Question about 2000 Pontiac Grand Am GT

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How do i check the fuel pressure on my 2.4 engine? It doesn't have a test port on the fuel rail.

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There is a gauge too that you connect the fuel line to then connect to the fuel rail to test the pressure on those types of setups. It's a little harder to do when they don't add that test port but it can be done.

Posted on Jul 10, 2010

  • Jeremiah White
    Jeremiah White Jul 11, 2010

    Where do you get that guage and fuel line at?

  • James Young Jul 11, 2010

    You can get the test kit at Auto Zone. It is one of their loan a tool items.



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Posted on Jan 02, 2017

  • 1 Answer

SOURCE: 1998 pontiac sunfire 2.2 litre fuel pressure check port

You disconnect the fuel supply line at the fuel rail and tee your gauge into it.

Posted on Mar 19, 2009

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SOURCE: low fuel pressure 95 volvo 940 turbo

fuel pump check valve doesn't cause pressure loss, just hard starting cold, the check valve is part of the fuel pump, so to replace the valve u must replace the pump. do not use anything but the orig style pump, here is the part number from THE OE PUMP MAKER AT
DELPHI Part # FE0071 PRICE $124.99

Posted on May 05, 2009

  • 127 Answers

SOURCE: 94 jetta 2.0 manual tran. engine stopped running

Sounds like the fuel filter. It would indicate the correct pressure at idle or maybe even revving. Once the engine is put under a load (highway speeds) it begins to choke. Try replacing the fuel filter.

Posted on Jun 29, 2010

  • 50 Answers

SOURCE: 2.4L 2000 Dodge Stratus, no fuel pressure at fuel

Firstly have u filled up with fuel recently ? Take a sample of fuel make sure u havnt put petrol in by accident seen it done hundreds of time or that u havnt run out of fuel . If that's ok then it could be the fuel metering valve in the pump this will cause incorrect fuel pressures most diesels need 250 bar of fuel pressure to start a blocked fuel filter cauld also cause a non start

Posted on Oct 04, 2010

  • 33 Answers

SOURCE: 2000 dodge stratus 2.4L has no fuel pressure at

check fuses and the fuel pump relay if good have someone turn key in the on position with key off while you listen for the fuel pump to kick on if you dont hear anything pound on the tank with hand while the person turns it over. you might jar it to come on. if not check power to the fuel pump. Also make sure you have gas in it if questionable on how much put 1 gallon in just to be on the safe side. No I am not poking fun I see the simplest things kick our(technicians) behinds

Posted on Oct 05, 2010

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How to check fuel pressure on99 sunfire with 2.2 4 cylender

There is a fuel pressure test port on the top of the engine in the pipe )also called the rail) that sits over and supplies fuel to the fuel injectors. You will need a special test gage to hook up to the test port valve. Below is a picture of a typical GM fuel supply rail and test port.

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How to diagnose afaulty pressure regulator on the fuel rail of a 2005 ford escape

Check the pressure with a fuel pressure gauge connected to the test port on the regulator or on the fuel rail itself. There should be at least 30 psi on the rail with the engine running and the same without the engine running. If the pressure bleeds off when the engine is not running, the check valve in the regulator is leaking down which will make a first start in the morning difficult.

Sep 23, 2014 | Cars & Trucks

1 Answer

How do you test the fuel pressure

is this and EFI car, or CARB engine, 1990 (USA ) is a transition year.
my guess is USA< EFI.
with a fuel pressure gauge,
we do all 6 tests listed in the FSM. book.
but here are 2.
key on cranking presssure.
idling presssure.
if MPI enigne (engine not stated) we check while gunning the throttle.
test 3.
then leak down tests.
and injector balance tests.

with this.

method varies by , 1.6L or 1.8L engines.

some cars have a fuel RAIL, MPI engines there is a test port there.
on some cars the fuel filter has fuel test port.

last but really first, is the engine, which is it>?>>???
those are TOY name,, see that 4A >?
the L01 and LWO are GM names for the the engine
the FE means fuel injected engine.
  • Geo Prizm base model (based on Toyota AE92 chassis) 1989-1997
sadly there is no, fuel rail fitting, (you'd have make one)
the FSM shows removing the fuel filter. output. line
and connection the guage there.
The fuel pressure should read 38-44 psi
key on pressure not running.
RAIL method beats all test. bar none !
and is.
running would be about 5PSI less. from what you got above.
if not a drop running, the FPreg (FPR) is bad. or
you lost vacuum to it. the vacuum of the running engine
drops pressure,.
that is just 2 tests. there are more , ask.
on my cars lackng rail fittings, i add a Schrader valve, (fuel rated)
from summit racing.

any thing you do here, must be rated for 75PSI,
no funky carb lines. hose and what not are going to work. here.

