Question about 1999 Pontiac Firebird

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Car has spark but no fuel pressure, cannot locate fuel pump relay to check it.

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Fuel pump relay is under the hood. if its not the relay it could be the fuel presure sensor.

Posted on Jan 30, 2010

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Everything has been checked ok but my subaru forester wont start. Engine cranks but car wont start. Is it a fuel pump problem?


Lets find out
  1. pull spark plug any one hold about 1/4 inch from engine block(with insulated pliers) and have someone crank the car. You should see a spark jump across to the engine repeatedly . if so ing system is ok
  2. You don't sat the year so pull the fuel line off where it enters the carb, throttle body or injectors whichever you have. put end in a jar crank eng just a little . if fuel squirts up into the jar pump is ok. should be a lot.
  3. This will tell you which system is causing the problem
Hope this helps Mike

Mar 01, 2016 | Subaru Cars & Trucks

Tip

Car Won' Start


Car won't start?
First thing would be to check all your fuses. Most fuse boxes are located under the driver side dash panel. Some cars do have an extra set of fuses on passenger side kick panel (foot area on door side)
If all fuses are good, then next thing would be to test your relays with an ohmmeter.
If all your your relays and fuses are good, you will want to check for fuel and spark. A car needs air, fuel and spark to run.
To check for spark, you can purchase and use a spark tester.
If you cannot obtain a spark tester, then the next best thing would be an ohmmeter. You can test the power coming from your coil packs or distributor depending on what you have. On distributorless vehicles (one with coil packs) the coil pack are attached to an ignition module. This module is powered by the Crankshaft Position Sensor. This sensor can be tested with an ohmmeter. The Crankshaft Position Sensor is the first thing to be tested if you have no spark in any cylinder. If you have spark in some cylinders but not all, then check the coil pack (1 pack per 2 cylinders).
If you have a distributor, test the coil that provides the spark.
If you have plenty of good strong spark, then the next step would be to check for fuel.
Fuel system consists of Fuel Tank, Fuel Pump, Fuel pump Relay, Fuel Filter, Fuel Pressure Regulator and finally carberator or injectors.
Fuel injected systems have a fuel rail. On the fuel rail is a test port for fuel pressure. If you have a fuel pressure tester you can test how much fuel pressure you have. Or you can place a rag over the valve and press it in to see if there is pressure. If not pressure, check that pump is running. You should hear it run for a few seconds when key is first placed in the ON position. If pump is not running, check fuses and pump relay.
If pump is running but fuel pressure is low, check for leaks, plugged fuel filter, or leaky injector.
If your check engine light is on, then you likely have a faulty sensor or circuit and should have the engine codes read with a code reader/scanner to pinpoint exact problem area.

For more info, ask an expert at www.fixya.com

on Mar 25, 2010 | Alfa Romeo 164 Cars & Trucks

Tip

Car won't start? First thing would be to check all your fuses. Most fuse boxes...


Car won't start?
First thing would be to check all your fuses. Most fuse boxes are located under the driver side dash panel. Some cars do have an extra set of fuses on passenger side kick panel (foot area on door side)

If all fuses are good, then next thing would be to test your relays with an ohmmeter.

If all your your relays and fuses are good, you will want to check for fuel and spark. A car needs air, fuel and spark to run.

To check for spark, you can purchase and use a spark tester.
If you cannot obtain a spark tester, then the next best thing would be an ohmmeter. You can test the power coming from your coil packs or distributor depending on what you have. On distributorless vehicles (one with coil packs) the coil pack are attached to an ignition module. This module is powered by the Crankshaft Position Sensor. This sensor can be tested with an ohmmeter. The Crankshaft Position Sensor is the first thing to be tested if you have no spark in any cylinder. If you have spark in some cylinders but not all, then check the coil pack (1 pack per 2 cylinders).

If you have a distributor, test the coil that provides the spark.

If you have plenty of good strong spark, then the next step would be to check for fuel.
Fuel system consists of Fuel Tank, Fuel Pump, Fuel pump Relay, Fuel Filter, Fuel Pressure Regulator and finally carberator or injectors.

Fuel injected systems have a fuel rail. On the fuel rail is a test port for fuel pressure. If you have a fuel pressure tester you can test how much fuel pressure you have. Or you can place a rag over the valve and press it in to see if there is pressure. If not pressure, check that pump is running. You should hear it run for a few seconds when key is first placed in the ON position. If pump is not running, check fuses and pump relay.
If pump is running but fuel pressure is low, check for leaks, plugged fuel filter, or leaky injector.

on Mar 25, 2010 | 1999 Saturn SL

1 Answer

Car is turning over but wont start seems like gas problem


Listen for the 2 second hum or buzz from the gas tank, when you turn the key to on, not start. The pump should run for about 2 seconds to put pressure in the lines and up to the fuel rail. If you don't hear it, first check the fuel pump fuse, usually in the under hood fuse/relay center. Or you could check for fuel pressure at the testing port-shrader valve- on the fuel rail. If you punch the center valve down with a small screwdriver, gas should try to spurt out. If no pressure, the pump is bad or the wiring to it needs to be investigated. Power flows from the battery to the fuse to the fuel pump relay and then to the gas tank. The relay is turned on by the pcm and allows the relay to pass power on to the pump.

