Question about 1994 Isuzu Pickup

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Why are there 4 ports on my mechanical fuel pump, and where do I connect each port?

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Pull, push, and vent.

Posted on Jul 14, 2009

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1 Answer

2004 olds alero. new fuel filter and plugs. still wont start.


Did you check for spark at any ot the spark plug wires/ coils? If there is, check for fuel pressure at the fuel rail. Take the port cap off and connect a fuel pressure gauge. If one is not available, with a pocket screw driver deppress valve at port and observe if fuel pours out. If no fuel comes out at all, check your fuel pump circuit. Check for good ground and power at fuel pump connector. If power/ground are ok, replace fuel pump. If spark and good fuel pressure is present, there is the possibility of engine mechanical issues(jumped) timing chain). Also, a plugged catalitic wont let engine start but its very unlikely thats your problem. Start with your basics: spark, fuel, engine mechanical and catalitic.

Feb 07, 2016 | 2004 Oldsmobile Alero

1 Answer

Where do you check the fuel pressure


The Neon don't have fuel gauge port. And is expensive to buy the right adapter. Your mechanic will have the right adapter. Disconnect the supply line and connect adapter . Turn ignition ON and check for leack. You need 58psi.pressure
Good luck

Jun 30, 2014 | 2005 Dodge Neon

1 Answer

I have a 2002 isuzu rodeo 3.1 liter v6 and I try to start it and it tries to start but turns off. I also don't hear the fuel pump turn on every time I turn my key. Could it be just the fuel filter or is it...


It could be either one, if the fuel pressure is too low.
Try this, as a rough test of fuel pressure. On the engine on the fuel rail is a test port to connect a fuel pressure gauge. It looks like a tire valve, may have a cap on it that unscrews. Follow your fuel lines to the top of the engine-they will connect to the fuel rail -where the injectors are. If you find the test port, use a small screwdriver or little punch type of thing: be careful of gas spraying out, don't hold your head over the test port: you want to press in the center little valve and see if gas spurts up out of the valve, with the ignition key in on, not start. If gas spurts up, you know the pump is working well enough to get gas up to the engine. The fuel pressure on multi port injection is quite high, about 50 psi. You would need to check what Isuzu calls for. It really would be best to rent a fuel pressure tester, if possible, and connect it at that test port, turn the key to on, and see what pressure you have. If the pressure is as called for, then you know the pump and filter is okay, and can look elsewhere for the problem.
"...tries to start, but turns off..." you mean it does fire and try to run for a second? That does sound like it may be a fuel problem.

Dec 31, 2013 | Cars & Trucks

1 Answer

Drain gas on 2000 Windstar


You can try this: The fuel rail on some engines has a convenient port to remove your fuel from your vehicle. Generally used as a test port for pressure, the port has a removable valve core similar to a tire stem. When removed you can put a gas hose over the port and use a clamp to snug the hose on the engine. Then put the other end into a container.
You can try turning the Ignition key to ON and see if the fuel pump will give you any flow. It may be necessary to remove the fuel pump Relay and jump the terminals to improve pump action.
I removed 17 gallons of fuel from a clogged fuel tank using the above method in less than 15 minutes.
You can get Relay diagrams on the Internet, sometimes Autozone, with registering on their site and a lot of scrolling through features in the Help section at the bottom of their page.
I want to say that the terminals under the Relay are numbered and connecting #27 and #34 with a wire loop will directly power the fuel pump. But verify as some Relays have different terminals.

May 22, 2013 | 2000 Ford Windstar

1 Answer

2008 sienna, How do you check a fuel pump with no test port for fuel pressure check on the vehicle.


No solution here, but wondering what your next step was...I think the same thing happened to me, but wanted to check the fuse at least before I have my van towed to some mechanic in Italy. Did you locate the fuse? Which box and was it labeled something other than fuel pump?

Apr 19, 2013 | 2008 Toyota Sienna

1 Answer

Sounds like the fuel pump is going or gone out and it trys to start but it wont turn all the way over


By what your stating, that it starts and dies every time, It seems to be fuel related. You need to perform a fuel pressure check. You will need a pressure tester, one that would at least be able to read pressure to a maximum of 150 lbs of pressure. Although you really only need about 50-60 pounds of pressure to maintain proper fuel injector operation. There is a test port located on the fuel rail where you would conect the pressure tester. The test port is usually located on the drivers side of the engine near the rear section coming up from the firewall. Unscrew the pressure port cap if its still there and connect your tester. But also keep in mind you may have fuel pressure of some sort in the rail so be careful. While the tester is screwed to the test port you want to cycle the ignition key on and read pressure, you may want to repeat this several times. You must have at least 50 pounds of pressure, if so it should start. If you are losing pressure while your maintaining a visual check on the tester it could also be a faulty pressure regulator/fuel pump or even a rubber hose connection inside the fuel tank that connects the fuel pump to the fuel line. If you have any questions Im here to help. Thanks for using FIXYA

Feb 22, 2011 | 1996 Chevrolet Cavalier

3 Answers

Cleaning the gas tank


Clean it how? Why? Removing the tank is usually a simple process, remove the connecting hoses that go forward, release the 2 straps the hold the tank up, there are usually 2 half inch or 14mm nuts holding the clamps 1 on each, and lower the tank. having told you all of this there is no cleaning solution you can use inside the tank to clean and the worst thing you could possibly do is put water in the tank to clean it. In fact, if the fuel pump isn't located in the tank there is only going to be a 2 1/2 " hole where fuel is added to the tank and the line connections to access the tank. Good Luck.

Sep 09, 2009 | Cars & Trucks

1 Answer

Can I remove the fuel gauge from another complete fuel pump assembly and put it on my fuel pump assembly? That is all that is wrong with my fuel pump assembly and a mechanic gave me a used fuel pump a


Yes, if it is mounted to the tank the same way and is from the same type fuel injection system. By same type I mean "port fuel injection" or "throttle body injection". Your system is "port fuel injection" so the used one has to be from a "port fuel injection" system. Also is the tank that the used one is coming out of the same size as yours? If it doesn't hold the same amount of gallons the gas gauge might be wrong. Make sure the the electrical connectors are the same on both assy"s. Hope this helps you out. Good luck.

May 18, 2009 | 2000 Dodge Ram 1500 Truck

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