Mobile Auto Diagnostics in Houston

Parts-store code readers hand you a number and a guess. A P0300 can be coils, plugs, injectors, a vacuum leak or low fuel pressure — replacing parts one at a time is how people spend hundreds of dollars and still have a misfire. I pull codes and freeze-frame data, then verify with live sensor readings and electrical testing so the repair is based on evidence.

• Check-engine light and stored/pending codes
• Live sensor and fuel-trim data
• Misfire and rough-running diagnosis
• No-start and crank-no-run testing
• Battery, starter draw and alternator output
• Parasitic draw and dead-battery-overnight faults
• Voltage-drop and ground testing on suspect circuits
• Cooling and overheating causes
• Fuel delivery and pressure concerns
• Diesel engine and ECM faults

• Check-engine light steady or flashing
• Rough idle, hesitation or a stumble under load
• Cranks but won't start, or starts only sometimes
• Battery keeps dying overnight
• Dash lights flicker or accessories cut out
• Poor fuel mileage with no obvious cause
• Failed inspection for an emissions code
• Temperature gauge climbing in traffic

Send the year, make, model and the exact symptom — including when it happens, since intermittent faults are the ones worth describing carefully. I arrive with scan tools, meters and test equipment, diagnose at the vehicle, and walk you through the findings. You get a diagnostic fee and a straight repair price up front, and many faults get repaired the same visit.

If the real fix needs a shop — internal engine or transmission work, for example — I tell you plainly instead of taking your money for a repair that won't hold.