Many parts stores rent or loan fuel pressure gauges to check your fuel pressure. The correct pressure is critical for the injectors to work right. If the car won't start, check fuel pressure and check for spark. Usually gas or spark is the problem.

Mar 11, 2015 | Cars & Trucks

1 Answer

My nissan armada is stalling and spitting and sputtering


1) spark plugs
2) Ignition coils
3) Low fuel pressure, bad Fuel filter (it's inside fuel tank with Fuel pump)
4) Low Fuel pressure, damaged fuel pump (inside fuel pump)
5) check for Fuel Pump Relay on PDMI. There are several issues with that relay. You can swap with fog light relay (its located also on PDMI) to check for damage.

Jun 13, 2014 | Nissan Armada Cars & Trucks

Tip

Car won't start? First thing would be to check all your fuses. Most fuse boxes...


Car won't start?
First thing would be to check all your fuses. Most fuse boxes are located under the driver side dash panel. Some cars do have an extra set of fuses on passenger side kick panel (foot area on door side)

If all fuses are good, then next thing would be to test your relays with an ohmmeter.

If all your your relays and fuses are good, you will want to check for fuel and spark. A car needs air, fuel and spark to run.

To check for spark, you can purchase and use a spark tester.
If you cannot obtain a spark tester, then the next best thing would be an ohmmeter. You can test the power coming from your coil packs or distributor depending on what you have. On distributorless vehicles (one with coil packs) the coil pack are attached to an ignition module. This module is powered by the Crankshaft Position Sensor. This sensor can be tested with an ohmmeter. The Crankshaft Position Sensor is the first thing to be tested if you have no spark in any cylinder. If you have spark in some cylinders but not all, then check the coil pack (1 pack per 2 cylinders).

If you have a distributor, test the coil that provides the spark.

If you have plenty of good strong spark, then the next step would be to check for fuel.
Fuel system consists of Fuel Tank, Fuel Pump, Fuel pump Relay, Fuel Filter, Fuel Pressure Regulator and finally carberator or injectors.

Fuel injected systems have a fuel rail. On the fuel rail is a test port for fuel pressure. If you have a fuel pressure tester you can test how much fuel pressure you have. Or you can place a rag over the valve and press it in to see if there is pressure. If not pressure, check that pump is running. You should hear it run for a few seconds when key is first placed in the ON position. If pump is not running, check fuses and pump relay.
If pump is running but fuel pressure is low, check for leaks, plugged fuel filter, or leaky injector.

on Mar 25, 2010 | Acura CL Cars & Trucks

1 Answer

Why is my nissan armada is stalling and spitting and sputtering


1) spark plugs
2) Ignition coils
3) Low fuel pressure, bad Fuel filter (it's inside fuel tank with Fuel pump)
4) Low Fuel pressure, damaged fuel pump (inside fuel pump)
5) check for Fuel Pump Relay on PDMI. There are several issues with that relay. You can swap with fog light relay (its located also on PDMI) to check for damage.

Jun 13, 2014 | Nissan Armada Cars & Trucks

1 Answer

2000 mercury grand marquis 4.6 Intermittent problem. 35,000. miles. Problem engine died several times wile driving. Also after car is parked from a drive will not start. Found that the fuel pump is not...


I'd have to test when problem is ongoing. When you first turn on key, no crank, you should hear the pump run for a few seconds then stop. For initial prime, the computer doesn't need rpm signal. Engine cranking, the computer needs to see rpm signal or it won't ground the fuel pump relay. W/o rpm signal, no spark at the plugs and no fuel injector pulse. I know your talking about fuel, but, when problem is ongoing, check spark and fuel injector pulse, engine cranking.
Intermittent problems are a pain, have to test when problem is ongoing.
mercury fuel pump-i4kx0gxqalhdz4ok10irisui-5-0.jpg

Feb 27, 2017 | 2006 Mercury Grand Marquis

1 Answer

Xterra car quit running. had no spark @ distributor. replaced crank sensor and got spark. no gas pressure. replaced fuel pump, new one do not work. no power to it. checked fuses/relays, no luck. ran...


Yes, there is fuel pump relay, which is generally located on the passenger side kick panel. But in your case, the fuel pump relay on 2002 model Xterra is indeed located under the dash around the steering wheel, but no you don't need to remove the cover just lay in floor and you can see it, it will slide off a bracket and you can remove and replace it.
Good Luck!

Jan 15, 2011 | 2002 Nissan Xterra

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