Service category
Diagnostics & Engine Tune-Ups in Chicago
A diagnostic scan, ignition service and leak repair solve different problems. These services help you explore the next step when a warning light appears, a scheduled ignition component is due or an inspection identifies a specific leak. A scan is a starting point, not a parts replacement list.
- 4.9 on Google (339 reviews)
- Mon–Sat 9 AM–6 PM
- 59th & Ashland, Chicago
Diagnostics & Tune-Ups services we offer
Diagnostic Computer Scan
A dashboard warning light is a starting point for investigation. A diagnostic computer scan retrieves available trouble codes from supported vehicle systems. A code describes a detected condition; it does not by itself prove that a particular sensor or part has failed.
- A check engine light
- An illuminated system warning
- A stored or recurring trouble code
Fuel System Cleaning
Fuel system cleaning is a maintenance option for certain deposit-related concerns. Whether it is appropriate depends on the engine design, service history and symptoms. It should not replace diagnosis of a persistent misfire, a warning light or a suspected fuel delivery failure.
- A maintenance recommendation after inspection
- A deposit-related concern
- Questions about fuel system service history
Spark Plug Replacement
Spark plugs ignite the air-fuel mixture in gasoline engines. Worn or fouled plugs can contribute to poor running, but a misfire may also involve ignition coils, fuel delivery or mechanical condition. Correct plug specifications and installation are important.
- Spark plug maintenance due
- Rough engine operation
- A diagnosed worn or fouled plug
Ignition Coil Replacement
Ignition coils provide the voltage used by spark plugs on gasoline engines. A faulty coil can contribute to a misfire, but similar symptoms can come from plugs, injectors, wiring or mechanical problems. Diagnosis should guide replacement.
- A diagnosed ignition coil fault
- Engine misfire symptoms
- Rough operation under load
Valve Cover Gasket Repair
A valve cover gasket seals the joint between the valve cover and the cylinder head. A worn seal can allow engine oil to escape. The repair addresses a confirmed leak at that joint; it does not restore compression or correct every engine oil leak.
- Oil seepage near the valve cover
- Oil found in spark plug wells
- A confirmed valve cover gasket leak
Popular diagnostics & tune-ups services near 59th & Ashland
Posted prices · 5901 S Ashland Ave
Diagnostics & Tune-Ups prices
Tune-up prices — 4-cylinder
Parts and labor included.
| Service | Price |
|---|---|
| Basic tune-up: spark plugs | $160 |
| Standard tune-up: spark plugs + engine air filter | $190 |
| Full tune-up: spark plugs, engine & cabin air filters, oil change, throttle body cleaning | $260 |
Tune-up prices — 6-cylinder
Parts and labor included.
| Service | Price |
|---|---|
| Basic tune-up: spark plugs | $220 |
| Standard tune-up: spark plugs + engine air filter | $250 |
| Full tune-up: spark plugs, engine & cabin air filters, oil change, throttle body cleaning | $320 |
Prices are the shop’s posted prices in US dollars. Oil change prices are plus tax. Card and app payment fees are listed under payment methods. See the full price list.
Services in this category
Choose a service below for its specific purpose, inspection considerations and frequently asked questions. Each listed service has its own page.
Prepare for a useful conversation
Have your vehicle year, make and model ready. Describe when the symptom happens and mention recent repairs or service reminders. Ask which inspection or maintenance scope makes sense before deciding on a replacement. Pricing and completion time depend on the vehicle and the work.
Common questions
Does a tune-up fix a check engine light?
Not necessarily. Tune-up maintenance and fault diagnosis have different purposes. A warning light should be evaluated rather than assumed to need spark plugs or cleaning.
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Customer feedback
What drivers say
“I love this place, been going here since 2010, this place always kept my car running good and I never had an issue wit them. Highly recommend”
Checkoutfinesse GangGoogle review · Sep 2023“This company very reliable the guy moe very excellent worker I wouldn’t recommend any one this is my go to guy a must go the very best in the city..Thank you moe for your service.”
Shamia ColemanGoogle review · Aug 2023“Good customer service Get 4 oil changes with Chicago express lube and the 5th one is free❤️”
Miketa RandleGoogle review · Aug 2023Full service menu
More auto services in Chicago
Chicago Express Auto Service
Talk to the shop about your vehicle.
Oil changes, brake repair, battery testing, check engine diagnostics and suspension work at 5901 South Ashland Avenue. Monday–Saturday, 9 AM–6 PM.