Ignition Coil & Spark Plug Replacement in Plano, TX

Ignition Coil & Spark Plug Replacement for Plano drivers

A misfire shows up fastest when you're merging onto the Dallas North Tollway or SH-121 and the engine stumbles under load. A flashing check engine light means stop driving hard right away. We find the misfiring cylinder and replace coils and plugs in your Plano driveway, and Collin County's emissions test is one more reason to fix it quickly.

Plano driving is a mix of tollway speed and stop-and-go. You cruise at 70 on the Tollway or SH-121, then sit in backups on US-75 and through the lights on Preston, Park and Spring Creek. Lots of Plano cars also spend the workday parked in open office lots around Legacy and the corporate campuses.

Signs of a misfire

Engine shakes or stumbles at idle or under acceleration
Flashing check engine light
Codes P0300 to P0308
Loss of power or hesitation when merging
Worse fuel mileage
Smell of raw fuel from the exhaust

Rise High mobile mechanic working on a vehicle in Plano, TX

What we do on a mobile misfire repair visit

Find the cylinder

We read misfire data to find which cylinder is missing and test whether it's the coil, plug, injector or a vacuum leak.

Ignition coils

We replace failed coils, and tell you if the others are near the end of their life too.

Spark plugs

We install the correct plugs, gapped and torqued to spec, which is important on aluminum heads.

Verify the fix

We clear the codes and test-drive to confirm the misfire is gone.

When a shop is the better choice

Rear spark plugs on some transverse V6 engines require removing the intake manifold, which takes longer. A misfire from low compression points to internal engine trouble that needs a shop.

What it costs in Plano

Diagnostic Visit: $150

A $50 non-refundable deposit to book and $100 when the diagnosis is complete. Best when you're not sure what's wrong.

Repair Visit: $50 + parts & labor

Booking and travel fee, plus parts and labor. Get an instant repair price from your VIN on our Get a Quote page.

Where we work in Plano

Areas: Legacy West, Willow Bend, Downtown Plano, West Plano, East Plano / Jupiter Rd, Spring Creek & Parker Rd, Windhaven, Haggard Park

Roads we cover: Dallas North Tollway, US-75 (Central Expressway), President George Bush Turnpike, Sam Rayburn Tollway (SH-121), Preston Rd, Spring Creek Pkwy

Ignition Coil & Spark Plug Replacement in Plano: questions

Is it safe to drive with a flashing check engine light?

Drive as little as possible. A flashing light usually means a misfire is sending unburned fuel into the catalytic converter, which can overheat and destroy it.

Coil or spark plug: which is bad?

We can swap the coil to another cylinder and see if the misfire follows it. That tells us whether the coil or the plug is the problem.

Can you replace spark plugs at my home in Plano?

Yes. Coils and plugs are well suited to mobile service in your Plano driveway or work lot.

What does misfire repair cost?

If you don't know the cause, start with the $150 diagnostic visit. Repairs are a $50 booking and travel fee plus parts and labor, quoted before we start.