What to Do If You Put Diesel in a Petrol Car in Cambridgeshire
- Misfuelled Car Fixer Cambridgeshire
- Mar 2
- 3 min read
0330 122 6640
Putting diesel in a petrol car is a mistake that happens more often than you might think. The consequences can be costly and stressful, especially if you’re not sure what to do next. If you find yourself in this situation in Cambridgeshire, acting quickly and correctly can save your vehicle from serious damage. This guide explains the steps to take, what to expect, and how professional help like Misfuelled Car Fixer Cambridgeshire can assist you.
Why Putting Diesel in a Petrol Car Is a Problem
Petrol and diesel engines operate differently. Petrol engines rely on spark plugs to ignite the fuel-air mixture, while diesel engines use compression ignition. Diesel fuel is thicker and oilier than petrol, and it doesn’t evaporate as easily. When diesel enters a petrol engine, it can cause:
Clogged fuel injectors and filters
Damage to spark plugs and ignition system
Engine misfires or failure to start
Potential damage to the catalytic converter
The longer you run the engine with the wrong fuel, the worse the damage becomes. Even a small amount of diesel in a petrol tank can cause problems.
Immediate Steps to Take If You Put Diesel in a Petrol Car
If you realize you have put diesel in your petrol car, follow these steps immediately:
Do not start the engine
Starting the engine circulates diesel through the fuel system, increasing the risk of damage.
Turn off the ignition and remove the key
This prevents accidental starting.
Call a professional service
Contact Misfuelled Car Fixer Cambridgeshire at 0330 122 6640 for expert advice and assistance.
Avoid driving the car
Even moving the vehicle can spread diesel through the engine.
How Professionals Fix a Misfuelled Petrol Car
When you call a specialist like Misfuelled Car Fixer Cambridgeshire, they will typically:
Drain the fuel tank completely
Removing all contaminated fuel is the first priority.
Flush the fuel system
This includes fuel lines, injectors, and filters to clear any diesel residue.
Check spark plugs and ignition components
These parts may need cleaning or replacement.
Test the engine
After cleaning, the engine is tested to ensure it runs smoothly.
This process usually takes a few hours but can save you from expensive repairs later.
Signs Your Petrol Car Has Diesel in the Tank
Sometimes you might not realize the mistake immediately. Watch for these signs:
Engine struggles to start or won’t start at all
Rough idling or stalling
Loss of power during acceleration
Unusual smoke from the exhaust
Warning lights on the dashboard
If you notice any of these symptoms after refueling, stop driving and seek help.
Preventing Misfuelling in Cambridgeshire
Avoiding this costly mistake is better than fixing it. Here are some tips:
Always double-check the fuel pump before filling
Look at the nozzle and the label on the pump.
Use familiar petrol stations
Stations you trust are less likely to have confusing pump layouts.
Pay attention to your car’s fuel type
Keep a note in your glove box or near the fuel cap.
Ask for help if unsure
Staff at petrol stations can assist if you’re uncertain.
What to Expect Cost-Wise
The cost of fixing a diesel misfuelled petrol car varies depending on:
Amount of diesel put in
Whether the engine was started
Extent of damage to fuel system components
On average, draining and cleaning can cost between £150 and £400. More severe damage requiring parts replacement can increase costs. Using a specialist like Misfuelled Car Fixer Cambridgeshire ensures the job is done right the first time, potentially saving money in the long run.
When to Consider Replacing Your Vehicle
In rare cases where diesel has caused severe engine damage, repairs might not be economical. Signs include:
Persistent engine problems after cleaning
Major mechanical failures
High repair estimates exceeding the car’s value
If this happens, consult a trusted mechanic or vehicle expert to explore options.
Why Choose Misfuelled Car Fixer Cambridgeshire
Residents of Cambridgeshire benefit from a local, experienced service that understands the specific needs of the area. Misfuelled Car Fixer Cambridgeshire offers:
Fast response times
Skilled technicians with specialist equipment
Transparent pricing and clear advice
Support throughout the repair process
Calling 0330 122 6640 connects you with experts who can guide you through the next steps calmly and efficiently.
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