Jun 06, 2014 | 1990 Geo Prizm

2 Answers

How to check fuel pressure 91 geo storm gsi

1.6L DOHC (same way as the ISUZU impulse ) same car.
4XE1 engine twin cam.
has MPI injection with fuel rail, regulator and loop
disconnecting the feed line and stuffing it with guage only does 1 of 5 tests. done on MPI. it does JUST the shut test.
the correct way it to check it at the filter or rail tests ports on most cars.
in some cases you must add it.
they sell banjo fittings with test ports at summit racing dot com.
so the first question on all MPI cars, is , where is the stock fittings.
other cars the rail has a schrader valve or a plugged hole to add one. (test port) did you look first for this?
to test the FPR, unplug the vacuum line running
and pressure will jump up 6 to 10 psi.
this simulates wide open throttle pressure, a key fact in getting full power from engine, i test cranking presssure, idle, 3000rpm
and wot pressures to be sure the PFR is working, not just the pump.

the spec at the rail is.

Late 1986 to 1993 I-TEC MPFI system (after VIN 0908197)
Regulator vacuum line connected-36 psi
Regulator vacuum line disconnected-42.5 to 45 psi

the shunt test can hit 60 pis easy. do so for only 5sec.
as this stresses the pump .

the only rail drawing , shows no fittings (cheap buggers)

not even a cheap plug...

24024302-wtht4tipiqsxmsfaksxjx4vs-4-0.jpg below is the twin cam, 1.6L
buy a TEE feeting, and put it at upper, red arrow.
use clamps rated for fuel injection, not chezzy screw band clamps as seen on carb cars. use the correct parts.
or you will get leak and it will not be pretty,
the filter as at 14 ID. this is the pressure feed side of the loop.
30 to 60psi , so all parts must be rated over 60, psi, (100psi is a nice goal)


now the words directly from the IMPULSE FSM.

  1. Relieve the fuel pressure.
  2. Disconnect the fuel line near the engine and install fuel pressure gauge T-connector in the line.
  3. Connect the fuel pressure gauge to the T-connector.
  4. Start the engine and check the fuel pressure, it should be:
  5. 4XC1-Turbo and DOHC I-Mark, G200Z Impulse: 35.6 psi with the vacuum hose of the pressure regulator disconnected and plugged. 28.4 psi with the vacuum hose connected and at idle.
  6. 4ZC1-Turbo, 4ZD1 Impulse and 4ZE1 engine: 42.6 psi with the vacuum hose at the pressure regulator disconnected and plugged. 35.6 psi with the vacuum hose connected at idle. Disconnect the VSV before checking pressure.
  7. V6 engine: 9.13 psi at the fuel pressure line after the fuel filter.
  8. 4XE1 SOHC and DOHC engine: Flow test, disconnect the hose from the EFI fuel feed line at the engine and place in a suitable container. Apply battery voltage to the fuel pump. Pump should supply 1/4 quart (0.24L) within 15 seconds. Pressure test, connect a pressure gauge in the fuel pressure line after the fuel filter, located at the driver's side frame rail. Disconnect the vacuum hose from the pressure regulator. Apply battery voltage to the pump. After the pump stabilizes, the pressure should be 35-38 psi (245-256 kPa) and hold steady.

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1 Answer

Petrol pump

short answer, in the gastank.
we check fuel pressure at the fuel rail .
if good, the pump is good.
the FSM covers this in vivid details.
or at
The 2TR-FE is a 2.7L I4 gasoline engine. It features DOHC, 16 valves and VVT-i . Its power is 159 hp (119 kW) at 5,200 rpm, and 180 lbf·ft (244 N·m) of torque at 3,800 rpm with redline of 5500 rpm.
this engine?

this is used on our tundra. but that dont help ,as yours may have
different EFI , in your country.
you should get the FSM for your car and your country.
on the trundra we must pull the tank to get the pump out.
draining fuel and lots of labor for nothing...
why do that.
we just attach the fuel pressure gauge at the fuel rail
and check pressure,
in fact we do all 6 tests listed in the FSM.
:shut tests. presssure tests. , and regulator test , and leakdown test.
and injector balance tests.
most can not be done, right back aft as you are working the front.

40.8 to 41.7 psi) idle fuel pressure
5min. leak down test, 147 kPa (1.5 kgf/cm2, 21 psi) or more
data is for tundra of simular engines.
if the rail tap is missing, this works.

some factories save $5 by not having a test port.
this is the first part i buy for all my own cars.
for MPI engines. all.
many cars have a schrader valve present on the rail.
my jeep dont , i must used miller tool, 6539
do research online for your fuel rail needs and adapter.
i must have tool to do the injector balance test.
impossible to do unless you have 2 people. 1 under car
and one at rail.

Feb 06, 2014 | 2007 Toyota Quantum 2.7

1 Answer

How do i check my fuel pressure

At the rear of the engine on top of the intake is a fuel delivery rail to the injectors, in the rail is a fuel pressure test port that looks like a tire fill valve. You need a special test gauge to tap in, you can buy one at most auto parts stores that works with most makes fuel pressure ports.

Jul 04, 2012 | 1991 Ford F150

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1999 Grand Cherokee Limited, 95,000 miles, 6 cyl engine The Jeep stumbles, coughs and almost backfires when slowly accelerating from an idle speed. This occurs during the first 5-10 minutes the vehicle...


