Question about 2000 Jeep Grand Cherokee

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2000 jeep cherokee hard to start

My jeep [2000 4.0] has a hard time starting ,installed new fuel pump,plugs ,oil clean ,battery good ,clamps clean,tight car runs fine once started / in hot weather problem worse,used techron,jeep dealer,local garage checked codes ,ok
need help thanks
J

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  • Master
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Hi moondoggy312

This could be vapor lock which is what happens if it is really hot outside, the gas evaporates in the lines and doesn't reach the engine as easily. Is it usually humid or dry when this happens? May I also ask where you live and what temperature that you believe is hot as hot is relative. thanks. Will be waiting for the reply

bestdarngood

Posted on Jan 07, 2009

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  • Jeep Master
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1st are u using the recommended octane fuel? using premium in a car designed for 87 octane regular will cause hard starting when cold, ( prem 91 octane burns slower) the other thing is carbon on the back of the valve heads, the carbon soaks up fuel and makes for long crank times, and last have the injectors been cleaned with a professional high pressure cleaning rig like the dealer would use? poor fuel spray/dribbling injectors cause long crank and hard start. last but no least have u checked for any trouble codes in the engine control computer, Kragen does this for free as well as other parts stores like Kragen. I worked as a electronic engine control master tech for 10 years and these are the most common issues

Posted on Jan 07, 2009

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Is slow to turn over .. or is it cranking long before starting

Posted on Jan 07, 2009

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Im searching for the location of my fuel filter


searching why, (buy an FSM and no more guessing...? )
basic service?
low fuel pressure? why?

ive got near a 1/2 million + miles on jeeps since 1988.
never stranded, but i do my service,.
my last chick-o-dee. was 99. with 5sp, all with that.
my 08 JK same.
the fuel filters on old loop systems is in the front of the tank
then later, , EPA forced most parts into tank with the new loop
or dead head systems. (EPA wants fuel cold .so, that is it)
i dont find parts hard to find, jeeps excel at that. vast resources.
nor hard electrical if you had a 2007+ then that be different.

id just crawl under car and gander, at fuel line but here we go
ill do it , online for you.
4Liter 98
options , with the 20gallon tank there is filter. on top of pump , in tank.
that means to me there are different filters there. by size tank .
if you dont see a filter, that means its in the tank.
at
http://www.factorychryslerparts.com/productSearch.aspx?&ukey_make=1064&modelYear=1998&ukey_model=15525&ukey_trimLevel=0&ukey_driveline=0&ukey_Category=0&numResults=50&sortOrder=Relevance&isOnSale=0&isAccessory=0&isPerformance=0&searchTerm=

so

ill paste the FSM page on this topic

he fuel filter is an integral component of the fuel pressure regulator, which is mounted on top of the fuel pump module, located in the fuel tank. When the fuel filter/regulator assembly requires service, the fuel tank must be removed from the vehicle, however, the fuel pump module does not need to be removed.
  1. Disconnect the battery ground cable.
  2. Relieve the fuel system pressure. Refer to Section 5 for the proper procedure.
  3. Remove the fuel tank assembly.
  4. Clean the area around the fuel filter/regulator.
  5. Disengage the retaining clamp from the top of the filter/regulator assembly. Discard the retaining clamp.
  6. Using 2 small prying tools, pry the filter/regulator assembly out from the top of the fuel pump module. The filter/regulator assembly will unsnap from the fuel pump module.
  7. Remove and discard the mounting gasket below the filter/regulator.
  8. Before discarding the fuel filter/pressure regulator assembly, inspect the assembly to verify that the O-rings are intact. If the smallest of the 2 O-rings cannot be found on the bottom of the filter/regulator, it may be necessary to remove it from the fuel inlet passage in the fuel pump module.
  9. Clean the recessed area in the pump module where the filter/regulator assembly is to be installed.
  10. Check the replacement filter/regulator assembly to make sure that the new O-rings are already installed on the assembly.
  11. Apply a small amount of clean engine oil to the O-rings.
  12. Install a new gasket on top of the fuel pump module.
  13. Press the new fuel filter/pressure regulator assembly into the top of the fuel pump module until it snaps into position (a positive click must be heard or felt).
  14. The arrow on top of the fuel pump module should be pointed towards the front of the vehicle (12 O'clock position).
  15. Turn the filter/regulator assembly until the supply tube (fitting) is pointed to the 11 O'clock position.
  16. Install new retainer clamp (the clamp snaps over the top of the filter/regulator and locks to the flanges on the pump module).
  17. Install the fuel tank assembly.
  18. Connect the negative battery cable.
  19. end

how is that ?

Mar 21, 2014 | 1998 Jeep Grand Cherokee

3 Answers

I have a99 jeep sport Cherokee. I got fuel pump and filter put in last week,because it wouldn't start. The jeep still has a hard time starting. What could it be?


check your Park/neutral position switch (automatic transmission), it may need cleaning or repacement
iiiiiiii
it may need cleaning

May 21, 2012 | 1999 Jeep Cherokee

3 Answers

I have a Jeep grand cherokee laredo and i have installed a new fuel pump and fuel filter but it will not start i have checked all fuses and relays please help.


