Skip the auto shop - Our mechanics make house calls

Q: Difficult startup, on warmer days and after short distances

asked by on

My car wouldn't start occasionally. It mostly runs great. But, on warmer days or when I drive it for a short while, for about 45 minutes, it would have a sound like it has no fuel and it would crank but not start. I had the fuel pump relay, water pump, manifold gasket, spark plugs replaced along with the PCM, BCM and wires. The car runs great after sitting for about an hour. What could be the problem?

A: You may have an issue with your fuel pressu...

You may have an issue with your fuel pressure regulator. The fuel pressure regulator is responsible for maintaining a certain fuel pressure for the engine under all conditions. Due to the high heat that your engine is experiencing, your fuel may be vaporizing or burning too quickly. The fuel pressure regulator is supposed to be able to compensate for temperature changes that can affect fuel pressure. I would recommend having your fuel pressure tested by a certified mechanic to ensure why your car have difficulty starting up.

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・Fair and transparent pricing

Get a quote

What others are asking

Q: White smoke coming from underhood thermostat went up fast. Big leek under radiator on passenger side.

Hi there. when the white smoke appeared under the hood and there was a large puddle under the radiator, then the radiator hose may have blown off. This would be caused by excessive heat or excessive pressure. If the cooling...

Q: Car won't start after the ignition switch replacement

Hello. If your 1998 Buick Riviera cannot be started remotely or when the key is turned all the way, then you either have a bad starter relay, or there can be an issue with the starter or the transmission position...

Q: "All wheel drive is off"

Hello. The "all wheel drive is off" message is displayed when the all wheel drive mechanism is turned off, possibly due to a fault detected in the all wheel drive system. Some vehicles allow you to manually switch the all...

Related articles

How Long Does a Distributor O Ring Last?
The distributor is part of the ignition system in your vehicle and its purpose is to route high voltage from the ignition coil to the spark plug. The spark plug then...
P0052 OBD-II Trouble Code: HO2S Heater Control Circuit High (Bank 2 Sensor 1)
P0052 code definition HO2S Heater Control Circuit High (Bank 2 Sensor 1) What the P0052 code means This code is seen when the Engine Control Module (ECM) tries to control the...
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.