What to check before and after a remap
Servicing, spark plugs and coils, boost leaks, fault codes, warm-up: a practical checklist to get the right result from a remap and keep it.
A remap builds on the engine you already have. If something is wrong, new software does not fix it — it exposes it. That is why a little checking before and a little care afterwards make a big difference.
Before: the condition of the car
Servicing. If an oil change is due soon, do it first. Clean oil of the right specification, a fresh air filter and fuel filter are the foundation. On diesels with a DPF the oil must be the low-ash type the manufacturer specifies.
Ignition on petrol engines. On turbo petrol engines, spark plugs and ignition coils work harder with more cylinder pressure. Worn plugs or a coil on its last legs can cause misfires that were not noticeable before. If they are close to their replacement interval, change them.
Boost leaks. A split hose, a loose intercooler pipe or a worn diverter valve means the turbo works harder to reach the requested pressure. Leaks often only show under full load — exactly where we check on the dyno.
Diesels: DPF, EGR, injectors. A particulate filter close to its limit, a sticking EGR valve or a leaking injector need to be dealt with first.
Clutch and gearbox. A clutch that already slips will not cope with more torque. On automatics, judder or delayed engagement is a sign to get it checked.
Fault codes and warning lights. If there is an active fault in the ECU, we need to find the cause before anything else.
Tell us what has been changed. Exhaust, air filter, intercooler, a previous remap — all of these affect the calibration we write.
At the workshop: the baseline run
Every car goes on the 4WD dyno before we write anything. That run shows whether the engine is performing as it should in standard form. At the same time we log pressures, temperatures and ignition corrections. If something is not right, we tell you and decide together how to proceed.
After: the first days
Warm-up. Coolant warms up faster than oil. Wait for the oil temperature to come up before using full performance — this always applies, but with more torque it matters more. The same at the end: after hard driving, let the engine idle briefly or drive gently for the last few kilometres so the turbo can cool down.
Fuel. Use the fuel the calibration was written for. If we told you it was set up for 98 or 100 octane, 95 will make the ECU pull ignition timing and you will lose performance.
Watch for signs. Warning lights, unusual vibration, black smoke, clutch slip or more frequent DPF regenerations than before — get in touch. It is better to check something small early.
Regenerations. On diesels, if the fan keeps running after switch-off or the idle is raised, a regeneration may be in progress. If you can, finish the drive rather than switching off.
In the long run
- Service on time. Oil, filters and plugs at the manufacturer's intervals, or a little sooner if you drive enthusiastically.
- Tyres and brakes. More torque means more work for the tyres. Check pressures and wear.
- Insurance. Tell your insurer about the modification where required.
- If something mechanical changes — a new exhaust, a bigger intercooler — the calibration should be checked again.
Have a question about your own car? Start with the car finder or request a quote.