Mobile Spark Plug Replacement & Engine Tune-Up in La Cantera, TX

Spark Plug Replacement Near La Cantera

If you work at one of the offices along Hausman Road or in the La Cantera area at I-10 and Loop 1604, we can replace spark plugs in the parking lot while you work, where the lot allows it. Most four-cylinder jobs take about an hour.

Highway Miles and Plug Life

Modern iridium and platinum plugs often last around 100,000 miles, and steady highway driving is easy on them. The usual signs that they are done are a rough idle, hesitation when merging onto I-10, and a misfire code (P0300 to P0308). We check the coils and boots at the same time, since a cracked boot can cause the same misfire.

Coils, Boots, and Misfire Codes

On most modern engines each spark plug has its own ignition coil on top of it. A misfire code says which cylinder is misfiring, not why. We move the coil to another cylinder and see if the misfire follows it, inspect the boot for carbon tracking, and check the plug gap and condition. That way a coil is replaced only when the coil is the problem.

Working in an Office or Retail Lot

Spark plugs suit a workday appointment: the car does not need to move and nothing drains onto the pavement. Some property managers around La Cantera and The Rim do not allow vehicle work in their lots, so check with yours first, or tell us and we will meet you at home. We bring a mat and leave the space the way we found it.

Aluminum Heads and Thread Care

Most engines today have aluminum cylinder heads, and plug threads in aluminum can strip if a plug is overtightened or cross-threaded. We let the engine cool, blow out debris around each plug before removing it so nothing falls into the cylinder, and torque new plugs to the manufacturer's spec, following the plug maker's guidance on anti-seize.

Pricing

Starting at $149. V6 engines with the rear plugs under the intake take longer, and we quote that in writing first.

Prices, warranty and the full checklist for this job: Spark Plugs & Tune-Up in San Antonio.