Skip the auto shop - Our mechanics make house calls

Q: Loss of power when in gear. Replaced spark plugs and the same problem continues.

asked by on

hello i have replaced the spark plugs on my 2000 ford e150 and coils r working fine but when i put it on gear lost all the power wont move the motor turn weak

Hi there. If the engine runs great operating in park or neutral, then there may be a problem with the brake system or transmission issue. First check the brakes and see if they are released. Put the vehicle in neutral with the engine off and try to push the vehicle by hand. If you are able to push the vehicle, then the brakes are released. If you are unable to push the vehicle, then the brakes could be engaged causing the vehicle to not move. If the brakes are good and working properly, then its possible that the transmission torque converter has failed. If the torque converter is unable to produce a vortec pressure, then the stator clutch broke inside the torque converter. Then the torque converter would need replaced. If the transmission was slipping or the clutch was slipping, then this can also cause the vehicle to have a poor acceleration making the engine seem weak. If the transmission was replaced or the clutch was replaced and there is still a loss of power, then its possible that the engine has worn rings and valves may not be sealing properly causing the engine to have an internal loss of power. If you need further assistance with your engine having a loss of power, then seek out a professional, such as one from Your Mechanic, to help you.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1000 mechanics are ready to answer your question.
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details
  1. Home
  2. Questions
  3. Loss of power when in gear. Replaced spark plugs and the same problem continues.

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing

Get a quote

What others are asking

Q: Car doesn't drive when cold

Usually mechanics make the mistake in referring to things that might confuse a car owner. In an automatic transmission there is a torque converter, which is comprised of multiple components including t a turbine, an impeller, a stator, and a...

Q: Wierd rpm spike when coasting in vehicle.

Your car has an automatic transmission and will automatically downshift as the speed of the vehicle slows down. This spike in RPM's is just the downward gear spinning the motor up slightly as it downshifts. Nothing to worry about as...

Q: I have a 2002 Chrysler 300m that had been sitting up for a year. I replaced the rack and pinion but when backing up steering is hard.

Hi there. The issue with the steering being hard seems to be with the pump still having air in it. Start the engine and open the bleed valve slightly. Turn the steering wheel several times from left to right and...

Related articles

P0240 OBD-II Trouble Code: Turbocharger Boost Sensor B Circuit Range/Performance
P0240 code definition Turbocharger Boost Sensor B Circuit Range/Performance What the P0240 code means P0240 is an OBD-II generic code triggered when the Engine Control Module (ECM) detects the intake boost...
P2428 OBD-II Trouble Code: Exhaust Gas Temperature Too High Bank 1
P2428 code definition A P2428 trouble code signifies that the PCM has detected a problem in the exhaust gas temperature sensor circuit in bank 1, which subsequently contains the number one...
How Much Does a Mechanic Make in Vermont?
Automotive technician jobs in Vermont have an average mechanic salary of $37k, with some mechanics earning a salary of $53k.