Q: The car takes about 5 cranks to start and once it does start the car jerks and only idles at about 500 rpm

asked by on

the car takes about 5 cranks to start and once it starts its idles horrible with engine jerking when i drive down the road it bogs down eventually the rpms shoot up and the car takes off then there is a sputtering noise and it bogs down again even with my foot on the gas.

My car has 165000 miles.
My car has an automatic transmission.

This is a fuel supply problem. Fuel pressure will be the key indicator for which component of the fuel system isn’t performing as needed. Check to be sure the fuel pump relay is good, and the fuel pump is running continuously.

Make sure the fuel filter isn’t clogged if fuel pressure remains low all the time. If fuel pressure still isn’t coming up to design specification, either the fuel pressure regulator is not closing properly to keep pressure up, or the fuel pump is worn such that it can’t build up adequate pressure.

I would recommend having YourMechanic diagnose this issue, provide an accurate assessment of damage, and estimate the cost of repairs. YourMechanic can dispatch a mobile, professional mechanic to your location for a proper diagnosis of your starting issue and help you repair the issue as necessary.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1,000 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!
  1. Home
  2. Questions
  3. The car takes about 5 cranks to start and once it does start the car jerks and only idles at about 500 rpm

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: Replaced missing ecm fuses now hear clicking

Not all the slots in the use panel will be occupied. The same panel is used in a variety of cars with a variety of options so the occupied holes will be different from car to car. There might be...

Q: Fuel pump relay issue. 2000 Buick LeSabre

Hi there - the first rule of modifications is that when things stop working, you revert to the condition before the last change. In this case, remove power to the new stereo components, recheck your fuel fuses and the pump...

Q: Shaking and stalling during low idling

There are no common issues that would cause this problem - especially with the relatively low mileage. I recommend testing the computer for codes causing the stalling you have. If the computer sees the stall, it should set a code...

Related articles

How Do Power Car Windows Increase Passenger Safety?
Power windows are responsible for approximately 2,000 emergency room visits every year. When a power window closes, it exerts enough force to bruise or break bones, crush fingers, or restrict an airway. Though...
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...
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...