Question about 1993 Jeep Cherokee Country

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Repair My problem is that my Jeep starts up and then shuts down after 5 seconds i think it may be the crank sensor any ideals

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That's a good place to start.

Posted on Oct 15, 2008

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Why would a 95 2.5liter jeep engine after replacing crank sencer start up run just fine then after shut off not start untill jumped and rev up high


Did you reset computer
You can do this by removing battery positive and leaving off for about 5 mins make sure you have radio code though

Mar 04, 2015 | Jeep Cars & Trucks

1 Answer

Autoshutdown keeps turning on


which engine???????????????????????????
ASD is tricky on jeeps.
The Auto shutdown,relay.
what is it , how does it works is covered in the fsm. read it.
http://www.jeep4x4center.com/knowledge-base/index.htm?utm_source=cj#service
The ECU runs this RELAY, and if the ECU sees a gross error
it shuts this down, and the schematic there is clear as to what.
both spark and fueling.
here is what can drop it out.
1: crank sensor.
2: cam sensors or TDC ,etc.
3: sees spark dead or weak.
4: Immobilizer active. (failed)

as the book says , make sure spark is good for the 2 seconds cranking. (not after the 2seconds)
the ECU is programmed like this.
user cranks.
ECU creates spark,, using the crank/cam sensors at the time base
for 2 seconds
if the spark read back fails or the 2 sensors fail, the ecu shuts DOWN.
this is for fire prevention.
most other cars just cut the injectors, but not jeep
the drop the MAIN ASD relay.

using the check engine light flash codes, you can see which of the
3 failed, cranking for 5 second and releasing the key on all cars.
1996 and newer a scan tool is use to same effects.

now the 64,000 dollar qustion,
see page 8w-30-4
why does the ASD KILL THE IGNITION coil. easy.
1: it only guess it 2 seconds to make spark
2: if it cant,. it then drops the relay. killing fuel too.
3: this prevents the the crash and burn you see on TV.

so its 2 second permissive system. (or 3?) i forget exact seconds, its in then book and is short.
many dont know this. but is a fact.


now the flash codes.
crank for 5 seconds while in flash code mode
see emmisions page for how.

flash code 11 drops the ASD ! (cam or crank sensor dead)
code 54 cam signal dead?
code 43, spark bad.

Mar 02, 2014 | 1993 Jeep Grand Cherokee

1 Answer

Crank sensor for 1994 jeep laredo


why not let the PCM tell you what sensor is bad.
and do the spark test, x 4 x 6? ???
if spark is all bad.
insert the diagnostic jumper wire.
then key on,
then crank for 5 seconds.
release key
flash code will tell you if any of 3 inputs are bad, 2 sensors or spark.
The ECU cuts all fuel if it even THINKS spark is bad.
fact.
why not test spark?/ like we do for 100 years now.
its no secret how.. like 125 million google hits. (what a million hits for every year./ LOL)

this trick works on all cars and jeeps from 1988 to now.
all. all with EFI and jeep used EFI in 1988, I had one,(renix sys)

your next learning path is the ASD relay,
its just a relay that kills injection, and friends.
it drops out of the ECU thinks there is no park for 2 seconds cranking.

Feb 14, 2014 | 1994 Jeep Grand Cherokee

1 Answer

1994 jeep cherokee laredo no spark after shutting offf at home. Been starting slower and missing the first few minutes before settleing out and runs smoother in the morning. Oil i sold though is the o


No spark can be caused by a bad crank position sensor, or a bad pick-up coil inside the distributor, especially if you can't find a signal to the coil with key on. You could also test the coil, or try a known good one. There is a test procedure for the crank position sensor, but you'd have to locate a repair manual for it. I think it's just running a resistance test across two terminals of the sensor harness connector with an ohmmeter. My son's Jeep had a bad pick-up coil that shut it down, and no spark.
Once you get it running, and if still hard starting, check the fuel pressure.

Dec 09, 2012 | 1994 Jeep Grand Cherokee

1 Answer

My 2003 jeep grand cherokee will crank and run fine. drive a couple miles stop at light will shut off want crank back up .let it set a while will start right up.


Check the crank position sensor. If this goes out, when it gets hot, the sensor will think the crank/timing is in the wrong position. They did this to prevent engine damage in the event that your timing is off. However, when the sensor gets old, as it gets hot, it malfunctions shutting off the engine. Then, when it cools down a bit, all is well.
IF IT IS THE CRANK SENSOR, REPLACE IT IMMEDIATELY. Repeatedly trying to start an engine w/the CPS out can throw the timing off. This happened to a friend's Kia Sepphia once and it locked up her engine.

Oct 24, 2011 | 2002 Jeep Wrangler

1 Answer

2000jgc shuts off while driving. replaced crank shaft sensor, tighten battery connects, no check engine light comes on, no codes avalible. at times one codes does come up when check engine comes o2 sensor...


Have you checked the map sensor? I have known a few vehicles that did this. Sometimes it would go 5 miles, other times 30. Martin, they would get the same code, O2 sensor. If so, I would try to replace that and it probably will solve the issue. The car would die a few times a day. If you have anymore questions, let me know Martin. I am here to help you.

Feb 24, 2011 | 2000 Jeep Grand Cherokee

1 Answer

When driving my 96 jeep cherokee will shut down and it takes several mins for it to start back then it will do the same thing again what can it be


crank shaft sensor, as soon as car warms up, it will skip (engine stutter(, then when engine cools, so does crank shaft sensor. Good Luck

May 20, 2010 | 1996 Jeep Grand Cherokee

2 Answers

1998 Jeep Grand Cherokee shuts down while driving.


97 cherokee crank sensor replaced, still shuts off, code 351

Apr 22, 2010 | 1998 Jeep Grand Cherokee

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