Question about 1994 Jeep Grand Cherokee

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Crank sensor for 1994 jeep laredo

Jeep wont start

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Laredo's but what car? wrangler , Cherokees/.? what?
what engine?, we cant guess engines, and it dont run so......?????
cranks ok. battery charged.,? to 12.6vdc rested?
everyone love to guess, no spark, so crank sensors.... endless post same. and
no that is wrong thinking, ! read on....

1: fuses first. we test them. EFI and spark fuses. all.
2: next we check that CEL lamp glows key on, if not see #1
check engine light glows key on telling you ECU has power.
3: Spark dead on all cylinder,not just one, all.?
if just one , then spark plug shorted or same with wire that feeds it or carbon tracked, distrib cap. ever get a full tuneup this decade?
4: all spark is dead. see #1 and 2 first. and then scan PCM
that is correct 1993+ jeeps all have cheap working over the counter scan tools. scan it, to see if the PCM knows whats wrong
in 90% of cases IT DOES. you';re not looking is why?

crank it for 5 seconds. and it will throw. DTC codes (2 digit) for bad crank or cam or dead ignitors. on all jeeps 1993 to NOW.
it can not see a shorted spark plug.... and that is a tune up part so..
that is all there is, unless PCM cant see the failure. DTC errors.
then you test the coil and make sure the ignitor signals to the spark coil are good and the spark is dead out of actual coil tower.
did you check for spark (using the 100 year old way, and on youtube 10,000 times why?)
the coil must spark or the distributor will be dead.

using the JEEP magic keyon off trick fails with bad spark.
that is because the ECU clears spark errors each key off.
only real scan tools work to find this type of error.
the Innova 3160 , excels here.... rent one?

Posted on Jun 20, 2015

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Keep it simple first disconnect coil wire from distributor leaving coil connected, put a screwdriver in wire place it away from fan or other moving parts such as belt , and crank engine, u shld see spark. if not u found ur problem. coil needs to be replaced

Posted on Jun 20, 2015


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Posted on Jan 02, 2017

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SOURCE: 1998 jeep grand cherokee laredo wont start right

At least take the time to remove your computer connector & check & clean all contacts with battery disconnected, negative first.. Clean good with an electrical cleaner spray can. re-connect then re-connect battery, with negative last.

Posted on Jan 29, 2009

  • 6982 Answers

SOURCE: 1994 jeep wrangler no fire

Crank position sensor has a higher failure rate than it should...however i would not change it "at random" Check for continuity between b&c terminals of the sensor with a digital ohmeter.
There should be no continuity between them (b&c should be marked on connector) No continuity reading is same as when probes are not connected to each other.
I really dislike when people try and help and use terms that owners can't understand ... "check your zxy and qtr then add an abc" dosen't seem helpful. I hope I am as clear as I can be!!!
Good luck.

Posted on Apr 15, 2009

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SOURCE: 2004 jeep grand cherokee laredo wont start. it

Replacing the O2 sensors in a large majority of cases is changing the result, not the cause of the problem....Large variations in exhaust quality often are beyond the operating range of the sensor, causing it to throw a code. Sort of like a situation where you are trying to read something but the words are too small to see so you (like the sensor) will say "I can't read this"...nothing wrong with you, So putting another person where you were won't change anything...words are still too small, and they too will not be able to read them.
A code scan and some individual component tests will likely give you an idea what's going on ...either you have too much/too little fuel, or ignition spark is weak. Any of these items have several causes but can change the quality of the exhaust enough to cause your problem.
Largest problem with offering an on-line diagnosis for you is that without the ability to do the testing I suggested, all I could offer would be guesses. (which can lead to expensive mis-diagnosis)

Posted on Jul 06, 2009

  • 323 Answers

SOURCE: 1994 Jeep Cheerokee Laredo: The remote keyless

If it is a factory alarm you can't unhook it. Replace the switch attached to the lock cylinder inside the door. In the meantime, the switch on the passenger door may still be good. Cycle the key in the passenger door to see if it turns off the alarm.

Posted on Oct 16, 2009

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SOURCE: how to install crank sensor on 2001 jeep cherokee

Sit on top of transmission bell housing, you can get to it from under the hood, drivers side on top on transmission, held on with 10mm bolt. unplug harness to sensor, remove bolts, and replace.

Posted on Aug 16, 2010

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hi , do you think if I replace crank sensor will solve the problem ,my jeep .... Where's the crankshaft located in 99 jeep grand Cherokee laredo .

Oct 24, 2015 | Cars & Trucks

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2003 Laredo. Why won't it start?

If it still cranks but no spark...most likely is the crank position sensor...

Jul 14, 2015 | Jeep Cars & Trucks

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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.
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

96 jeep laredo stopped running gages quit and won't start even after replacing crank shaft sensor but it turns over like it wants to start

Crank sensor wont have any effect on starting, Cam position sensor would. Also check all your fuses.

Mar 27, 2013 | Cars & Trucks

1 Answer


Check on this site for the delayed start check no engine light problem. It could be that or maybe just the crank sensor, as those Jeeps are known for crank sensors going bad.

Dec 16, 2012 | 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

I cant find the obd plug in on my 94 jeep grand cherokee laredo and my jeep will turn over but is hard to start what would cause this?

It does not have an obd11 connector, it's too old. The extended crank time could be a couple of things though. I've seen problems with fuel pumps, fuel pump relays and crankshaft sensors. How many miles on it? Has the fuel pump or filter been changed before?

Apr 03, 2011 | 1994 Jeep Grand Cherokee

1 Answer

My friend has A Grand Cherokee Laredo 1994, 4 liters. His Jeep start and run well. He goes in town and when it is time to re-start his Jeep...the motor turns but does'nt start. If my friend wait 4 to 5...

Next time it don't start I would check to see if it has spark. If it don't have spark there is 3 components i would check #1 Crank sensor #2 cam sensor or pickup coil #3 coil I have a feeling one of these items could be your problem. Good luck

Oct 27, 2010 | 1994 Jeep Grand Cherokee

1 Answer

1994 jeep grand cherokee laredo starting problems

Check to see if the fuel pump is running after it shuts down...could be a relay or the pump itself (overheating internally) Checked the fuel filter yet? Some crank sensors need to be shimmed. If it's too close to the flywheel even though you recently changed it, if it's too close to the wheel it can fail again. May not be the case but worth checking over. Also check the ceramic resistor on the left fender near the master cylinder if you have one. That too can cause problems.

Dec 27, 2009 | 1994 Jeep Grand Cherokee

1 Answer

1994 jeep cherokee starting problem

it is the crankshaft sensor try that and i bet youll get it

Jul 04, 2008 | 1994 Jeep Cherokee

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