Find the actual fault before anyone buys a part.
Diesel & Gas Diagnostics
A check-engine light is a starting point, not an answer. We pull every module on the truck — engine, transmission, body, ABS, aftertreatment — read stored and pending codes, then verify with live data, freeze-frame and pinpoint testing before we quote a repair.
Diagnostics are billed at our flat hourly rate and the time is credited toward the repair when you have us do the work. You get the fault, the evidence and the estimate in writing.
What's included
Scope of work
- Full-module code scan with stored, pending and history codes
- Live data logging under load and on a road test
- Injector buzz/balance and contribution testing
- Fuel supply and return pressure testing
- Compression and cylinder-cutout testing
- Electrical draw, voltage-drop and grounding tests
- Smoke testing for boost, vacuum and EVAP leaks
- Written findings with photos and a repair estimate
Symptoms we fix
Sound familiar?
- Check engine, wrench or glow-plug light on
- Hard start, long crank or no start
- Rough idle, misfire or surging
- Loss of power or reduced-engine-power mode
- Excessive white, black or blue smoke
- Unexplained fuel-economy drop
How we work it
The four steps, every time
- 01
Intake
We log your complaint in your words — when it happens, how often, hot or cold, loaded or empty.
- 02
Verify
We reproduce the fault ourselves. Nothing gets diagnosed off a code alone.
- 03
Test
Pinpoint testing isolates the failed component instead of replacing parts by guess.
- 04
Report
You get photos, measured values and a line-item estimate before any repair starts.
Questions
Straight answers
Do you charge for diagnostics?
Yes — diagnostic time is real technician time. It is billed at the hourly rate and credited toward the repair if we perform the work.
My other shop already replaced parts. Will you start over?
We start with verification. If a previously installed part is good, we say so and move on rather than repeating the same guess.
Can you diagnose a truck that was towed in?
Yes. Free local towing is included with major repairs.
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Get a straight answer on your truck.
Tell us what it's doing. We'll tell you what it takes — in writing, before any work starts.