Question about 1999 Nissan Quest
Hi, your fuel pump may be failing. You can check the pump by removing the clamp from where the fuel line attaches to the fuel rail. Pull the hose off to see if there is fuel pressure there. If no pressure, check to see if you can hear the pump coming on when you turn the key on. If the pump is coming on, it's probably bad, but you may want to try cahanging the filter before getting a new pump. If the pump is not coming on, try checking the pump fuse first, then try swapping the fuel pump relay to see if it will come on. Please get back to me if you have any questions, and thanks for using FixYa.
Posted on Mar 25, 2011
How to diagnosis an electric fuel pump on a gasoline vehicle. Also .do a google search for how to on your specific vehicle
1 Check Fuel Pump Fuse (Read owners manual for locations)
2 Verify fuel pump safety switch (crash shut off) is pushed in (12 volts should go in and out side of this switch)
3 Have assistant ready in drivers seat
4 Open fuel cap, stick a LARGE (so it can't fall through the hole) screw driver in the opening to hold the flap open
5 Wait for area to be silent no loud noise within 500'
6 Hold your ear close to the fuel cap opening (pump is in the fuel tank on all newer fuel injected cars & trucks
7 Tell assistant to turn key to ON position(Do NOT start now)If you start engine too much noise to hear pump.
8 If the ele fuel pump is working you will hear it make a faint but aubible smooth buzz sound for about 3 seconds then stop by its self. (All newer gas fuel injected vehicles are made this way, and the reason the pump only runs 3 seconds is if the engine computer does'nt sense that the engine is running the computer turns off the pump after 3 sec for safety and because the fuel pressure will build up in less than 3 seconds)
8A If you hear a rough intermittent sound pump is probably going bad
8B If no sound probably bad pump (If in doubt do the test on a known good vehicle to see what a good pump sounds like, all are similar sound if good)
9 Verify battery charg is full and check for 12volts at the wires to the pump for the 3 seconsds in above test pump is bad Also make sure wiring connections at pump are not corroded
10 BEFORE Replacing pump verify 12 volts at pump wires or else you may be replacing a good pump that has broken and or corroded wiring.
11 Remove fuel from tank , after disconnecting all hoses wires by remove fuel use floor jack to hold and a piece of strong plywood ,remove straps lower slowly verifying connections on top of tank are disconnected . follow instructions that come with new pump/pump and fuel gage sensor. this job can take 2 people 6-8 hours if you never did this before
do a google search for how to on your specific vehicle for more info if needed
Posted on Feb 04, 2012
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Posted on Jan 02, 2017
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