repair industry is hamstrung by the "Unattainable Triangle". When a shop fails the customer expectation, it is virtually always a result of delivering one of the fast sides of the triangle. I relay this information to shed light on the detriments of expeditious repairs. Here, in this business, speed is inconsequential. Automotive repairs made in haste are invariably inferior, whether you know it or not.