Hot Start Fix - Reliable Hot Restarts
Resolves difficult hot restarts by correcting the ECU's warm-start strategy.
A hot-start problem is when a warm engine cranks for a long time, or struggles to fire, after only a short stop. It is a familiar frustration on some diesels and tends to be worse in summer.
The cause usually lies in how the ECU handles rail pressure, injection and its start strategy when the engine is already hot, so the first attempts to fire fall outside the ideal window.
The Hot Start fix optimises the warm-start parameters in the ECU, including rail-pressure compensation, injection timing and the coolant-temperature start calibration. With those corrected the engine fires promptly even when hot.
It applies to both diesel and petrol engines that show the symptom, and the change is specific to your ECU and fully reversible to stock.
Advantages & Features
- Reliable hot restarts
- No long cranking when warm
- Better summer starting
- Corrected injection and rail-pressure warm-start behaviour
- Diesel and petrol engines
- Fully reversible to stock
Related solutions
Price
Paid with credits from your account balance. The credit amount for your ECU is shown after the file is analysed, before you confirm. See credit packages
Frequently Asked Questions
What problem does the Hot Start fix solve?
Engines that start fine when cold but crank for a long time or stall when restarted hot. The ECU's warm-start fuelling and timing strategy is corrected.
Which cars are affected?
Typically older diesel and some petrol engines, often after a tuning file or fuel-system change. If the cause is mechanical (injector leak-back, fuel pressure) the file alone will not fix it.
Which file do I need to upload?
A full read of the current ECU file and a short description of the symptom in the note.
How long does the Hot Start fix take?
Typically 10-45 minutes when prepared by a tuner.
Is it reversible?
Yes, the original file is kept and can be flashed back.
Does it affect emissions or other functions?
No. Only the warm-start strategy is adjusted; emission monitoring and normal running are unchanged.