The Ford 7.3L gas engine, often referred to as the “Godzilla” engine, is praised for its raw power and simplicity. But even this high-performance motor isn’t without its flaws. If you own a Ford truck, van, or SUV equipped with a 7.3L gas engine and are dealing with frustrating performance issues, you’re not alone. From wiring harness failures to cylinder scoring, many drivers throughout California have reported ongoing reliability concerns.
In this guide, Lemon Lawyers LA—your trusted Southern California lemon law firm based in Glendale—breaks down the five most common Ford 7.3 gas engine problems, how to fix them, and how we can help if your vehicle qualifies as a lemon. Call us for a free consultation at (866) 486-9227.
Problem #1: Wiring Harness Failures
A faulty wiring harness in your Ford 7.3 engine can lead to a domino effect of electrical issues and poor engine performance. This component connects essential systems and helps manage the engine’s electrical signals.
Common signs:
- Engine misfires
- Unresponsive sensors
- Intermittent power loss
- Dashboard warning lights
Fix: If you suspect wiring harness problems, a full inspection by a certified technician is essential. Damaged wiring must be replaced to restore engine integrity and performance.
Problem #2: Transmission Issues
The 7.3L engine often pairs with a 10-speed TorqShift transmission, which has developed a reputation for rough shifting and delayed gear engagement.
Common symptoms:
- Harsh or delayed shifts
- Trouble accelerating
- Transmission warning light
Fix: Software updates, fluid changes, and, in some cases, full transmission replacement may be necessary. If your vehicle is repeatedly in the shop for this issue, it may be time to explore your lemon law rights.
Problem #3: Cylinder Scoring
Cylinder scoring occurs when internal engine components—particularly the cylinder walls—become scratched or worn. It’s a serious issue that can significantly reduce engine efficiency and lifespan.
Symptoms include:
- Knocking sounds
- Oil consumption increase
- Blue exhaust smoke
- Reduced power
Fix: Depending on severity, repairs can involve cylinder honing or a full engine rebuild. Early detection is key to preventing long-term damage.
Problem #4: Starting Problems
Many Ford owners with 7.3L gas engines report hard starting, rough idling, or failure to start altogether. This can stem from issues within the fuel or ignition systems.
Watch for:
- Slow or no crank
- Stalling after starting
- Inconsistent idle
- Frequent jump starts
Fix: Common solutions include replacing spark plugs, fuel filters, ignition coils, or the battery. If these fixes don’t resolve the issue, you may be dealing with a defect.
Problem #5: Poor Gas Mileage
One of the most frustrating complaints is terrible fuel economy—a known drawback of the power-focused 7.3L gas engine.
Typical signs:
- Frequent fill-ups
- MPG drops despite normal driving
- Check engine light triggered by O2 or fuel trim codes
Fix: Improving fuel efficiency often involves routine maintenance: change spark plugs, clean fuel injectors, replace air filters, and maintain tire pressure. For many, though, efficiency never reaches acceptable levels.
Ford 7.3L Gas Engine Recalls: Are You Affected?
There have been several recalls related to vehicles equipped with the Ford 7.3L gas engine, though not always specific to the engine block itself:
- 2021 Ford E-Series (NHTSA 20V788): Engine cover insulation may lead to overheating and fire risk.
- 2016-2017 Ford Flex, MKT, Explorer (NHTSA 16V925000): Turbo oil supply tube defects could result in fires.
- 2022 Ford F-150 (NHTSA 22V484): Cooling system issues that could lead to engine overheating.
Ford owners should contact their local dealership to check for open recalls using their VIN. But even if your vehicle isn’t under recall, repeated engine issues may qualify for a lemon law claim.
Who Pays for Ford 7.3 Gas Engine Repairs?
1. Under Warranty
If your Ford is still covered under the manufacturer’s warranty, repairs should be performed at no cost to you. But if your vehicle remains unreliable despite multiple repair attempts, you may have a valid lemon law case.
2. Out of Warranty
For vehicles no longer under warranty, Ford may still offer goodwill repairs or partial coverage. Always document service visits and repair invoices.
Why You Should Call a Lemon Law Attorney
If you’re tired of visiting the dealership with no long-term fix in sight, it may be time to speak with a lemon law attorney. At Lemon Lawyers LA, we’ve helped countless drivers throughout Southern California hold manufacturers accountable.
We offer:
- Free consultations
- No fees unless we win your case
- Legal support for repairs, refunds, or replacement vehicles
Don’t settle for an unreliable Ford. Call us at (866) 486-9227 or visit LemonLawyers-la.com to learn more.