What to Do If You Put Petrol in a Diesel Car in Cambridgeshire
- Misfuelled Car Fixer Cambridgeshire
- Feb 15
- 3 min read
Updated: Mar 2
24/7 Hotline : 0330 122 6640
Putting petrol in a diesel car is a mistake that happens more often than you might think. It can cause serious damage to your vehicle and lead to costly repairs if not handled quickly and correctly. If you find yourself in this situation anywhere in Cambridgeshire, including Cambridge, St Ives, March, Cambourne, or Huntingdon, knowing the right steps to take can save you time, money, and stress. This guide explains what to do immediately after misfuelling, how to avoid further damage, and where to get professional help in Cambridgeshire.
Why Putting Petrol in a Diesel Car Is a Problem
Diesel engines and petrol engines work differently. Diesel fuel lubricates the engine’s fuel system, while petrol acts as a solvent and can damage the components designed for diesel. When petrol enters a diesel engine, it can cause:
Damage to fuel injectors and fuel pump due to lack of lubrication
Engine knocking and misfiring
Reduced engine performance
Potential engine failure if the car is driven
The severity depends on how much petrol was added and whether the engine was started after misfuelling.
Immediate Steps to Take After Putting Petrol in a Diesel Car
If you realise you have put petrol in your diesel car, act quickly. Here’s what to do:
1. Do Not Start the Engine
Starting the engine circulates petrol through the diesel fuel system, increasing the risk of damage. If you have not started the car yet, do not turn the ignition on.
2. Turn Off the Engine If It’s Running
If you started the engine by mistake, turn it off immediately. The less the petrol circulates, the less damage it will cause.
3. Call for Professional Help
Contact a specialist who can safely drain and clean your fuel system. In Cambridgeshire, you can call 0330 122 6640 for expert assistance. They serve Cambridge, St Ives, March, Cambourne, Huntingdon, and surrounding areas.
4. Do Not Attempt to Drive the Car
Driving the car can cause petrol to spread through the fuel system and engine, leading to more extensive damage and higher repair costs.
How Professionals Fix Petrol in Diesel Cars
When you call a professional misfuelling service, they will typically:
Drain the contaminated fuel from the tank completely
Flush the fuel lines and filters to remove petrol residues
Check the fuel pump and injectors for damage
Refill the tank with the correct diesel fuel
This process ensures your car is safe to drive again and prevents long-term engine damage.
Signs Your Diesel Car Has Petrol in the Tank
Sometimes you might not realise the mistake immediately. Watch for these warning signs:
Engine struggles to start or won’t start at all
Rough idling or engine misfires
Warning lights on the dashboard, especially the check engine light
Loss of power or poor acceleration
Strange noises from the engine
If you notice any of these symptoms after refuelling, stop driving and seek help.
Preventing Petrol in Diesel Car Mistakes in Cambridgeshire
Avoiding misfuelling is the best way to protect your car. Here are some tips:
Always check the fuel pump label before filling up
Pay attention to the nozzle size; diesel nozzles are usually larger
Avoid distractions while refuelling
If you’re unsure, ask the petrol station staff for help
Use familiar petrol stations in Cambridge, St Ives, March, Cambourne, or Huntingdon where you feel confident
What to Expect When Calling a Misfuelling Service in Cambridgeshire
When you contact a local misfuelling expert, such as the team reachable at 0330 122 6640, they will:
Ask for details about your vehicle and the situation
Provide an estimate for the service
Arrange a prompt visit to your location or advise you to bring the car to their workshop
Perform the fuel draining and cleaning safely
Offer advice on how to avoid future mistakes
Many services in Cambridgeshire offer quick response times to minimise inconvenience.
Costs and Time Involved in Fixing Petrol in Diesel Cars
The cost depends on the amount of petrol added and the damage caused. Typically, the service includes:
Fuel draining and disposal
Fuel system cleaning
Replacement of fuel filters if needed
In Cambridgeshire, prices can range from £100 to £300 depending on the severity. The process usually takes a few hours, but it’s better than risking engine repairs that could cost thousands.
When to Consider Engine Repairs
If you drove the car for a long time after putting petrol in the diesel tank, the engine might suffer serious damage. Signs include:
Persistent engine knocking
Loss of power even after cleaning
Smoke from the exhaust
In these cases, you may need engine repairs or part replacements. A professional mechanic in Cambridgeshire can diagnose and advise on the best course of action.
Summary and Next Steps
Putting petrol in a diesel car in Cambridgeshire is a stressful situation but can be managed effectively with the right actions. Remember:
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