Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSMAZDA1999626 ES, 2.5 D, STANDARDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 25 (ENGINE CONTROLS - TROUBLE SHOOTING - NO CODES)
1999 Mazda 626 ES, 2.5 D, Standard
Section 25 (Engine Controls - Trouble Shooting - No Codes)
1999 Mazda 626 ES, 2.5 D, StandardSECTION Section 25 (Engine Controls - Trouble Shooting - No Codes)
WARNING: This page does not describe the selected car, but rather 10 other vehicles, including the 2002 Mazda Tribute, 2002 Mazda Protege5, 2002 Mazda Protege, 2002 Mazda Millenia, and 2002 Mazda MX-5 Miata. However, it is still accessible from the selected car via links, so may be relevant.
- Introduction
- Symptom Diagnosis
- Notes
- Abnormal Engine Noise
- A/C Does Not Turn Off During Wide Open Throttle
- A/C Is Always On Or Compressor Runs Continuously
- Constant Voltage
- Cranks Normally But Will Not Start
- Emissions Failure
- Engine Runs Rough, Misses, Hesitates, Stumbles, Surges Or Stalls During Acceleration Or Cruise, Or Engine Bucks Or Jerks During Acceleration, Cruise Or Deceleration
- Engine Stalls At Idle Or Just After Starting
- Engine Vibration
- Excessive Oil Consumption
- Exhaust Smoke
- Exhaust Sulphur (Rotten Egg) Smell
- Fast Idle Or Run-On
- Fuel Odor In Engine Compartment
- Hard To Start (Long Cranking, Erratic Cranking Or Erratic Starting)
- Knocking Or Pinging During Acceleration Or Cruise
- Lack Or Loss Of Power During Acceleration Or Cruise
- Low Idle Or Engine Stalls During Deceleration
- Poor Fuel Economy
- Rough Or Unstable Idle
- Slow Return To Idle
- Will Not Crank
- INTERMITTENTS
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.