Q: crank no start, replaced fuel pump, idles hard and dies on crank then will eventually level out and work, replaced throttle body,

asked by on

Started with crank no start, tested fuel pressure and wasnt getting enough fuel so replaced pump. Now after crank it will idle hard and die several times then will level out and run. Then after a few weeks it would get to crank no start again. let sit for a day or two then it will start. So i replaced the throttle body that has all the sensors for flow. After replacing throttle body it is still idling hard and dieing. Please Help!!!

Hi Sean. Thanks for sending in your question today. Typically a rough idle issue is caused by difficulty in mixing the air and fuel correctly. This is handled by the throttle body, the mass air flow sensor, and delivered through the fuel injectors. Any of these parts could be the source of your problems. It appears based on your description, that you might be chasing possible repairs, instead of correctly identifying the root source of your problems. So, it’s probably going to save you a lot of time and money having a professional mechanic come to your location to complete an onsite inspection.

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. crank no start, replaced fuel pump, idles hard and dies on crank then will eventually level out and work, replaced throttle body,

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: Getting error code P0463.

There is a strong likelihood that you are correct. The vast majority of the time an erratic fuel level is caused by a faulty fuel level sensor. I would recommend you ask for help to have the Check Engine Light...

Q: What does the key out indicator mean?

The key out indicator is located on your instrument panel, and operates with your smart key. When your ignition is in the ACC or ON position, and a door is open, the car will search for a smart key. If...

Q: Engine Overheating after 20-30 minutes. Why?

Hi there. One of the easiest ways to test a water pump is to carefully place your hand on the lower radiator hose while the motor is running. Two things should happen; first, as you suggested, the hose should feel...

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...
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.