HT Leads


Does your vehicles engine misfire, does it judder due to a running problem?

Your vehicle may have a weak spark due to your HT leads breaking down.

Book now if your vehicle has a running problem. Our mechanics have the knowledge and capability to test HT leads at our workshop in Gillingham in Medway.

What are HT leads?

High Tension leads are more commonly referred to as HT leads. They are the wires that connect a distributor or ignition coil to each of the spark plugs of a petrol engine.

HT leads, like many engine components, wear out over time. Each lead contains only one wire and allows current to flow from the distributor or coil to the spark plug. The electrical circuit is completed through the earthed engine via the spark plug which is connected to the negativeĀ battery terminal.

What are they made from?

HT leads have an outer insulation made of a very flexible material such as silicone or rubber, furthermore it is heat resistant. As a result the thick insulation prevents arcing from the cable to an earthed engine component, a rubber boot covers each terminal.

When your your vehicle requires a new set of HT leads, spark plugs are also generally replaced. Quite often there will be visible signs that the spark has been arcing down the side of HT lead terminal. Consequently there will be scorch marks on the side of the spark plugs.

Book now for one of our mechanics to carry out some initial basic checks. These checks include checking the resistance of the Ht leads. Our mechanics will highlight any weakness and give you the correct diagnosis.

More modern systems.

In modern systems the ignition or spark is electronically controlled by the ECU. The ECU acts on information given from a cam or crank sensors. Some of these modern systems do not have HT leads because the coils are placed directly on top of the spark plug (coil-on-plug or Direct Ignition).

A breakdown in a HT lead can result in a weak spark as a result the engine may misfire and cause rough running. This will affect fuel consumption and consequently have a loss of power. The total failure of the main HT king lead will probably cause the vehicle not to start at all.

Why Choose Autoexperts Medway?

Autoexperts Medway in Gillingham have established a superb reputation for high quality vehicle repair services. Refer to our testimonials from our customers from Chatham, Gillingham and Rochester on our testimonial page.

Autoexperts Medway in Gillingham are near to both Rochester and Gillingham in the heart of Medway we areĀ the local garage who can diagnose and fix all makes of vehicles.

Share this:
Share this:

Contact Form


MOT DUE?

With two bays we are one of the largest testing stations in Medway. Use our booking request form to book your MOT and one of our team will get back to you to confirm.

SERVICES

RADIAL CAR TYRE COMMERCIAL VAN SERVICE GILLINGHAM MEDWAY

Tyres


Replacement – Balancing – Punctures

CLUTCH JUDDER VIBRATION NOISE LOST SLIP CLICK WHEEL GILLINGHAM MEDWAY

Transmission


Clutch – Drive Shafts – Fly Wheels – Gearboxes – Prop Shafts – Rear Axles – Wheel Bearings – CV Joints and Gaitors

BALL JOINTS COIL SPRINGS SHOCK ABSORBERS STEERING RACKS SUSPENSION ARM

Steering and Suspension


Ball Joints – Bushes – Coil Spring – Power Steering – Shock Absorbers – Steering Rack – Suspension Arms – Tracking


EXHAUST CAT FIT BLOW RATTLE KNOCK BOX PIPE GILLINGHAM MEDWAY

Exhaust


Complete Systems – Catalytic Converters – Downpipes – Silencer – Manifolds – Oxygen Sensors – Rear Box – Particle Filters – Emissions

TURBO CAMBELT TIMING CHAIN CYLINDER HEAD OIL PUMP GILLINGHAM MEDWAY

Engines


Cam Shafts – Cambelts – Cylinder Head – Fan Belts – Cylinder Head Gasket – Oil Pumps – Timing Chain – Turbos – Valves

Electrical Engine Warning Light

Electrical


Airbags – Alternators – Batteries – Bulbs – Coils – Diagnostics – HT Leads – Safety Restraint Systems (SRS) – Sensors – Spark Plugs – Starter Motors -Warning Lights – Washers


COOLING SYSTEMS HOSES TEMPERATURE SENSORS RADIATORS THERMOSTATS WATER PUMP

Cooling Systems


Anti-Freeze – Pressure Caps – Expansion Bottle – Hoses – Temperature Sensors – Radiators – Thermostats – Water Pump

brakes

Brakes


Anti-Lock Brakes – Brake Master Cylinder – Brake Callipers – Discs – Drums – Fluid – Hoses – Pads – Pipes – Servos – Shoes

Air-Conditioning

Air Conditioning


Blowers – Heater – Heater Matrix – Air Con Re Gas