Question about 1996 Jeep Cherokee Sport

1 Answer

My 1996 Jeep Cherokee 4L 6CYL heater stops blowing and defroster starts blowing when the engine is under load. Let off the gas and the heater starts blowing again. I think it miught be a vacuum leak... Any idea how to track the problem down?

Posted by on

  • ataliawa Feb 01, 2010

    Using the technique described above, I found a worn rubber nipple on one of the manifold vacuum hoses. I replaced it and it seemed to work fine idling and revving in the driveway. Headed for the mountains next weekend and will find out for sure.

    Thanks!!!

×

1 Answer

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points

    All-Star:

    An expert that got 10 achievements.

    MVP:

    An expert that got 5 achievements.

    Vice President:

    An expert whose answer got voted for 100 times.

  • Master
  • 430 Answers

Vacuum leaks can be identified by spraying small amounts of carburetor cleaner around the vacuum lines/hoses & connections. Any area that sucks in the carb cleaner will cause the engine to idle slower for a few seconds. Spray sparingly & allow to dissipate/evaporate between spraying to prevent any possible fire danger. The problem you are describing could also be the vacuum resivoir having a crack in it, it usuall stores enough vacuum to allow acceleration without affecting the heater controls as yours are being affected. this is usually a cannister or a black plastic mounted ball shaped device that has vacuum line(s) leading to them located on the fenderwells. good luck

Posted on Jan 30, 2010

Testimonial: "Haven't tried it yet but now I know what to do... Thanks!!!"

1 Suggested Answer

6ya6ya
  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

Hi,
a 6ya expert can help you resolve that issue over the phone in a minute or two.
best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
the service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.
goodluck!

Posted on Jan 02, 2017

Add Your Answer

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

2 Answers

RADIATOR ENGINE COOLING Electric fan override 1996 Jeep Cherokee Sport


RAD FAN IT IS. Engine cooling fan.
redux 1, 1996 XJ, 4.0L engine.
Rad fan, only.
RAD fan on,with PCM wanting it OFF. bypass.

or want fan to run fording streams. NO.
ask your offroad buddies what fording streams means. (hint it's not FORD car)
We do this offroad so the fan blades dont crash and break off, as they hit deep water.
posted vast times the free schematic, off the FSM book. links.
then chapter 8w (wiring)
then fan in index.
then , easy no?
pdf page 19 is the real index.
PAGE exact. XJ.
8w 42-9 is relay,pdf page 223
so lets go there.
WIRE COLOR ANSWERED !! below. 1st page of 8w show what color codes mean on all jeeps made.
the DB-PK wire on the relay D13
if grounded by any switch turns on the relay and fan.
do not use 12v power there or say goodbye to PCM. boom. (it will blow it up)
even grounding it can... (avoid the $500+ mistakes)


the free FSM
http://www.morris4x4center.com/knowledge-base/index.htm?utm_source=cj#service




pg 223 pdf page, chapter 8w,
26208159-bnquiemrjrikidk3oq4310b3-4-0.jpg
Relay FAN. ECU runs it there are no thermal switches, the ECT readings do all this. and very well.
the coil has 12vdc power keyon, the other rlay pin is hot all time.bat pin
top right.


see my switch ?if you use center off version switch
mark center FORD
eg: normal(pcm), ford, BYpass (or active)
or normal, dead, force on.

26208159-ppm5zcq0sbxpmvy35jrfnkrx-4-2.jpg

the first image is the risky way... but some do that. just SPST switch. (2 pins toggle, id use the 3pin way)

May 29, 2016 | 1996 Jeep Cherokee Sport

1 Answer

AC/Heater blower fan stops blowing air into the cabin when I accelerate.


Usually a vac leak. I would check for a leak in the HVAC control system and the line thru the firewall to the engine.

Aug 17, 2012 | 1998 Jeep Grand Cherokee

1 Answer

98 Jeep Cherokee 6cyl - heater & a/c only blow out defroster duct


Usually a sign of a vac leak between the engine and the control on the dash or the blend door.
The defrost position is the default when there is a problem with the system so that the windshield stays clear in wintertime.

Jul 20, 2012 | Jeep Grand Cherokee Cars & Trucks

1 Answer

My 2004 GC has engine light reading code of small and large vaccum leak. Mechanic couldnt find anything under hood. Vents for AC or heat switch to defrost area when pulling a hill, then back to normal when...


Some vehicles are equiped from the factory to lower or deter ac and heat flow from the vents in order to keep power and moment when the engine is under more load. This happens on my girlfriends explorer as well but for hers its a factory thing. When the vents started acting up is this when the engine light started coming on?

Jan 15, 2011 | 2004 Jeep Grand Cherokee

1 Answer

I have a 1996 cherokee country. When I use y


Could be the control switch itself. Or possibly the actuator that moves the door from defrost to heater. With the heater on, try switching from defrost to heat and try to hear if you can hear anything in the dash operating.

Mar 09, 2010 | 1995 Jeep Cherokee

1 Answer

Where is the flasher located


1996 Jeep Grand Cherokee 4WD 4.0L MFI 6cyl:
The Flasher is located front seating area, driver side, under dash, driver side of steering column, mounted in convenience center.
Application:
- Hazard flasher
- Turn signal

Check the ZJ-Secc-8W-Wiring-Diagrams (page 8) for Convince Center graphics.

I really hope helps with this (remember rated this help) Good luck.

Dec 29, 2009 | 1996 Jeep Grand Cherokee

1 Answer

96 jeep grand cherokee hatter has defrost only .


Check the sticker under the hood on the rad support or on the firewall,it should lead you to the problem.

Dec 15, 2009 | 1996 Jeep Grand Cherokee

3 Answers

Heater core leak in 2002 Jeep Grand Cherokee Ltd


your heater core is leaking its not fog on your windows its from the antifreeze having same problem so im replacing it myself but having problems getting the dash off its a head ache the heater core costs 91.99 at autozone i priced the job at a few shops and it runs between 7 and 900 dollars.good luck man

Feb 03, 2009 | 2000 Jeep Grand Cherokee

Not finding what you are looking for?
Cars & Trucks Logo

169 people viewed this question

Ask a Question

Usually answered in minutes!

Top Jeep Experts

yadayada
yadayada

Level 3 Expert

74945 Answers

Colin Stickland
Colin Stickland

Level 3 Expert

22095 Answers

Jeff Turcotte
Jeff Turcotte

Level 3 Expert

7697 Answers

Are you a Jeep Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...