What is an electronic fuel pump?
An electric fuel pump is used on engines with fuel injection to pump fuel from the gas tank to the injectors. The pump must deliver the fuel under high pressure (typically 30 to 85 psi depending on the application) so the injectors can spray the fuel into the engine.
How does the fuel pump work on a Jeep Wrangler?
Find a fuel replacement for Jeep Wrangler at AutoZone to ensure long-lasting performance from your rugged ride. Your Jeep Wrangler fuel pump uses pressure to send the right amount of gas from the fuel tank to the engine. Changes in pressure lead to inconsistent streams of fuel.
Why does my Jeep Wrangler not start up?
Your Jeep Wrangler fuel pump uses pressure to send the right amount of gas from the fuel tank to the engine. Changes in pressure lead to inconsistent streams of fuel. This fluctuation results in the engine jolting, sputtering, eating up gas or not starting at all.
What happens when the fuel pump is low?
The PCM will still pulse (activate) all 6 fuel injectors. But when the fuel pump sends a lower than normal volume of fuel, your Jeep will start and run but with engine performance problems. You’ll probably see one or more of the following symptoms: Rough idle. Engine starts after extended cranking.
How to test the fuel pump in 2 Tests?
Your fuel pressure gauge should register: 30 to 45 PSI with the Key On Engine Off (KOEO) if the fuel pump is OK. Let’s take a look at what your results mean: CASE 1: If the fuel pressure gauge registered 0 PSI. This confirms that the cause of your 4.0L engine’s no start problem is caused by a lack of fuel.
Find a fuel replacement for Jeep Wrangler at AutoZone to ensure long-lasting performance from your rugged ride. Your Jeep Wrangler fuel pump uses pressure to send the right amount of gas from the fuel tank to the engine. Changes in pressure lead to inconsistent streams of fuel.
Your Jeep Wrangler fuel pump uses pressure to send the right amount of gas from the fuel tank to the engine. Changes in pressure lead to inconsistent streams of fuel. This fluctuation results in the engine jolting, sputtering, eating up gas or not starting at all.
The PCM will still pulse (activate) all 6 fuel injectors. But when the fuel pump sends a lower than normal volume of fuel, your Jeep will start and run but with engine performance problems. You’ll probably see one or more of the following symptoms: Rough idle. Engine starts after extended cranking.
Which is wire is which on a fuel pump?
Pump is brand new. This is actually the 3rd one I’ve put into the Jeep in the last 2 months. I actually had a whole thread about how I got to this point: I’m pretty sure it’s a ground as that’s all that is left that it could be. Any idea which of those wires is the ground so I can eliminate that first off?