Question about 1997 Jeep Cherokee

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Dear Sir, I have a 1997 Jeep Cherokee Sport, 6 cylinder 4.0 liter. I recently tried cleaning my throttle body with carb cleaner while the vehicle was running. After spraying a half can of cleaner in the throttle body the engine stated idling vey rough and keeps missing when the engine is under load. I have changed spark plugs and problem has gotten worse. I ran the codes and they indicated that a sensor on the throttle body was bad and number two cylinder was miss firing. The vehicle runs good at 45 mph and above but when I come to a hill or red light it sputters and misses.

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Do a compression check on the engine, and replace the bad sensor, i take the throttle body off to clean it and some sensors are touchy about cleaner, i fear maybe something got on the egr valve pintle

Posted on May 26, 2010

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Fireing order diagram


cylinder firing order is: is 1-5-3-6-2-4 .... In Jeep Grand Cherokee Laredo ...Happy motoring.

Sep 04, 2014 | 1996 Jeep Grand Cherokee

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2000 grand cherokee laredo, 4.7 engine, very rough idle. all cylinders do not seem to be firing (not positive on this). have to play with gas to keep jeep running but has very rough idle.


If your engine light is on, please get a free scan at your local parts chain and send us the trouble codes. Recommend you start by removing the idle air control valve and cleaning the valve and passages as well as the throttle body with carb cleaner. Check the operation of the valve by hooking up the connector and turning on the key (do not start the car) while it is off the engine to see if it actuates. Please let me know if you have questions.

  1. Remove air duct and air resonator box at throttle body.
  2. Disconnect electrical connector from IAC motor (#4 in picture).
  3. Remove two mounting bolts (screws).
  4. Remove IAC motor from throttle body.
  5. clean valve, passages, and throttle body (#2)


jturcotte_292.gif

Nov 25, 2010 | Jeep Grand Cherokee Cars & Trucks

1 Answer

Where is the carb on a jeep grand cherokee 1993 4.0 liter


There is no carburetor on any of the 6 cylinder or 8 cylinder Jeep Grand Cherokees. They have Fuel Injection and a throttle body which looks like a carburetor scaled down.

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Instructions on how to remove and replace the throttle body follow:

Throttle Body REMOVAL & INSTALLATION
  1. Disconnect the negative battery cable.
  2. Remove the vacuum hoses from upper bonnet, unfasten the retaining clips and remove the upper bonnet assembly.
  3. Remove the lower bonnet retaining bolts and lower bonnet.
  4. Remove the throttle cable and the return spring.
  5. Disengage the wire harness connector from the injector.
  6. Disengage the wire harness connector from the WOT switch, ISA motor and TPS.
  7. Disconnect the fuel supply and return lines from the throttle body.
  8. Tag and disengage the vacuum hoses from the throttle body assembly.
  9. Disengage the potentiometer wire connector.
  10. Loosen throttle body retaining bolts and remove throttle body assembly from the intake manifold. To install:
  11. Clean the intake manifold and throttle body mating surfaces of old gasket material.
  12. Install a new gasket and the throttle body assembly. Tighten the mounting bolts to 16 ft. lbs. (21 Nm).
  13. Engage the potentiometer wire connector.
  14. Engage the vacuum hoses to the throttle body.
  15. Engage the fuel lines to the throttle body.
  16. Engage the WOT switch, ISA motor, TPS, and injector electrical connections.
  17. Install the return spring and throttle cable.
  18. Install the lower bonnet and fasten the retainers.
  19. Install the upper bonnet assembly, retaining clips and vacuum hoses.
  20. Connect the negative battery cable.
  21. Start the vehicle and check for fuel leaks. Fig. 1: Exploded view of the throttle body and related components 86745g41.gif
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Aug 17, 2010 | 1993 Jeep Grand Cherokee

2 Answers

My '97 Jeep Grand Cherokee ltd 6 cylinder is giving me fits right now. It stalls backfires losing speed while driving down road then if I pull over and turn off and on sometimes it will be okay. What could...


When was the last time you tuned up your Jeep? Spark plugs, cap and rotor can certainly attribute to if not cause the problem you are describing. Definitely sounds like a fuel problem (too much fuel being dumped in the cylinders.)

Jul 01, 2010 | 1997 Jeep Grand Cherokee

3 Answers

2001 ford explorer sport,6 cylinder,rough idle and stalling....unplugged mass air sensor...seems to idle fine then...can u help me?


If there is a Auto Zone around your area, have them scan the Explorer for any DTC codes since it's fee of charge. But in the mean time buy a can of MAF cleaner and follow the instructions and also buy a can of Trottle body cleaner and follow the instructions on the can. Clean the MAF and the Throttle body, also try to get the Idle Air Control falve cleaned too which is on the throttle body. So use up the whole can of Throttle body cleaner and it would not hurt to use two cans. Once everything is cleaned that should fix the problem, the other thing to that would cause your poor idle and stalling is a bad or dirty EGR valve which can be cleaned with Carburetor cleaner since it's stronger then the Throttle body cleaner, just remove the EGR and spray the Carbon build away and place back in place. Note: the Carb cleaner is to strong for the gaskets used on the throttle body so don't use it on the throttle body. Good luck and this should help get your Explorer running 100% soon.

Jul 09, 2009 | 2001 Ford Explorer Sport

1 Answer

1997 Jeep Cherokee Sport drops idle


EGR VALVE is carbon up you can clean it by taking it off and using carbon cleaner also replace the sensor for the egr valve. EGR controls idle if carbon up it will cause this problem you explained.

Mar 20, 2009 | 1997 Jeep Cherokee

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