Question about 1997 Chevrolet Tahoe

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Fuel pump is only getting 8-10 volts to it, no fuel coming out.

Fuel pump has been replaced. engine will crankl but not start.

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  • john h May 11, 2010

    does the pump pressurize when u turn key to on position not start- in on position u or someone listen for the pump to pressurize the lines if no sound bad pump or connected wrong if yes from the engine fire wall by dist. u will c 2 steel lines follow them to u c what looks like an air valve use a rag around valve to protect eyes and surround area push down on valve stem-if air comes out keep bleeding till u get liquid-gas-if gas present have a pressure gauge put on to check actual pressure pump may b bad

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  • Master
  • 811 Answers

Open gas cap to make sure pump is working, listen for whirling sound, if not check fuse or fuel pump relay

Posted on Sep 12, 2009

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1 Answer

No fuel. pulled off fuel line to carb and cranked engine no fuel coming out. Relay under dash working. No sound at fuel tank when key is turned on. Are there any other fuses or relay for fuel system?


Check for power output at the relay, there should be a pink wire with a black stripe that connects to the fuel pump relay, when the key is turned on it should have 12 volts for a few seconds, then drop to 0 volts. This is the prime function that builds fuel pressure before you start the engine. Even though it clicks it doesn't mean it works - the contacts could be bad. This wire continues straight back to the pump, if it has power there may be a damaged wire between the relay and the pump or a bad pump - the pump is fairly common on these vehicles.

These pumps last longer if you don't run less than 1/4 tank of fuel - keeps them cooler.

Sep 29, 2015 | 1994 Geo Tracker

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I have a 1994 chevy s-10 pick-up. I just replaced the gas tank, sending unit and fuel pump. Still won't start Prior to doing this I tried to drive it last week. It started and ran for about 2 minutes and...


Check the distributor cap and rotor.... If they look originial or if there's any moisture inside the cap, replace both of them.
Make sure that if you do replace them that theres no moisture in the distributor before putting new parts in.

Oct 21, 2013 | Cars & Trucks

1 Answer

Car will turn over but won't start. Through the


No noise from fuel pump when you turn over the car .First thing get voltage at fuel pump relay checked, is there 12 volt to the relay.If no, then problem is again the relay.--------- To reconfirm the problem, try other test, that is remove the relay and by pass the relay terminals with a jumper wire .Then with 12 volt external battery give power to fuel pump connector and see, if the fuel pump starts, then its clear that fuel pump relay is faulty.----------- Also other problem can be fuel pump inertia switch.If the inertia switch is faulty then also fuel pump will not start.-------- The fuel pump relay on a 1995 Ford Explorer is in the power distribution
box, in the engine compartment, driver's side near the firewall.----------
The fuel pump inertia switch is in the right front passenger area
it is below the dash but above the carpet in the right hand corner.--------
Its a push button type inertia switch.
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Fuel Pump Activation
When ignition switch is turned to START position, PCM operates fuel pump relay to provide fuel for starting engine. PCM senses engine speed and shuts off fuel pump by opening ground circuit to fuel pump relay when engine stops or engine speed drops to less than 120 RPM. When ignition switch is in ON position, EEC power relay is energized (contacts closed). Power is provided to fuel pump relay and timer in PCM. Fuel pump receives power through fuel pump relay contacts.
Inertia Fuel Shutoff (IFS) Switch
All models use an electrical interrupt switch in fuel system. During a collision or vehicle rollover, electrical contacts within inertia switch open, shutting off fuel supply to electric fuel pump. Fuel supply is interrupted even when engine is running.
A reset button is located on switch assembly. If electrical circuit trips, vehicle will not restart until switch is reset. Fuel system should be inspected before resetting switch.
IFS switch is located under instrument panel, near right side of transmission hump.
----------- If the fuel pump relay, the inertia switch and fuel pump all checked ok, and fuel pump is working with direct 12 volt source to fuel pump.Then problem relates to computer.The computer (power control module, PCM) is faulty and has to be replaced.--------- This will help.Thanks.Helpmech.

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1 Answer

No fuel coming to the fuel rail. is it a relay, or fuel pump problem


  1. Check the power going to the fuel pump. If it gets around 12 volts when the key is turned to the On position, replace the fuel pump.
  2. If the fuel pump is not getting around 12 volts, check and replace the fuse for the fuel pump.
  3. If the fuse is fine, replace the relay for the fuel pump.

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1 Answer

Fuel pump not coming on,installed new one, white plug that has a yellow wire has 5 volts and ground is ok the 2 wires in the center shows 0


The plug you are referring to is probably the fuel tank pressure sender not the fuel pump. It would be plugged into a black sensor about 2 inches long pushed into a rubber grommet on the fuel bung. The fuel pump connector would have more that 2 wires going to it. most likely a heavy purple wire would be the power to the pump. It has to have 12 volts to it to work. The sender may have 3 wires, 5 volts, ground, and sense. the pump connector would have 12 volts, ground and 5 volts for the fuel gauge sender down in the tank.
If the 12 volts is not there, check the fuel pump relay. it is usually up on the drivers side firewall.
With the key in the on position without starting the engine, you should have 12 volts to the pump for 3 seconds then it will click off. Without cranking the engine you should be able to locate the relay by the clicking sound.
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1 Answer

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does the starter turn the engine good?If it is draging or clicks a lot(the starter)it may have low battery voltage.Replace the fuel pump relay,and if that does not fix the fuel pump problem,replace the pump,checking the fuel pump pressure is the thing to do before replacing it.See if fuel is getting o the injectors,if it is,the problem is in the crankshaft sensor.This is where the injectors get there pulse.

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1 Answer

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Sounds like fuel pump going out. I was told by a friend that the pump can get stuck and that by knocking on the fuel tank or by attempting to start that it can kick the pump out of the bad spot and it will start. But it is a sign that it needs to be replaced.

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1 Answer

Saab 900 1996 wont start spark but no fuel coming through from pump


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