Engine Diagnostics & Performance Testing

Pinpoint issues fast and get your rig back to work the same day.

Engine diagnostics is where every repair at Innovative Truck Services starts. Our diesel techs hook into your ECM, road test the truck, and chase down performance, emissions, or drivability issues before they turn into roadside breakdowns. Accurate diagnostics saves time, money, and protects uptime for owner-operators and fleets alike.

Schedule Diagnostic

What's Included

Full ECM/fault-code scan paired with technician interview and road test.
Live data capture for fuel, boost, timing, temperatures, and regen activity.
Smoke, pressure, or cylinder contribution testing to verify mechanical health.
Aftertreatment system evaluation, including DPF/DEF efficiency checks.
Written repair roadmap with prioritized fixes and maintenance recommendations.

Benefits

Stops warning lights from turning into tow bills or missed deliveries.
Restores lost power, fuel economy, and cold-start performance.
Eliminates guesswork by confirming the root cause before parts are ordered.
Keeps emissions components compliant and reduces risk of DOT citations.
Provides clear documentation for fleet managers, warranty claims, and drivers.

Ideal For

Owner-operators experiencing sudden power loss, derates, or rough idle.
Fleet managers needing same-day answers on check-engine lights.
Trucks that recently failed a regen or opacity/emissions test.
Units returning from another shop with unresolved drivability complaints.
Seasonal equipment coming out of storage that needs a systems health check.

Steps

How It Works

Intake & Fault Scan

We interview the driver, connect diagnostic tooling, and pull fault history along with freeze-frame data.

Live Data Road Test

A technician drives the truck under load, monitoring boost, fuel trims, temperatures, and regen status in real time.

Component Verification

We run targeted tests - smoke, pressure, electrical, or cylinder balance - to confirm the root cause and rule out secondary issues.

Repair Plan & Next Steps

You receive a prioritized repair plan, timeline expectations, and maintenance notes so you can approve work with confidence.

Shop Snapshot

What we're seeing in the bay

Carbon buildup caught during a diagnostics pull — confirming airflow and EGR issues before parts get ordered.

Common Questions

Engine Diagnostics FAQ

How long does a diesel engine diagnostic take?

Most diesel engine diagnostics take 1-2 hours depending on the complexity of the issue. Simple fault code scans are quick, but thorough diagnostics including road tests and component verification may take longer. We prioritize accuracy over speed to ensure we identify the root cause.

What diagnostic equipment do you use?

We use professional-grade diagnostic tools including OEM-level scan tools for Cummins, Detroit, Paccar, and Volvo engines. Our equipment captures live data streams, freeze-frame information, and performs bi-directional testing for accurate troubleshooting.

Can you diagnose intermittent engine problems?

Yes. Intermittent issues are our specialty. We review fault history, capture live data during road tests, and use extended monitoring when needed to catch problems that don't show up during static testing.

Do you clear fault codes after diagnostics?

We clear codes only after the underlying issue is repaired or verified as resolved. Simply clearing codes without fixing the problem can mask serious issues and lead to more expensive repairs down the road.

Serving commercial fleets and owner-operators throughout Allentown, Bethlehem, Easton, and the greater Lehigh Valley.