Diagnostics & electronics
Hard starting & drivability diagnosis
Hard starting and a car that stumbles have overlapping causes — we separate fuel, ignition and sensors to find the real reason.
Our approach
Hard starting and drivability issues (misfire, jerking, unstable idle, hesitation on acceleration) can come from the battery and starter, the fuel system, ignition, sensors or the air intake. We test each system instead of swapping parts by elimination.
At Mr. Service we read the control unit, measure fuel pressure, check plugs, coils and sensors, and reproduce the symptom to confirm where the fault is before any repair.
Common symptoms
An engine slow to start cold or hot, long cranking, stalling at idle, power loss on hills, jerking or higher-than-normal consumption are typical signs.
These symptoms tend to worsen and can leave you stranded. Diagnosing early avoids a tow and larger repairs.
Why Mr. Service
We diagnose correctly, present a detailed quote and only proceed after your approval — with a 3-month warranty on labour. We serve every brand, domestic and imported, with service in Portuguese, English and Turkish.
Frequently asked questions
- Is it the battery or the engine?
- It can be either, or sensors and fuel. That is why we test each system before recommending the repair.
- The car only fails sometimes; can you find it?
- Intermittent faults need more test time, but we can trace them by reading live data and reproducing the symptom.
- Does it work for imported cars?
- Yes, every brand. Tell us the model and year; the quote comes before the repair, with a 3-month warranty.