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2002 gran prix stalls at high-speed. Many sensors replaced. Fuel pressure is 55 psi at the fuel rail.

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  • Cars & Trucks Master
  • 1,727 Answers

Fuel pressure at 55 psi sitting still is good but do you know where it is at speed when it breaks down ??? how about exhaust pressure ???

Posted on Dec 28, 2013

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Posted on Jan 02, 2017

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SOURCE: Where is the fuel pressure regulator located on an 2002 f150 v6?

in the center of the motor,in the rear on the fuel rail

Posted on Jan 19, 2009

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SOURCE: how do I change the fuel filter for a 2002 pontiac Gran Prix

Release the fuel pressure by loosening the gas cap, raise and support the car on jack stands,squeeze the plastic tabs on the male end of the connector,and pull the connector apart.Some models have 2 tabs,and others have 1 and the fuel line screwed into the other side.Remove filter mounting bolt,unhook tab from frame and remove filter. when you put in the new filter, make sure the arrow is pointing toward front of engine.On the line with plastic tabs, just push on till you hear a click, then pull on it to make sure it's latched.Don't forget to tighten gas cap.

Posted on Jan 24, 2009

dennymulford
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SOURCE: 1997 GMC TRUCK IS MISSING AT ACCELERATION

timing chain is streched replace chain and gear set

Posted on Feb 24, 2009

GM Elec
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SOURCE: 2002 blazer 4 wheel drive hard to start

If the pressure is slow to rise, you should consider changing the fuel filter if it has not been done in the past 30,000 miles.
Next, disconnect a spark plug and check for spark while engine is cranking. Use a spark tester or old spark plug grounded to the engine block.
Let me know.
Regards,

Posted on Mar 23, 2009

sdrayton35
  • 30 Answers

SOURCE: I'm working on a 2006 E350 with a 5.4L. Lacking

sounds like it could be a cpule things, i would start with replaceing the fuel filter and re-testing if that yeilds no change unplug the fuel presure regulator or if posible temp clap off the return line and check presure again, if it comes up to where it needs to be then replace the regulator. finnaly if none of those things solve it i would be very suspect of your fuel pump modual. good luck! let me know if i can be of further help, please rate my answer take care

Posted on Apr 11, 2012

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08 Chevy Kodiak c4500 duramax desiel i replaced the MAF sensor because the code reader said P0102 now it says P0087 that is the problem but everytime I'm hauling something the engine always decreases its...


DTC P0087: Fuel Rail Pressure (FRP) Too Low

Circuit/System Description
The fuel injection pump supplies high pressure fuel to the fuel injection rails, and then to the fuel injectors through high pressure pipes. The fuel rail pressure (FRP) sensor is a three wire sensor mounted in the right fuel injection rail. The FRP sensor uses a 5-volt reference circuit , a signal circuit, and a low reference circuit to monitor fuel rail pressure. This information is sent to the engine control module (ECM) to assist in the fueling of the engine.

Fuel Pressure Regulator Solenoid Supply Voltage
P0088, P0090
P0088
P0090
P0087, P0191, P2510
Conditions for Setting the DTC
P0087
• The actual FRP is more than 15 MPa (2,176 psi) below the desired FRP.
OR
• The actual FRP is less than 22.5 MPa (3,263 psi).

Action Taken When the DTC Sets
• DTCs P0087 and P0088 are Type A DTCs.
• The ECM commands the engine to operate in the Reduced Engine Power mode.
• The message center displays Reduced Engine Power.

