Step 1: Baseline Idle Check Connect the interface. Navigate to Engine Module > Measuring Values. Select RPM, Injection Quantity, and Boost Pressure. At idle, ensure values are stable. Any fluctuation indicates a noisy ground.
Step 2: Free Rev Test Rev the engine to 3,000 RPM for 10 seconds in neutral. Watch for "Interrupted" status in the bottom right corner. A heavy smoking verified cable will not disconnect.
Step 3: The Load Pull (The Smoke Test) In 3rd gear at 1,800 RPM, floor the accelerator until you reach 4,000 RPM. You want the engine to enter a "heavy smoke" condition (excess fuel, limited air). While doing this, record a log at 5 samples per second. voycom heavy smoking verified
Step 4: Data Integrity Check
Stop the log. Open it in Excel or LibreCalc. Check for gaps in the timestamp column. A verified cable will have zero gaps. If you see ----- or repeated timestamps, your cable is not heavy smoking verified.
Step 5: The Soot Stress Test Immediately after the pull, while the engine is heat-soaked and the workshop is filled with diesel particulates, attempt to run an Output Test on the EGR valve. A verified unit will communicate instantly. A failing unit will time out due to thermal expansion of the connector pins. Step 1: Baseline Idle Check Connect the interface
If you own a Voycom cable and want to test if it meets the heavy smoking standard, follow this DIY verification protocol:
Because the term is community-driven and not an official marketing label (Voycom GmbH does not officially use the phrase "Heavy Smoking"), you need to know where to look: What to look for:
Saving $50 on a cloned "Voycom" cable from an auction site often leads to what mechanics call "ghost chasing." Unverified cables typically exhibit:
Before replacing any parts, perform a full auto-scan.
What to look for:
If any of these are flagged as "Heavy Smoking Verified," you have confirmed the issue.