Because your foot is on the gas and something is wrong with your engine.
Hi the flashing coil light doubles as an engine management light the computer has probably got a stored fault code and put the engine into safe mode. Diagnostic check required.
Could be a restriction in the exhaust such as a catalytic converter that has had a meltdown. If the check engine light is or has illuminated, check the codes.
i think the computer need to be reprogram
If you have a "check engine" light, check for codes. Also check for vacuum leaks.
Excessive internal engine wear? Install a manual gauge the check oil pressure
https://online.revs.nsw.gov.au/revs/public.htm
Battery fails to charge, alt light comes on, sometimes only at low revs. Check with meter shows low or no charging voltage (close to or less than battery voltage) voltage does not increase to charging volts with engine revs increase
check for vaccume leaks. this can sometimes be hard to do so take you time.
There are several reasons why your car may be overheating. Check the thermostat to be sure it isn't stuck. If the car revs up and down, the timing may need to be adjusted.
Have you checked engine mountings!
Check your radiator is full
it holds the transmission in gear longer as you drive. Right, it just delays the shifting so the engine stays at higher revs where the power is the strongest.