20 Most Recent 1999 Jeep Cherokee Questions & Answers

ox. sensor no. 1 check exhaust pipe below exhast manifold

1999 Jeep... | Answered on Mar 12, 2020

it will be right on the tank itself

1999 Jeep... | Answered on Oct 21, 2019

Possible low fuel pressure. Should be 31-35 depending on which engine you have. Check to see what you have.

1999 Jeep... | Answered on Apr 24, 2019

the 90's jeeps are susceptible to having grounding issues, disconnect the battery, follow your ground wire from the battery to the block, use a file and clean the connections, there is a ground strap from the rear right head bolt (drivers side firewall) to the chassis, clean that up on both sides, and there is a ground connection from the computer to the chassis, clean those all up, clear your codes and try again.

1999 Jeep... | Answered on Apr 08, 2019

You will get the required diagram from the given link along with service and repair manual https://toolsnyou.com

1999 Jeep... | Answered on Feb 04, 2019

To eliminate wiring issue take good speaker and hook it up directly to the left front output - if it does not work then that amp is blown. Period.

1999 Jeep... | Answered on Nov 17, 2018

a loud engine can mean a lot of things, could be worn valves piston rings etc, I myself have round the clock engine and it was noisy, but i used a can of engine restorer, and noticed with in ten minutes the difference, its expensive but on an old warn engine it had done the trick. might even help yours, it does not really matter how meany oil changes you do an engine will wear a bit, if its pulling ok with no difference then its not a really serious problem, it could just be a blowing exhaust manifold or downpipe, or even a damaged air filter. check these parts look for cracks in the manifold as these when the engine gets hot will expand, even just a tinny crack can make a loud noise. check the the manifold seal to the engine is good, good way to test the seal is water in a squeezer bottle or spray, or even just look for blow marks on the engine. also check the engine oil cap, check it for a mayo looking oil color this can be a sign that the oil is getting damp or water is getting into the oil. this can also change the sound of the engine as the oil has become contaminated, oil can have a bit of water in there but its usually heated away with engine use. i hope this items help you find your problem.

1999 Jeep... | Answered on Feb 01, 2018

Testing the electrical circuit's ,using wiring diagrams and a DVOM - digital volt ohmmeter is how to find electrical problems , Anything suggest on here would be just a guess . You don't know how to test automotive electrical circuit's , suggest you take your vehicle to a qualified repair shop or learn ! Free wiring diagrams here http://www.bbbind.com/free-tsb Enter vehicle info. year , make , model an engine ! Under system click on lighting ,then under subsystem click on turn signal lamps . Click the search button ,then the blue link. If you had a factory service repair manual it would give you step by step diagnostic procedures .
Electric Testing Techniques You Need to Know
Basic Electricity for Service Techs Ohm law Current Flow Opens Shorts
This is how automotive electrical problems are solved

1999 Jeep... | Answered on Jan 28, 2018

probably one of the cables is shortening out
check for bare wire

1999 Jeep... | Answered on Dec 02, 2017

Check fuel pressure at injector rail.
Do It Yourself Diagnosis and Repair

1999 Jeep... | Answered on Aug 04, 2017

may need a new dimmer switch (rheostat)

1999 Jeep... | Answered on Jun 11, 2017

this is real simple physics (simple tests find this) in order.
1: first engine must get hot,180f or more. (bad thermostat it cant)
2: that same water (coolant) must FLOW in the heater core.
the SM shows, in the HVAC chapter, checking the 2 core hoses
as they pass firewall to core by hand (skills) or IR gun
to see that they are near 150f or more,(water inside is hotter,dig)
if both are hot, flow may be good. bet yes.
leaving what. just one cause, the heat damper is stuck closed.

did you want to test or guess?
you never said. my guess is you want only guessing here.
in web bunny land.
so here i go., Mr. Carnac .

i guess, damper stuck, and then reading the SM
find out why.


1999 Jeep... | Answered on Mar 16, 2017

Could you explain this a little better , hesitates at tip in after you first start it when warm > hesitates at tip in ???? plus after first you first start it when warm . What's warm ? the engine ? The temperature out side ? Or after you had it running an shut it off an restart the vehicle ? The engine temp. is warm , hot etc.... cooling fans working , vapor lock ?

1999 Jeep... | Answered on Mar 07, 2017

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