Q: The car cannot start right away when the engine's cold

asked by on

In the last year, my car has been having difficulty starting up when the engine is cold. If I attempt to start it after it sat for about 10 minutes or so, there are no problems. It starts right away. However, if it sat for half an hour or more, I have to crank it for several second and wait. Then, when I crank it again, I would finally start it up. It's as if there is a delay in the fuel injecting system somewhere or as if the fuel pump doesn't work right. Do you have any idea what could cause this?

It sounds like you are on the right track with thinking it’s a fuel-related issue with your 2000 Audi A8 Quattro. Your Audi may not be getting enough fuel for a cold start due to incorrect sensor data. Or it may be leaking off fuel pressure internally resulting in long crank times. The tests that should be performed include a scan for diagnostic trouble codes (DTCs), a look at engine sensor data (including fuel trims) to see if everything is within normal ranges, and a check for fuel pressure both while the key is on and while it’s cranking. If you want to have this checked, a certified technician from YourMechanic can come to your car’s location to diagnose the car’s hard start and let you know what needs to be done.

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. The car cannot start right away when the engine's cold

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: Q: Car cutting off while driving

This could be a fuel delivery issue, but it is hard to say exactly. Your vehicle has a complex engine control system that can self diagnose issues most of the time. Start by having the computer read and see if...

Q: Rear end noise, weak acceleration

Hello. A better description of what it sounds like would help me to determine what you need. If you are getting a grinding, growling, or popping noise, then it is more than likely a failing rear differential. These commonly fail...

Q: I installed a new fuel sending unit the gas tank is full and it shows empty when u take all gas out it shows full what could it be

It sounds like you put in an incorrect sending unit or it is defective and needs a replacement. The fuel sending unit will vary resistance from low to high resistance controlling the gauge. If the signal from the sending unit...

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...
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...
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.