Having same issue with my 2000 grand cherokee. sometimes fuel pump will prime and car starts the other 50% of time no fuel pump noise only smaller radiator fan will come on and make vibrating whining noise. I have changed out fuel pump and filter as well as checked and ruled out all fuses/relays involved. Need help too

Aug 04, 2010 | 2000 Jeep Grand Cherokee

1 Answer

How to replace a fuel pump on a 1994 jeep grand cherokee?


I'm assuming that your Jeep have a 5.2L V8 engine (as mine), then check this procedure...

Grand Cherokee 5.2L Engines
(see Figure 6)
  1. Disconnect the negative battery cable.
  2. Open the radiator valve and drain the cooling system.
  3. Remove the cooling fan and shroud as an assembly.
  4. Remove the accessory drive belt.
  5. Remove the water pump pulley from the hub.
  6. Disconnect the hoses from the water pump.
  7. Loosen the heater hose coolant return tube mounting bolt and nut and remove the tube. Discard the O-ring.
25b04d0.jpg

Fig. 6: Water pump mounting bolt locations
  1. Remove the water pump mounting bolts.
  2. Loosen the clamp at the water pump end of the bypass hose. Slip the bypass hose from the water pump while removing the pump from the engine. Discard the gasket.
To install:
  1. Clean all gasket mating surfaces.
  2. Guide the water pump and new gasket into position while connecting the bypass hose to the pump. Tighten the water pump bolts to 30 ft. lbs. (40 Nm).
  3. Install the bypass hose clamp.
  4. Spin the water pump to ensure the pump impeller does not rub against the timing chain cover.
  5. Coat a new O-ring with coolant and install it to the heater hose coolant return tube.
  6. Install the coolant return tube to the engine. Ensure the slot in the tube bracket is bottomed to the mounting bolt. This will properly position the return tube.
  7. Connect the radiator hose to the water pump.
  8. Connect the heater hose and clamp to the return tube.
  9. Install the water pump pulley and tighten the bolts to 20 ft. lbs. (27 Nm).
  10. Install the accessory drive belt.
  11. Install the cooling fan and shroud.
  12. Fill the cooling system.
  13. Connect the negative battery cable.
  14. Start the engine and check for leaks.

Other details can find in your repair manual ZJ-Secc-7-Cooling-System

Hope thats help.

May 04, 2010 | 1994 Jeep Grand Cherokee

1 Answer

2000 Jeep Grand cherokee Laredo wont start. Engine turn over . No noise from fuel pump with ignition on. Replaced fuel pump and filter.Turn ignition on- pump did not run.Jumped the fuel pump at the pump...


sounds alot the the pcm it controls the fuel pump and ign system but the anti theft would keep it from starting because the key has a transponder in it programmed for that vehicle and that would kill all ign if triggered

Sep 22, 2009 | 2000 Jeep Grand Cherokee

2 Answers

I have a jeep grand cherokee laredo with the 4.0L inline 6 and it stalls when driving and is also hard to start. the engine turns over, so i know its getting enough juice but it will not start. after...


have you actually had a fuel pressure test done on this Jeep? I had a 93 cherokee limited and i replaced the fuel pumpo but the new one was bad and it wasnt getting enough psi's

Mar 05, 2009 | 1996 Jeep Grand Cherokee

1 Answer

Jeep won;t start..new fuel pump installed


try the fuel filter and make sure you have proper oil pressure!! Remeber if you have tried craking to many bad times then the plugs are going to be fouled out!! Means that they are going to be drowned with gas and need replacing!! Also make sure your fuel pump is coming on!! You should hear a hissin or a hummin noise back from the fuel tank!

Dec 07, 2008 | 1994 Jeep Grand Cherokee

3 Answers

2000 jeep cherokee starts then stalls in approx 3 sec 4.0 has new crank sensor


I am going to assume that it will not run even if you push on the accelerator pedal?
Can you install or attach an old timing light to the spark plug wires, turn it one and try to start it. The light should flash with the engine running, but if it shuts off at time of engine die, and the engine is still spinning, you are losing spark, My suggestion is the cranks shaft sensor on bell housing.
Second, install a pressure gage on the test port on the fuel rail and watch it as you start the engine, fuel pressure should not drop as the engine dies, if it does, the pump is not working correctly. There are two modes of power to that pump, one to start and timed, for only a few seconds to prime the system, and one to run continuously. Find the wires going to the pump at the tank. Connect test light to those wires and watch what happens during crank and at stall, You should not have the pump shut off and the engine dies.
If you have spark, and fuel pump working, when did you last change the filter,,but I put that LAST.
It has to be one or the other of these.
Good Luck

Aug 04, 2008 | 2000 Jeep Cherokee

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