Quick answer
Diesel Engine Excessive Smoke: the most common causes are overfueling from leaking or stuck-open diesel injector, dpf saturated — soot not burned, expelled as visible black particulates, turbo over-boost from faulty wastegate — excess fuel, incomplete combustion. Metre Per Second (KPHB, Hyderabad) diagnoses the exact fault and repairs it same-day — typical work runs ₹500 – ₹1,000, with free pickup and drop across Hyderabad, OEM-grade parts and a 1-year warranty. Call +91 8555824915.
What causes Diesel Engine Excessive Smoke?
These are the faults we most often find behind this symptom on cars driven in Hyderabad's heat and stop-go traffic:
- Overfueling from leaking or stuck-open diesel injector
- DPF saturated — soot not burned, expelled as visible black particulates
- Turbo over-boost from faulty wastegate — excess fuel, incomplete combustion
- EGR valve failure causing insufficient exhaust gas recirculation — NOx and smoke
- Air filter severely blocked reducing oxygen for complete combustion
Repairs & indicative pricing (INR)
| Repair | Indicative price |
|---|---|
| Diesel smoke opacity test | ₹500 – ₹1,000 |
| Injector test and clean | ₹4,000 – ₹12,000 |
| DPF forced regeneration | ₹5,000 – ₹10,000 |
| EGR valve service | ₹2,500 – ₹8,000 |
| Air filter replacement | ₹800 – ₹3,000 |
Final price depends on diagnosis. We share a written estimate before any work — no surprises. Free pickup & drop across Hyderabad, OEM-grade parts and a 1-year warranty.
Frequently asked questions
My diesel car produces a lot of smoke and failed PUC in Hyderabad — fix?
Diesel smoke that causes PUC failure requires identifying the specific cause first — OBD scan (₹500) and smoke opacity test (₹500–₹1,000) at Metre Per Second. Excessive black smoke is almost always injectors or DPF. White smoke indicates coolant entry (head gasket or EGR cooler). Blue smoke is oil from turbo or rings. Each has a different fix — the diagnostic is essential before any parts are replaced.
Related car problems we fix in Hyderabad
Why Hyderabad drivers choose Metre Per Second
- Factory-grade diagnostics — we read the real fault, not just a generic code.
- Free pickup & drop across all of Hyderabad — KPHB, Kukatpally, Miyapur, Hitech City, Gachibowli, Banjara Hills, Secunderabad and more.
- 1-year unconditional warranty on parts and labour.
- Transparent, written estimates — typically 30–50% below authorised dealers.