How to test the fuel pump in a mini van?

This is due to the fact that GM has included a Schrader valve on the fuel rail to which you and I can attach a fuel pressure gauge to. Using a fuel pressure gauge to make sure that enough fuel is reaching the fuel injectors is the most accurate way to diagnose the fuel pump in your car or mini-van.

Can a bad fuel pump make a car not start?

A bad fuel pump will make your 3.1L or 3.4L Venture (or Malibu, Regal, Skylark, Corsica, Impala, Venture, etc.) crank but not start. Here are some more specific symptoms: All of the coil packs, sitting on top of the ignition control module, are creating and delivering spark to the spark plugs.

What causes no start on a GM 3.1L?

I’m going to show you two different methods to verify if the no start condition on your 3.1L or 3.4L GM vehicle is due to a lack of fuel, which usually means that the fuel pump has gone bad. One method involves using just starting fluid and the other involves using a fuel pressure gauge.

How much does a GM fuel pump cost?

As mentioned earlier (in fuel pump test 2), in all of the GM 3.1L and 3.4L V6 equipped vehicles GM was kind enough to put a Schrader valve on the fuel injector rail where you can tap into the fuel system and check its performance. A fuel pressure gauge can cost you as little as $40 (US) or as much as $200 (US).

How do you test a bad fuel pump?

Removing the fuel line that connects to the fuel injector rail (this is the one that delivers fuel from the fuel filter) and place it in a container. When ready, have your helper bump the starter motor while you verify if fuel comes out or not. No fuel coming out of the fuel line further confirms a bad fuel pump.

Where is the universal fuel pump on a car?

A universal electric fuel pump can usually be mounted to the frame and wired to your ignition circuit to pressurize the fuel system as soon as you turn your key. This helps your vehicle start more quickly than relying on a mechanical fuel pump operated by turning the engine over.

Where is the test point for a fuel pump?

Hook the pressure gauge to the fuel pump test fitting. Locate your fuel pump test point, which is usually near the fuel injectors, and locate the point at which the pump hooks up with the filter injector rail. There should be a separation joint or a test port, where the pressure gauge attaches.

What should I do if my fuel pump is low?

The pressure should hold continuously throughout the test. If the fuel pressure is low under load or while idling the fuel filter (if equipped) could be clogged, or the fuel pump has failed and needs replacement. Remove the fuel pressure gauge and reinstall the dust cap or remove the fuel line adaptor clean up any excess fuel. Watch the video!

How can I check the voltage of my fuel pump?

Check the voltage at the pump itself. Just because you’re getting juice from the circuit doesn’t mean that it’s getting to the pump itself, which makes it important to check the voltage there as well. Check out your vehicle’s service manual to find out where to check and the proper procedure for checking it.

How can I check if my fuel pump is working?

Before you check your fuel pump, find the fuse that corresponds to the pump and pull it out to see if it is broken or burned. If it looks fine, check the voltage at the pump itself to make sure the charge that’s leaving the fuse gets to the pump. If this looks alright, then perform a fuel pressure test.

Where to put a fuel pump in a car?

So, you want to install it close to the gas tank for optimal performance. Mounting the fuel line close to heat sources: Fuel and heat don’t mix (at least outside of the engine). Keep the pump and fuel line away from the exhaust and other heated areas.

How to install an electric fuel pump in your classic Chevy?

How to Install an Electric Fuel Pump in Your Classic Chevy 1 Upgrade Options. The first step is deciding what you want to do with the mechanical pump. Leave the mechanical pump… 2 Parts You’ll Need. 3 Mistakes to Avoid While Installing Your Electric Fuel Pump. Electric fuel pumps are reliable. Heck, every new car has… More

How to test the fuel pump no start test?

One method involves using just starting fluid and the other involves using a fuel pressure gauge. One method is a very accurate way of diagnosing a lack of fuel condition causing a no start. The other method is not that accurate. I’ve used both methods successfully and I’ll describe them in a step-by-step way in this tutorial.

When do you turn on the Ignition do you hear the fuel pump?

Also, you should be able to HEAR the fuel pump run for those two seconds when you first turn on the ignition. If you don’t, it is either the fuse (unlikely), the fuel pump relay (unlikely) or the pump itself. If you DO hear the pump for those two seconds, and it won’t start, then there is a good chance it is the fuel pump.