Important: Because of the cleansing properties of the biodiesel, switching from the straight diesel to a biodiesel blend can prematurely restrict the fuel filter with normal deposits in the fuel system. A fuel filter replacement might be required sooner than the recommended interval.
P0087
If DTC P0090, P0168 or P0191 is also set, refer to Diagnostic Trouble Code (DTC) List - Vehicle.
Ignition ON for 90 seconds, verify the scan tool FRP Regulator Command parameter is less than 20 percent.
? If greater than the specified range, replace the ECM.
Attempt to start the engine.
? If the engine does not start, refer to Engine Cranks But Does Not Run.
Install the CH-48027 to the fuel rail service port and slowly increase the engine speed until reaching wide open throttle (WOT). The value should be between 1-4 inches Hg vacuum.
? If more than the specified value, inspect for restricted fuel filter or damaged supply lines.
? If no restriction was found, test for high fuel return flow. Refer to Fuel System Diagnosis - High Pressure Side.
With the engine idling or at an idle, command the fuel pressure control to 180 MPa (26,106 psi) with a scan tool. Observe the Actual Fuel Rail Pressure parameter. The actual fuel pressure should be the same as the commanded pressure.
? If the Actual Fuel Rail Pressure is less than 165 MPa (23,931 psi), refer to Fuel System Diagnosis - High Pressure Side.
Important: If the fuel temperature is near 121°C (250°F) during the duplication of the complaint, or in the Failure Records for this DTC, inspect for a restriction in the fuel cooler air flow or the fuel heater always ON. Refer to Fuel Heater Always On.
Operate the vehicle within the conditions for which the customer complaint occurs while observing the CH-48027 . You may also operate the vehicle within the conditions that you observed in the Freeze Frame/Failure Records.
? If the vacuum was more than 12 inches Hg of vacuum at any time in the operating range, inspect for kinked or restricted fuel supply lines.
Operate the vehicle within the conditions for which the customer complaint occurred. Observe the Actual fuel Rail Pressure and Desired Fuel rail Pressure parameters with a scan tool. Fuel pressures should be the same for both parameters.
? If the Actual Fuel Rail Pressure is less than the Desired Fuel Rail Pressure, refer to Fuel System Diagnosis - High Pressure Side.
? If fuel system tests normal, refer to Diagnostic Aids.

Aug 20, 2017 | Cars & Trucks

1 Answer

High co reading for emission


what rpm or speed, both? which Civic engine????? of the 5
and what country????? we can not guess this... ever.
and no one ever says.. here. 99% true.
why is not easy. 50ways there are.
it's running rich. (we have one good input. this)

but here are the reasons, (not the 50 causes) all the below are tests.
it's misfiring. is rich misfire.
causes: many I'll assume the cars 12v power is 10 to 145v at all times. 13.3v running minimum.
1: low compression on one or more cylinders. 150psi w.o.t is min.
2: bad spark or not timed right. to any cylinders. or all. tests.
3: bad fueling. above must be good (tools used and tests)

now if compression is good. and the EGR main down leak
if spark is good, what causes high HC,
simple misfire.
what causes misfire.
  1. bad spark plugs (ever tune it up? now be the time, huh?)
  2. bad injectors, leaking or clogged. clean em.
  3. fuel pressure too high, 28 is min, max (see end)
  4. you find one injector , NOID lamp test stuck ON.
  5. o2 sensors stuck lean (exhaust leaks)
  6. Fuel pump regulator stuck closed, causing #3
there are 5 engines, (why not state yours.??????0
1.5 L to 3.0L
the fuel pressure is different on all .
40-47 PSI. 1.7L and 2.3L
47-54 PSI on 2.0L and 2.2L
41-48 PSI on 3.0L
and then the exceptions
1-- Except SULEV: 48-55 psi SULEV: 47-54 2 Except SULEV: 47-55 psi SULEV: 48-55 psi
if you read the FSM,, it shows tests at the rail.
fuel pressure.
fuel regulation test.
shut test
injector leak down test.
and the injector balance test.
we do them all, or fail;.
all this is FSM.

do you want us to guess or test?
the latter avoids the 50 guesses. 49 being wrong.$$$$$$$$$$$$$

Feb 24, 2014 | 2001 Honda Civic

2 Answers

Code p0191


P0191 FORD - Fuel Rail Pressure Sensor Circuit Range/Performancexicon.jpghttp://engine-codes.com/p0191_ford.htmlForum CodePossible causes- High fuel pressure
- Low fuel pressure
- Damaged FRP sensor
- Excessive resistance in the circuit
- Low or no fuel
- Wiring harness connector of the fuel pressure sensor
- Fuel Rail Pressure Sensor
- Fuel
- Vacuum leaks

Jul 04, 2012 | 2003 Ford Taurus

2 Answers

I have a 2002 chevy silverado 1500 with 5.7 engine. I have replaced fuel pump,fuel filter,& fuel pressure regulator. still have the same problem of engine losing fuel persure and stalling. Ithen just...


