Q: Weak startup when the engine is warmed up - 2000 Toyota MR2

asked by on

When I start the car after it's been sitting for a while and the engine is cold, I have no problems at all. It starts and runs great. However, If I drive it for a while and then stop it, the car would crank fine when I attempt to turn it on, but it would barely start. I have no other issues with it besides this weak startup when the engine is warmed up. What could be causing this?

Hey there. Heat causes electrical resistance to increase. Given the age of the vehicle, your ignition system might be "struggling." You should thoroughly evaluate the ignition system. If that checks out, check the fuel pump output and condition of the fuel injectors. You may also have electrical concerns since the injectors have coils in them. For example, you could have a combination of physically plugged injectors and electrical issues occurring at the same time. If you need to have this problem scoped out, a certified professional from YourMechanic can come to your car’s location to diagnose the hard start and follow through with needed repairs.

Was this answer helpful?
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. Weak startup when the engine is warmed up - 2000 Toyota MR2

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 won't start I can hear it trying to crank. I've just replaced the alternator and battery it just won't turn over...

This suggests that the motor have run out of oil. When the oil pressure gauge reads zero, this means that there is not enough oil pressure inside the motor to properly lubricate engine components properly. When this happens, you may...

Q: Bought a MR2 roadster that has the Sequential Manual Transmission (bought it as a non driver) Toyota MR2

Hi there - the first task is to get stored problem codes - which may require a Toyota-specific code reader to get the level of diagnostic needed. Sequential Manual Transmissions are very sophisticated, computer-managed units, and very dependent on the...

Q: As I'm driving, all my lights inside/out of the car turn off and the car still stays on. But when I turn the car off it won't turn over

Hello there. The charging system on the car may not be charging the battery as you drive and the systems that keep the engine running are priority so the engine will stay running until the voltage drops below about 9...

Related articles

What Causes Hoses to Leak?
While the largest part of your engine is mechanical, hydraulics plays a significant role. You’ll find fluids at work in a number of different areas. Your car's fluids include: Engine oil Transmission...
How to Avoid Back Pain in a Car
If you have back problems, sitting in a car for an extended period of time can be excruciating. Even without back problems, you could experience discomfort and soreness from...
P2103 OBD-II Trouble Code: Throttle Actuator Control Motor Circuit High
P2103 means there is a fault with the throttle actuator control motor circuit, likely due to a defective electrical component or part.