International SPN 5357 FMI 0: Fuel Injection Quantity Error
SPN 5357 FMI 0 (FMI 0) — Engine Fuel Injection Quantity Error for Multiple Cylinders - Data Valid But Above Normal Operational Range - Most Severe Level
Quick Answer
SPN 5357 FMI 0 means multiple cylinders on an International A26 are receiving more fuel than commanded. It's a High severity fault - check shared rail pressure before assuming individual injectors have failed.
Overview: International SPN 5357 FMI 0
ProfessionalDieselRepair.com treats multi-cylinder fuel quantity codes the same way we treat multi-cylinder misfire codes - look at what's shared across those cylinders before isolating down to any single injector.
Repair Snapshot
Time
2 - 6 Hours
Difficulty
Advanced
Parts Cost
$150 - $2,800
Dealer Labor
$900+
Tools Required
- OEM Diagnostic Software
- Fuel Pressure Gauge
- Diesel Laptops JPRO
- Snap-on NEXIQ USB-Link
What SPN 5357 FMI 0 Means
SPN 5357 FMI 0 on an International A26 means the ECM detects that multiple cylinders are receiving more fuel than commanded. This points to a shared fuel system issue rather than a single injector, and it typically causes rough running, excessive smoke, and reduced fuel economy.
Symptoms Drivers Notice
- Rough idle with a noticeable shake through the cab
- Excessive black or white smoke depending on which cylinders are over-fueling
- Reduced fuel economy despite normal driving habits
- Check engine light, sometimes with individual cylinder trim codes alongside it
Most Likely Root Causes
Fuel rail pressure running above commanded target
CommonA mechanical/hydraulic fault affecting the shared rail - excess pressure pushes more fuel through every injector on that circuit simultaneously.
Stuck-open fuel pressure regulator or relief valve
CommonA mechanical component failure that directly causes the rail overpressure driving multi-cylinder over-fueling.
Worn injectors on specific cylinders allowing excess flow
OccasionalA genuine mechanical wear issue isolated to particular injectors rather than a shared rail problem.
Fuel pressure sensor circuit fault causing incorrect ECM fueling commands
RareAn electrical/sensor issue where inaccurate pressure feedback causes the ECM to over-command fuel delivery.
Common Misdiagnoses (Don't Waste Parts)
Replacing multiple injectors before checking rail pressure against commanded target
Why it happens: Over-fueling feels like an injector-specific problem.
Do this instead: This is a parts-cannon approach for a multi-cylinder code - verify rail pressure and the regulator/relief valve first, since a shared hydraulic issue is a common and cheaper cause.
Assuming heavy smoke always means a turbo or air intake problem
Why it happens: Smoke is commonly associated with boost issues.
Do this instead: Check fuel delivery quantity data first when this specific code is present - it directly points to a fueling issue rather than an airflow problem.
Master Tech Commentary
Mechanic's Notes
ProfessionalDieselRepair.com note: check rail pressure against commanded target before pulling injectors on this one. An over-pressurized rail affecting multiple cylinders at once is a cheaper fix than a set of worn injectors and needs to be ruled out first.
Step-by-Step Diagnostic Procedure
- Step 1: Pull the full fault list with a scan tool to see which specific cylinders show fuel quantity errors alongside this multi-cylinder code.
- Step 2: Check fuel rail pressure in live data - pressure running above commanded target can cause multiple injectors to deliver more fuel than intended simultaneously.
- Step 3: Inspect for a stuck-open fuel pressure regulator or relief valve, since this affects fuel delivery to all cylinders on the shared rail.
- Step 4: Run individual injector flow or balance tests to see if the over-fueling clusters on specific cylinders or is spread evenly across the bank.
- Step 5: If pressure is confirmed normal but specific injectors are over-fueling, those individual injectors likely have worn internal components allowing excess fuel through.
Professional service / OEM-level scan tools are recommended before clearing this fault for good.
Live Data & Freeze-Frame Tips
Log fuel rail pressure against commanded pressure through an idle-to-load sweep. A rail that consistently runs above commanded target confirms a hydraulic overpressure issue rather than individual injector wear.
Safety Warnings
- Relieve fuel system pressure before disconnecting any high-pressure fitting.
- Keep an appropriate fire extinguisher nearby when servicing the fuel system.
When to Limp In vs Tow
Not usually necessary - the truck remains drivable, though expect rough running, excessive smoke, and poor fuel economy until the shared cause is identified and repaired.
Prevention Tips for Fleets & Owner-Operators
- Keep fuel filtration current to protect the pressure regulator and injectors from contamination-related wear.
- Address any early fuel pressure trend warnings before they progress to a hard fault.
- Use quality fuel to reduce injector wear over time.
Related Fault Codes
SPN 1322 FMI 31
Multiple cylinder misfire, a related symptom that can accompany or result from significant fuel over-delivery.
SPN 157 FMI 0
High fuel rail pressure, a common shared-system cause of a multi-cylinder over-fueling condition.
Frequently Asked Questions
Can I keep driving with SPN 5357 FMI 0 active?
Yes, generally, though expect rough running, smoke, and poor fuel economy. It's worth diagnosing soon since over-fueling can foul the aftertreatment system over time.
How do I reset this code without a scan tool?
A battery disconnect may clear it temporarily, but it returns on the next over-fueling event if the shared rail or regulator issue isn't fixed.
What triggers a derate from this code?
Severe or sustained over-fueling can trigger a protective power or fueling reduction to limit aftertreatment fouling and excess smoke.
Is this always an injector problem?
No - a stuck-open pressure regulator or relief valve affecting the shared rail is a common and cheaper cause than worn injectors.
How much does this typically cost to fix?
A regulator or relief valve repair runs $150-$600. If multiple injectors are confirmed worn, costs can climb toward $2,000-$2,800.
Why is my truck smoking so much with this code?
Over-fueling multiple cylinders means more raw fuel entering combustion than the engine can burn cleanly, producing excess smoke until the underlying pressure or injector issue is fixed.