Are you sure its a 5.7L? The didnt make a 5.7L in 2002. what is the 8th, and 10th VIN digit? what is fuel pressure when it runs, and what is pressure when it stalls.? that engine needs 55-62 psi to run. below that it wont.

Sep 13, 2011 | 2002 Chevrolet Silverado 1500

1 Answer

2000 GMC Jimmy, starts up every time, but only runs for 10 seconds then dies. Restarts every time but will not stay running. Replaced fuel pump, fuel filter, CAM position sensor, crank position sensor,...


you say fuel pressure is good, but what is it? what is the fuel pressure when it stalls out? Spec is 60-66 psi and it wont run if its 55 psi. the fuel pump relay should be good if the pump runs. Make sure the ground for the pump is good , G402 should be on left frame rail. you may have had it off to replace the pump? maybe? it may be time to stop guessing and have a repair shop diagnose it for you. You sure have replaced a lot of good parts.

Sep 07, 2011 | 2000 GMC Jimmy

1 Answer

I have a 2000 s-10 blazer 2wd vortec 6 it has been a great truck .Lately it has balked on the road,when in out of gear it will not rev over 2500 rpm,when driving its slow to pick up ,sometimes...


Check fuel pressure wit a guage at schrader valve on fuel rail with key on and engine not running. The pressure needs to be 55 to 61 PSI. If it is less than 55 PSI, replace the fuel pump in gas tank and fuel filter. If it is more than 61 PSI, replace fuel pressure regulator.

Feb 21, 2010 | 2000 Chevrolet Blazer

1 Answer

Sputering so i check fuel rail some gas doesnt want to idle occasionally will start and run then looses pressure and stall


Fill the tank to over 1/2 tank and add Chevron Techron fuel system cleaner

Do a fuel pressure test at the fuel rail.

The PSI should be 55-70 psi (or check the sticker under the hood)


Test fuel pump relay.

Check oil level and oil pressure. Low oil pressure,low oil pressure reading can stop the fuel pump from ran. It's a build in safety feature.

If it start and ran better the add only bottle of RED Iso-heat dry rule out water in fuel.


My bet is a weak fuel pump.

Fuel pump with over 110,000 miles will like to fail in a HOT day.


You are on the right track,

Jul 15, 2009 | 1999 GMC Sierra

2 Answers

1997 saturn sc1 stalls while driving or while sitting for a while and won't start again for about 10 to 15 minutes.


Common description of fuel pump problem on that model.Connect fuel gauge to fitting on fuel rail,drivers side below t/Body,when dies get out and see what fuel preasure is,Should be at about 40 to 45 psi.

Jun 17, 2009 | 1997 Saturn SL

4 Answers

Service engine light on showing code p0089


Diagnostic trouble code P0089 - The ECM commands the Bosch high-pressure fuel pump to deliver a specific fuel rail pressure - that can vary up to 23,000 psi depending on load and speed. The actual pressure is monitored via the fuel rail pressure sensor. If the fuel rail pressure varies more than desired or if commanded fuel pump flow is 100mm3/second or less, DTC P0089 will set.

Corrective action includes measuring the fuel rail pressure using a Tech II scan tool, then compare that to commanded fuel rail pressure with the engine running at 2000 rpm. The difference must be less than 20 Mpa.

A blockage in the fuel tank or plugged fuel filter could cause this fault (excessive vacuum in fuel line). If there is less than 5 in Hg of vacuum when measured at the fuel pressure test port at 3000 rpm, the fuel pressure regulator could be defective, and may need to be replaced. The fuel pressure regulator (FPR) is a sub assembly located on the Bosch high-pressure fuel pump.

Jul 30, 2008 | 1996 Chevrolet Cavalier

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