If fuel pressure is low and you have already replaced the fuel pump, then the problem is usually the fuel pressure regulator. The pressure regulator is in same assembly with fuel filter. The assembly is located to the fuel tank, bolted to the truck's frame. The pressure is tested connecting a gauge like this : Set Sealey VSE952 to the port on the fuel rail. The pressure on Grand Cherokee must be around 49 psi plus or minus 5 psi. If engine runs but pressure is below 44.2 psi , check for a blockage in fuel supply line between fuel rail and fuel pump module (e.g.kinked line). If the line is not blocked, replace fuel pressure regulator and filter. Test pressure with and without fuel cap on.

Another test to be done is reading pressure, then shutting the engine off with the gauge connected. If pressure goes down too quick, then the regulator is defective. After 5 minutes the pressure should not go below 24 psi. If it does replace the regulator.

If regulator is OK check for leaks at the injectors that can cause fuel pressure drops.To check for injectors leakage clamp off the rubber hose of the pressure gauge tool between fuel rail and the port. If pressure staysr above 24 psi and before was dropping, then a fuel injector or the fuel rail is leaking.

Below a diagram representing the fuel rail and test port. The engines from same years like your six cylinder have the port and rail in the same position.




Aug 04, 2011 | 1999 Jeep Grand Cherokee

1 Answer


The fuel pressure should be 49 psi. On all engines except the 3.0 liter you can check the fuel pressure at the fuel pressure test port located on the fuel rail. On the 3.0 liter engine you can disconnect the quick-connect fuel line fitting at the fuel rail and install a fuel gauge with a (T) fitting and adapters to check fuel pressure. Start the engine and check the fuel pressure. Hope this will help.

May 24, 2010 | 1998 Dodge Caravan

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2000 Malibu Starts then looses fuel pressure I have replaced the fuel pump and the fuel pump relay still same problem

Keep in mind that you have several components there:
- Fuel Pump Sender Assembly,
- Fuel Pressure Regulator,
- Fuel Rail Assembly, and
- Fuel Injectors.

1.- Fuel Pump (Sender Assembly) - TESTING
Refer to the accompanying charts for fuel pump diagnosis and testing.

The fuel injection system remains under pressure, even after the engine has been turned OFF. The fuel system pressure must be relieved before disconnecting any fuel lines. Failure to do so may result in fire and/or personal injury.


Fig. 3.1L engine OBD system check to be done before fuel pump relay circuit diagnosis


Fig. 3.1L engine fuel pump relay circuit diagnosis (1 of 2)


Fig. 3.1L engine fuel pump relay circuit diagnosis (2 of 2)


Fig. View of the fuel pressure test port (Schrader valve)-3.1L engine

A - 3.1L engine fuel system pressure test (1 of 4)
B - 3.1L engine fuel system pressure test (2 of 4)
C - 3.1L engine fuel system pressure test (3 of 4)
D - 3.1L engine fuel system pressure test (4 of 4)


Fig. The fuel pump/fuel sender module assembly is mounted in the fuel tank

Fuel Pressure Regulator - REMOVAL & INSTALLATION

(the fuel pressure regulator, which is located on the fuel rail assembly)

Before removing the fuel regulator assembly, place a clean shop towel under the regulator to catch any fuel drips

  1. Properly relieve the fuel system pressure.
  2. If not done already, disconnect the negative battery cable.
  3. On the 3.1L engine, remove the intake manifold plenum, as outlined in .
  4. On the 2.4L engine, remove the fuel rail. Refer to procedure earlier in this section.
  5. Detach the vacuum line from the regulator.
  6. Place a shop towel under the regulator to catch any fuel that may drip out. Unfasten the fuel pressure regulator retaining screw, then remove the regulator by twisting and pulling it from the fuel rail.
  7. Remove and discard the O-ring seal. Inspect the filter screen for contamination and replace if necessary.
To install:
  1. Prior to assembling the pressure regulator to the fuel rail, lubricate the new rail-to-regulator O-ring seal with clean engine oil.
  2. Place the O-ring on the pressure regulator and install the pressure regulator to the fuel rail.
  3. Install the retainer or coat the regulator mounting screws with an approved thread locking compound and secure the pressure regulator in place. Tighten the mounting screw to 76 inch lbs. (8.5 Nm).
  4. If removed, install the fuel rail assembly to the engine.
WARNING The fuel return pipe must be connected before tightening the regulator retaining screw to prevent the regulator from rotating. Rotation of the regulator could damage the retainer and spacer bracket and lead to a fuel leak at the regulator inlet.
  1. Connect the fuel feed line and return line to the fuel rail assembly, use a backup wrench on the fittings to prevent turning.
  2. Attach the vacuum line to the regulator.
  3. On the 3.1L engine, install the intake manifold plenum.
  4. Connect the negative battery cable. Turn the ignition to the ON position for two seconds, then turn it to the OFF position for ten seconds. Turn again to the ON position and check for fuel leaks.


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Fuel problem on 2003 Suburban 2500; 6.0 engine

There is a fuel test port on fuel rail...on left side of the engine.

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