Question about 1990 Jeep Cherokee Limited

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Jeep fast idle

90 cherokee when start cold i have to hold the gas pedal until it warms up after it warms up the idle climbs slowly by itself up to 3000 rpm test done replace iac reset tps replace coolant temp sensor check for vacuum leak clean throtle body and install new gascket and all that did not change nothing

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Check for broken pcv valve

Posted on Feb 05, 2010

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1 Answer

1996 Jeep cold start heater location


It likely has EFI (electronic fuel injection) and an idle air control valve that regulate idle speed. They can get gummed and fail to have a fast idle when cold, or get stuck the other way, and have a too fast idle all the or regularly take its time slowing down after you take your foot off the gas. An engine temp sensor can also cause a lingering high idle if it reports the engine as still being cold after warm up.

Aug 15, 2014 | 1996 Jeep Grand Cherokee

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2002 jeep grand Cherokee change batt. Now it starts but won't run?


Because you disconnected the battery you lost the long trim value,you will now have to relearn the idle,start the vehicle idle it to 1500 RPM,hold for a minute,idle should stabilize,turn on A/C let it idle,for a minute,now your done,

Aug 19, 2012 | 2002 Jeep Grand Cherokee

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Need to use gas pedal to star in the morning after warmed up in starts fine


Just a little technical information: Your jeep does not have a "gas" pedal. Your Jeep has an "accelerator" pedal. This may sound trivial, but if you understand this, it will help you to know what is going on. The accelerator does not control the gas, it controls the air going into your engine. If the engine will not start until you give it more air, then the problem is most likely an Idle Air Control solenoid (IAC) that is sticking closed during cold operation. This is a common problem. Replacing the IAC will probably fix the problem.

Jan 22, 2011 | 1998 Jeep Cherokee

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What kind of carb does the 76 c10 4x4 come with need to adjust


mcdevito75 here, The fast idle is needed when the engine is cold to make the air and fuel mixture rich to keep the engine running while cold, the carb. choke doew this with a bi-metalic spring in that balck round box on the side of the carb, a screw also hepls keep the choke closed until warm up, this screw can be adjusted tpo control how tight it holds the choke cloesed, here"s how to adjust this screw to slow fast idle speed, Locate on the carb, where the gas pedal connects, have a friend operate the gas pedal with the engine off, once you locate the linkage, you"ll also see 2 screws with springs around them, 1 is for fast idle the other for regular idle, you want the fast idle screw, notice this screw will lay against and Half moon shaped tab, while the other screw lays against a shaft, you need the screw that lays against the half moon shaped tab. Start the engine and step on the gas pedal slightly and relaease, at the screw that lays against this half moon, simply turn it counter clockwise or toward you just 1 2 or 3 turns very slowly, you'll hear the fast idle come down but you don"t want the fast idle to low, listen to the engine very carefully, slow it down just a bit, it should still race though but not out of control. Of course for a full carb, adjustment the shop should handle that., but this info will help.

Mar 29, 2010 | 1978 Chevrolet C1500

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1997 Jeep cherokee back door latch....was difficult to open requiring multiple tugs, and now won't open at all.


The latch on the gate holds and locks itself on a peg on the floor panel. These are adjustable and after time can move causing the problems you have now.

You may have to get in the boot / trunk and remove the inner panel to access the lock internally to open but try this first:

Pull up latch handle and keep holding it up until open, shoulder firmly the backdoor as if you are trying to close it hard, it should click, then pull open.

Nov 19, 2009 | 1997 Jeep Cherokee Country

1 Answer

95 jeep cherokee idles and wants to die


replace your ignition coil. it will be on the right side of the engine compartment. it has been a while but there is only a few small bolts to remove and of course the center spark plug boot and wire harness un hook. ... Enjoy driving the your jeep again when warm.

Apr 01, 2009 | 1995 Jeep Grand Cherokee

1 Answer

1999 jeep cherokee wont idle cold


The iac would be my first guess but this troubles me as the when the engine is cold all the sensors are ignored until the fuel system goes into "open mode" but to change the iac is simple 2 screws and unplug the module and instructions come with a new one to tell you how far the air pintle is supposed to be set at,
If you can change your own oil than this is easy.
I did rebuild wrecked vehicles for about 15 yrs and gave it up as back in the day we never wore mask's and hacked up to much hardner so now I just fix them,in a chrysler,jeep dealership of course.

Mar 08, 2009 | 1999 Jeep Cherokee

2 Answers

Fuel pump not running only in cold weather


Pumping the pedal on an injected engine does nothing, except varying the air intake amount. I would change the fuel filter (if badly plugged, it may be causing the pump to shut off early) and clean the idle air control valve.(which should regulate idle air flow, eliminating the need for playing with the pedal) The valve itself is not difficult to service, but is a bit delicate. It can be cleaned with carb cleaner. just make sure you do not turn the valve end around while cleaning, and re-install it perfectly straight. You may have a bad drain back valve in the pump, but this is less common than what I outlined above.(there are tests for this)

Jan 12, 2009 | 1995 Jeep Grand Cherokee

1 Answer

1987 jeep cherokee larado


Where is the gas leaking from? To clear a flooded engine, keep your foot all the way down on the gas pedal while you try to start the car. As it starts keep holding until it sounds like it's smothing out then slowly release. You can also change the spark plugs if that does not work.

Jul 26, 2008 | 1987 Jeep Cherokee

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