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Power loss under load (uphill, accelerating, A/C on) reveals weakness that's hidden during easy driving. Diagnose early — small issues become expensive ones.
In our network we see these in roughly this order. Diagnostic comes first — never authorise a repair without a written diagnostic report.
Most common on cars 80,000+ km. Replacement: ₹800-2,500.
Boost-pressure drops under load. Turbo actuator or full turbo replacement: ₹15,000-1,20,000.
City-only diesel use prevents regen. Forced regen (₹2,500-6,500) before replacement (₹65,000+).
Pressure drops under high demand. Fuel pump replacement: ₹6,500-15,000.
Engine load is highest going uphill. Any weakness — fuel, air, ignition, boost — shows up here first.
Yes if you only drive in city. DPF needs highway speeds for regen. A 30-min highway run every 1,000 km prevents costly DPF clogging.
OBD-II scan first. Then fuel-pressure test, MAF reading, boost-pressure log. Most workshops do this for ₹1,500-3,500.
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