Federal Probe Examines Whether Ford Godzilla V8 Can Suddenly Lose Power

Federal regulators are examining allegations that Ford’s 7.3-liter “Godzilla” V8 can suffer internal engine damage and suddenly lose power while a vehicle is being driven. The National Highway Traffic Safety Administration’s Office of Defects Investigation opened defect petition DP26011 after receiving a complaint on June 13, 2026.

The petition alleges that inadequate oil lubrication at low idle causes severe wear to the engine’s lifter rollers and camshaft lobes. It further claims Ford knew the root cause, released a software calibration that raises idle speed to approximately 1,000 rpm to improve lubrication, and did not notify owners or conduct a safety recall. NHTSA is investigating those claims; it has not confirmed a defect or ordered a recall.

What the investigation covers

The federal probe covers approximately 54,787 vehicles: the 2021 and 2022 Ford E-350, along with the 2021 F-59 and F-750. All use the 7.3-liter gasoline V8. The same engine family is also installed in other Ford trucks and motorhomes, but the announced investigation does not establish that every application is included or affected.

Only one incident was identified in the agency’s initial summary, according to the published account of the investigation. No crashes, fires, injuries or fatalities were reported there. The nearly 55,000-vehicle scope describes the population regulators are examining, not the number of engines known to have failed.

The open questions are therefore substantial: whether the reported damage follows a repeatable pattern, which production configurations could be susceptible, whether operating conditions affect the risk and whether the alleged failure presents a safety defect requiring owner notification or corrective action.

Why low-idle lubrication is central to the allegation

The valvetrain converts camshaft rotation into the precisely timed opening and closing of the engine’s valves. In this engine architecture, lifter rollers follow the camshaft lobes. Those loaded contact surfaces depend on an adequate oil film to limit friction, heat and material wear.

The petition’s proposed failure mechanism begins at low idle, when it alleges that lubrication becomes insufficient. Progressive damage to a roller or cam lobe could then alter valve motion and spread wear debris through the oil system. If the damage advances far enough to stop the engine from producing power, the immediate safety concern is not merely the cost of internal repairs but the loss of propulsion while the vehicle is moving.

Regulators still must determine whether inadequate low-idle lubrication actually caused the reported incident and whether the condition exists across the covered population. A single complaint can justify technical review, but it cannot establish the frequency, common cause or production scope of a suspected problem.

The alleged calibration raises another question

Raising idle speed to roughly 1,000 rpm could increase oil-pump speed and circulation, which is consistent with the petition’s lubrication theory. A calibration change would also be a comparatively low-disruption response because it alters engine control rather than requiring immediate internal mechanical work.

That approach carries operating tradeoffs. A higher idle can increase fuel consumption, noise and heat generation during stationary operation. Those effects may be especially relevant in commercial chassis, motorhomes and other vehicles that can spend meaningful time idling. The available information does not identify the calibration, show which vehicles received it or establish that Ford issued it specifically to address camshaft and lifter wear.

Ford’s response to the petition was not included in the available account. The petition says owners were neither told about the alleged issue nor covered by a recall, leaving NHTSA to assess both the proposed mechanical mechanism and the claim that a software response already existed. The agency’s next decision will determine whether the matter advances beyond petition review, closes without further action or develops into a broader defect investigation that could require Ford to identify affected vehicles and explain the calibration’s purpose.

By Robert McKinney — Editor-in-Chief for AMI’s automotive and mobility coverage, with a mechanical engineering background and a decade reporting on powertrain systems, EV innovation, and global vehicle manufacturing.