Question about 1999 Jeep Grand Cherokee

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Fuel pressure rail

4.0 litre engine .when engine is idle for ten minute it goes off

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  • yadayada
    yadayada May 11, 2010

    Kinda unclear what you are asking, what does this have to do with the fuel rail?

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Is remote start avtivated?

Posted on Nov 11, 2008

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97 lincoln missfire when warm. Especially going uphill. Rund fine until engine warm about ten minutes from starting. Changed all coils.


Sounds like fuel pressure is too low-either a weak , old pump, or you need to change the fuel filter-most likely, the pump, though. Check the fuel pressure specification for your car, most mpfi systems require 40-50 lbs. of pressure.

May 05, 2013 | Cars & Trucks

1 Answer

I have a Nissan Maxima QX 1996 model. Only in the morning (but the weather is already hot!) at the first time I tried the engine is not starting... Battery and starter motor is working for minutes and...


You migh have an Injector leak down problem, the fuel rail goes empty and while you keep cranking the fuel rail fills up building pressure and then the engine starts, this normally happens if the vehicle is parked for more then 3-4 hours.

Aug 11, 2011 | 1996 Nissan Maxima

3 Answers

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...


Hi.

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.


ginko_260.gif



Regards.

Ginko

Aug 04, 2011 | 1999 Jeep Grand Cherokee

1 Answer

Tourqe specs for 2.8 liter motor.


Camshaft Sprocket: 15-20ftlbs
Camshaft Rear Cover: 6-9ftlbs
Torsional Dampener: 67-85ftlbs
Exhaust Manifold: 15-23ftlbs
Water Pump: 6-9ftlbs
Thermostat Housing: 15-23ftlbs
Intake Manifold: 23ftlbs
Timing Chain Dampener: 14-19ftlbs
Rocker Arm Cover: 6-9ftlbs
Rock Arm Nuts: 15-20ftlbs
Oil Pan: 15-23ftlbs(M8 Bolts) 6-9ftlbs(M6 Bolts)
Main Bearing Caps: 63-83ftlbs
Connecting Rod Main Cap: 34-40ftlbs
Cylinder Heads: 33ftlbs(+ an additional 1/4 Turn)
Engine Mounts: 34ftlbs
Oil Filter Adapter to Engine: 34ftlbs
Oil Filter Adapter Bolt: 63ftlbs
Oil Pressure Switch: 10ftlbs
Oil Pump Drive Bolt: 25ftlbs
Oil Pump Mounting Bolts: 30ftlbs
EGR Valve: 19ftlbs
EGR Tube Nut: 19ftlbs
Fuel Line Nuts: 17ftlbs
Fuel Rail Attaching Bolts: 88in.lbs
Fuel Rail Inlet Fitting: 35ftlbs
Fuel Rail Mounting Bracket: 28in.lbs
Fuel Rail Outlet Fitting: 30ftlbs
Fuel Pressure Connector: 88in.lbs
Fuel Pressure Regulator Bracket: 28in.lbs
Idle Air Control Valve: 30in.lbs
Idle Air/Vacuum Signal Housing: 30in.lbs
Intake Air Plenum Bolts: 16ftlbs
Thorottle Body Attaching Bolts: 18ftlbs
Throttle Position Sensor: 18in.lbs
Crankshaft Sensor: 71in.lbs
DIS Assembly to Block: 15-22ftlbs
Knock Sensor: 14ftlbs

Dec 15, 2010 | 1989 Chevrolet Celebrity

1 Answer

Engine idles erractically.1990 Olds Cutlass Ciera, 3.3 L engine


purchase a fuel pressure tester and screw it on to the fuel rail schrader valve access point turn key on there should be 30 - 40 lbs. of pressure present if not either the fuel pressure regulator is bad ( located near fuel rail) or the fuel pump has become weak.

Sep 11, 2009 | 1990 Oldsmobile Cutlass Ciera

1 Answer

1998 ford winstar 3 litre keeps stalling new fuel pump ,new filter , pressure at rail, no codes, have spark any ideas? thanks


WELL THIS VAN HAS MANY ISUSES NEED TO JECK FOR VACUME LEAK AT IN TAKE AND THE PLENUM IF ITS PLASTICK THEY TEN TO CRACK OR THEY HAVE GASKET FAILER VERY COMEN ON THIS CAR OR YOU MAY NEED TO CHECK EGR VALVE IF STUCK OPEN IT WONT IDLE THEN YOU HAVE THE IAC VALVE IDLE AIR CONTROL VALVE YOU CAN USE BRAKE CLEAN AROUND IN TAKE BUT BE VERY CARFULL FLAMIBAL SHOULD HAVE FIRE EXTINGSHER NEAR YOOU WHEN DOING THIS

Aug 19, 2009 | Ford Windstar Cars & Trucks

1 Answer

04 jeep wrangler hard to start, runs fine when running.


does it have a vacuum controlled fuel pressure regulator, if so check it for leaks into the intake. Also check fuel pressure

Feb 27, 2009 | 2005 Jeep Wrangler

1 Answer

1999 jeep c. 4.0 litre engine. Fuel drips from muffler wont start


How is this car running? Remove the vacuum line from the pressure regulator on the fuel rail and check to see if there is any gas coming out of the line. If you see gas then the regulator is bad.

Dec 13, 2008 | 1999 Jeep Cherokee 4WD

1 Answer

4.0 litre engine, auto transmission, long cranking time before it starts. When it starts there is a smell of gsoline, rich.


CHECK INJECTOR LEAK DOWN. INSTALL FUEL PRESSURE GAUGE, PRESSURIZE FUEL SYSTEM BY LETTING ENGINE RUN FOR A MINUTE, SHUT ENGINE DOWN, AND OBSERVE FUEL PRESSURE. IT SHOULD NOT DROP BY MORE THAN 15-20 PSI IN A HALF HOUR. IF IT DOES PRESSURIZE FUEL RAIL AGAIN AND REMOVE FUEL RAIL WITH INJECTORS STILL ATTACHED AND LOOK FOR FUEL DRIPPING OUT OF INJECTORS. IF FUEL IS DRIPPING REPLACE INJECTORS AND SEALS.

Aug 12, 2008 | 1996 Jeep Cherokee Sport

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