1. GENERAL INFORMATION Movie S 125i
1-22
ENGINE LACKS POWER
Possible cause
1. Raise wheel off the ground Wheels do not Brake dragging
and spin by hand spin freely Worn or damaged wheel bearing
Wheel spins freely
2. Check tire pressure Pressure low Faulty tire valve
Punctured tire
Pressure normal
3. Accelerate lightly Engine speed does Air cleaner dirty
not increase Restricted fuel flow
Clogged muffler
Engine speed increase Pinched fuel tank breather
4. Check ignition timing Incorrect Faulty ECU
Faulty ignition pulse generator
Correct
5. Test cylinder compression Incorrect Valve stuck open
Worn cylinder and piston rings
Leaking head gasket
Normal Improper valve timing
6. Inspect fuel flow Abnormal Faulty pressure regulator
Normal
7. Inspect the fuel injector Abnormal Faulty injector
Normal
8. Remove spark plug Fouled or discolored Faulty spark plug
Not fouled or discolored
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