99 XH OVERHEATS AT IDLE ONLY

Asked by GuruDWG5L Aug 15, 2017 at 07:37 PM about the 1999 Jeep Cherokee Sport 4-Door 4WD

Question type: Maintenance & Repair

My 99 xj OVERHEATS at idle only.  
New water pump, new fan clutch, new cts, new
thermostat and a new fan relay with good radiator cap.  
Coolant level is perfect. The electric fan will only come
if i unplug the connector to the cts then it causes the
engine to run rough.  Been fighting this overheating
issue for 3 years now...... oh yes the radiator is new
also.  Any help would be greatly appreciated

6 Answers

8,590

Either the Coolant Temp sensor is working backwards or radiator is blocked. The best bet is to first watch the car heat to 212° and watch the fan kick on. If it doesn't then that's the problem. If fans kick on then move on to checking in to radiator being blocked. Using a digital Temp sensor point it at the radiator any cold spots then you know it's blocking up.

8,590

I realized you said radiator is new. The only left is to check head gasket to see if it's blown

1 people found this helpful.
22,230

See if fans come on after car is up to temp like british77 said. Do the motors work on the fans? If so it is a control issue if they don't come on. Are you using coolant? (Losing). Pressure test system also.

3 people found this helpful.
8,590

That's what you call it! Ok thanks guru9fsv8 at my workplace they call it parameters so I get confused but now I know what to call it.

3 people found this helpful.
22,230

Tennis: good answer if a DIY has a $3000.00+ computer and then knows how to use it. Try to explain in cliffs note terms. You and I have and know how to do what you explained but some on here want a "what can I do" answer.

1 people found this helpful.
10

Did you ever figure out the problem? I’m having the same issue with my 99 XJ. Changed all the cooling system components and the Jeep still overheats at idle.

1 people found this helpful.

Your Answer:

Cherokee

Looking for a Used Cherokee in your area?

CarGurus has 1,952 nationwide Cherokee listings starting at $6,399.

Postal Code:

CarGurus Experts

  • #1
    swtcat13
    Reputation
    4,070
  • #2
    JimRoy
    Reputation
    3,730
  • #3
    Gene Arnett
    Reputation
    3,700
View All

Find great deals from top-rated dealers

Search

Related Models For Sale

Used Jeep Grand Cherokee
121 Great Deals out of 3,487 listings starting at $4,950
Used Jeep Wrangler
144 Great Deals out of 5,930 listings starting at $8,995
Used Toyota RAV4
111 Great Deals out of 2,857 listings starting at $2,949
Used Dodge Durango
65 Great Deals out of 1,994 listings starting at $7,999
Used Ford Explorer
53 Great Deals out of 2,231 listings starting at $7,990
Used Honda CR-V
157 Great Deals out of 4,953 listings starting at $440
Used Toyota 4Runner
20 Great Deals out of 517 listings starting at $6,825
Used Toyota Tacoma
43 Great Deals out of 684 listings starting at $9,975
Used Honda Accord
59 Great Deals out of 1,026 listings starting at $2,995

Content submitted by Users is not endorsed by CarGurus, does not express the opinions of CarGurus, and should not be considered reviewed, screened, or approved by CarGurus. Please refer to CarGurus Terms of Use. Content will be removed if CarGurus becomes aware that it violates our policies.