Skip the auto shop - Our mechanics make house calls

Q: Starting issues when engine warms up

asked by on

I've got troubles starting my car. To be more specific, the car won't start after I drive it for 15 minutes and more, when the engine gets warmed up. I don't think that the problem is with the starter as I can hear the sound of it when I attempt to restart the car. Also, I installed a new battery in the car, along with spark plugs, timing chain and the new radiator. So, the engine cannot turn over right away. It usually takes me about 20 minutes of trying and the engine would eventually start back up. I took the car to several shops but none managed to fix the problem. Do you have any idea what might be causing this?

A: Hello there, thank you for asking about you...

Hello there, thank you for asking about your 1990 Oldsmobile Cutlass Calais. Your symptoms are very similar to a vehicle experiencing a problem with the intake air temperature sensor. Other reasons for such a hard start can be low fuel pressure from a weak pump or clogged fuel filter. Because you mentioned the vehicle is harder to start after it is warmed up, I believe the intake air temperature sensor has failed and is continuously telling the engine computer the air is very cold. In this case the computer will richen the fuel mixture to compensate for the more dense cold air. This creates too rich of a mixture and the engine must turn over and turn over trying to expel the extra fuel before starting. If you would like help, a mobile technician from YourMechanic can come to your home or office to inspect your car's hard start and replace the fuel pump or filter if necessary.

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

Ask a Mechanic
(100% Free)

Have a car question? Get free advice from our top-rated mechanics.

Ask A Mechanic
Over 10,000 questions answered!

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Save up to 30%

Get a quote

What others are asking

Q: Belt broke in car

Typically when this happens, replacing the water pump and belt will usually solve the problem. I would have a certified mechanic, such as one from YourMechanic, come out and inspect your problem and properly replace your water pump and drive...

Q: Fuel rail once went bad. Driver side spark plugs good other side black. Fires up idles a few secs then shuts down.

You need to have the fuel pressure checked to see if the pressure holds steady when the key is cycling on and off. The pressure regulator may be leaking fuel into the intake flooding the three cylinders with fuel. Have...

Q: Truck won't start after replacing fuel pump and filter. It acts like it has no spark - 2000 Jeep Grand Cherokee

If the motor started and ran for five minutes, it is highly unlikely that it has no spark. You may want to consider checking the fuel pressure regulator. As you may know, this is responsible for helping maintain the correct...

Related articles

How Long Does a Heater Control Valve Last?
Keeping the right amount of coolant in a car is essential in keeping the engine at the right temperature. Failing to have the right amount of coolant or even bad elements...
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...
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...