Lazar Motors
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Fuel injector repairs in Loughborough

Rough running, smoke or poor starting traced to the injectors and put right.

Close-up of a diesel engine on a pallet, showing the fuel rail, sensors and EGR pipe
Fuel rail and sensors on a diesel engine

Injectors spray a precisely measured amount of fuel into the engine. When one starts to leak, stick or block, the engine runs unevenly, uses more fuel and can be hard to start.

Injector symptoms overlap with plenty of other faults, so we test before replacing anything. That way only the injectors that have actually failed get replaced.

Signs of an injector problem

  • Rough idle or a misfire
  • Hard starting, especially from cold
  • Loss of power or hesitation when you accelerate
  • More smoke than usual from the exhaust
  • Worse fuel economy, or a smell of fuel
  • A knocking noise from a diesel engine
  • The engine management light

What’s included

  • Reading fault codes and live data
  • Testing to find which injector, if any, is at fault
  • Removing and replacing faulty injectors, with new seals
  • Coding the new injectors to the engine's computer where the car needs it
  • Clearing the codes and checking the engine runs as it should

Common questions

Can I drive with a faulty injector?

It's not a good idea for long. A leaking injector can wash oil off the cylinder walls and dilute the engine oil, and unburnt fuel can damage the catalytic converter or particulate filter. The sooner it's sorted, the less chance of a bigger bill.

Do all the injectors need replacing at once?

Not necessarily. If testing shows one has failed and the others are healthy, only that one needs changing.

Is it definitely the injectors?

Not always. Misfires, smoke and poor starting can also come from glow plugs, coils, sensors or air leaks, which is why the job starts with diagnostics rather than parts.

  • Diagnostics

    Warning light on, or something not right. We find the cause before anything gets replaced.

  • AdBlue fault repairs

    An AdBlue warning that won't clear, or a no-restart countdown on the dash. We find the fault and fix it.

  • Engine replacement

    When an engine is past saving, we take it out and fit a replacement.

See all services. We look after cars from Loughborough, the villages around it and the rest of Leicestershire.

Book a slot that fits around work

Open Monday to Friday 5pm to 10pm, Saturday 10am to 3pm.