Cold Start Injector Repair Service Costs
Basic Cleaning and Testing
Labor: 1-1.5 hours ($125-187.50)
This service includes removal, basic cleaning, and testing of the cold start injector. Recommended for injectors with minor deposits and regular maintenance.
Complete Overhaul
Labor: 2-2.5 hours ($250-312.50)
Parts: $50-150 (depending on required components)
This service includes complete disassembly, thorough cleaning, replacement of O-rings and filters, and comprehensive testing. Recommended for injectors with significant carbon buildup or performance issues.
Replacement Service
Labor: 1.5-2 hours ($187.50-250)
Parts: $200-500 (depending on make and model)
This service includes removal of old injector and installation of a new unit. Recommended when the original injector is beyond repair or when seeking optimal performance.
Note: Prices may vary depending on vehicle make and model. Additional costs may apply if related components require service. All services include diagnostic testing to ensure proper operation.
Additional Services:
• Fuel system cleaning: $75-100
• Diagnostic testing: $125 (one hour)
• Emergency service: Additional $50 rush fee
Cold Start Injector Repair Procedures by Type
Mechanical Cold Start Injector
Common symptoms:Hard cold starts, rich fuel mixture when cold, leaking fuel
Repair procedure:
- Remove injector from cold start valve housing
- Disassemble injector carefully, noting component orientation
- Clean all metal components with appropriate fuel injector cleaner
- Inspect plunger and housing for scoring or wear
- Replace all O-rings and seals
- Test plunger movement and spring tension
- Reassemble with new seals
- Bench test for proper spray pattern and pressure
Thermo-Time Switch Cold Start Injector
Common symptoms:Inconsistent cold starting, no fuel delivery during cold start
Repair procedure:
- Test electrical resistance of heating element
- Remove injector assembly
- Clean injector nozzle and check for clogging
- Replace bi-metallic strip if damaged
- Replace heating element if resistance is out of spec
- Install new seals and gaskets
- Test timing function with 12V power supply
- Verify proper spray pattern before reinstallation
Electronic Cold Start Injector
Common symptoms:No cold start enrichment, check engine light, poor cold running
Repair procedure:
- Perform diagnostic scan for error codes
- Test injector resistance and voltage supply
- Remove injector from intake manifold
- Ultrasonic clean injector body and nozzle
- Flow test injector on specialized equipment
- Replace internal filters and O-rings
- Test spray pattern and atomization
- Verify proper electrical operation before reinstallation
Important Notes:
- Always use appropriate safety equipment and follow manufacturer guidelines
- Ensure work area is well-ventilated and free from ignition sources
- Document all resistance readings and flow rates for quality control
- Use only OEM or high-quality replacement parts
Note: These procedures should only be performed by qualified technicians with proper equipment and expertise. DIY repairs may void warranty and cause safety issues.
Understanding Cold Start Injectors
ACold Start Injectoris a specialized fuel injector designed to help an engine start more efficiently when it's cold. When an engine is cold, fuel doesn't vaporize as readily as it does when the engine is warm, making it harder to achieve the proper air-fuel mixture needed for combustion.
What Does a Cold Start Injector Do
The cold start injector serves several important functions:
- Extra Fuel Delivery:It provides additional fuel during cold starts when the engine needs a richer fuel mixture
- Improved Atomization:Helps break fuel into finer droplets for better combustion in cold conditions
- Faster Warm-Up:Assists in getting the engine up to operating temperature more quickly
- Emissions Control:Helps reduce emissions during the critical cold-start period
When Does It Operate
The cold start injector typically only operates when:
- The engine temperature is below a specific threshold (usually around 35°C/95°F)
- During the initial starting procedure
- For a brief period after startup until the engine reaches proper operating temperature
Note: Not all vehicles are equipped with cold start injectors, as modern fuel injection systems have largely eliminated the need for separate cold start injectors in many applications.
Common Cold Start Injector Failure Symptoms and Warning Signs
Cold Start Injector Failure Signs & Maintenance Guide
Bosch Cold Start Injector
Signs of Failure:
- Hard starting when engine is cold
- Excessive fuel smell during cold starts
- Rough idle during warm-up period
- White smoke from exhaust during cold starts
Service Schedule:
- Inspection every 30,000 miles
- Flow testing recommended at 60,000 miles
- Typical replacement interval: 80,000-100,000 miles
Nippondenso Cold Start Injector
Signs of Failure:
- Poor cold weather starting
- Stalling during warm-up
- Leaking fuel when engine is off
- Inconsistent spray pattern
Service Schedule:
- Visual inspection every 25,000 miles
- Cleaning recommended at 50,000 miles
- Replacement typically needed at 75,000-90,000 miles
Weber Cold Start Injector
Signs of Failure:
- Extended cranking time in cold weather
- Fuel pooling under vehicle
- Erratic idle when cold
- Failed emissions tests
Service Schedule:
- Basic inspection every 20,000 miles
- Cleaning and testing at 40,000 miles
- Typical replacement: 60,000-80,000 miles
Note: These are general guidelines. Actual service intervals may vary based on vehicle make, model, and operating conditions. Always consult your vehicle's service manual for specific maintenance schedules.
How It Works
- Get a quote online or set-up a time to have your vehicle looked at.
- Pick time slots that work for you, easily, online.
- We will confirm appointments and send reminders.
- Our mechanics bring everything that is needed to you.
- All you have to do is provided a safe area for the work to be performed.
What we need from you
- A safe place to work on your vehicle
- No working on the side of busy roads
- No working on unstable or steep surfaces.
- We do not perform repairs during severe weather.
- Authorization from a property owner or management.
- Repair work done in a parking lot or at your requires permission.
- We do not do repairs in areas restricted by law.
Common Questions
Service Area
Our primary service area is greater Grand Rapids and includes Comstock Park, East Grand Rapids, Grandville, Kentwood, Walker, and Wyoming
Our secondary service area is provided by our Belding location and includes: Belding, Greenville, Ionia and the sorrounding areas.
Contact us if you have any questions about where we provide services.
