Q: Hard start hot and cold. Fuel pump, or throttle body?

asked by on March 12, 2017

After setting for the night, my car is hard to start, when warmed up, my car is hard to start, is that my throttle or fuel pump?
My car has a manual transmission.

If the throttle body was causing a hard start, then the engine would run with a loss of power all the time. The hard start could be caused by either the fuel pump not holding the fuel in the lines causing the fuel to back flow to the fuel tank or the fuel filter could be plugged up enough to make the engine start hard and then run but only when the computer demands the pump to operate all the time. If you need further assistance with your hard start condition, then seek out a professional, such as one from Your Mechanic, to help you.

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

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

2005 pontiac g6 won't start unless I tap gas pedal and turn key to start at same time.. Also hesitates a bit while driving.

You may have a malfunctioning idle air control valve. By holding the throttle open manually by depressing the accelerator pedal, you are allowing enough air in for the car to start. If the fault is not the idle air control...

My wife's oil cap blew off and oil got all over the engine. Car has no power. When I hook up jumper cables it will rev up but wo

Hi there. This symptom can be cause by a plugged PCV system, or more likely severe blow-by, where combustion gasses blow the oil out of the crankcase and up to the valve covers. This could be cause by broken rings...

Why do my power windows not work? 2005 Buick Century

Hello. There are several things that can cause this. It can be caused by a bad ground connection or an issue with the circuit breaker that supplies power to this circuit. You would need to used a voltage meter to...

Related articles

The Best Used Cars to Buy for Occasional Drivers
Not Not everyone relies on their car on a daily basis. Maybe you aren’t the type that deals with a daily commute, and running from here to there constantly. If that’s the case, you may be looking for a car...
How to Replace a Throttle Body Due to Carbon Build-Up on Most Vehicles
Replacing a throttle body can be challenging, as it involves carefully removing a lot of other parts in the car before reaching the throttle body.
The Best Used Cars to Buy for Highway Driving
Do Do you spend hours each week on the highway for work? Maybe you just live in a very rural area and have to drive for 30 or 45 minutes to get to the grocery store. Whatever the case, your...