Question about 1993 Jeep Grand Cherokee

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How can i get started n keep itmy 93 jeep fires but dies rite away i have replaced the pcm the intake tempature sensor replaced all sensors n it wont stay started how do i get it to stay running

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6ya6ya
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Posted on Jan 02, 2017

moparownr
  • 667 Answers

SOURCE: 93 jeep 4.0 not starting

check the ignition coil pick up

Posted on Mar 23, 2009

  • 50 Answers

SOURCE: 93 Jeep Grand Cherokee Won't start

The crankshaft position sensor was seriously problematic in those old jeeps. It's located towards the top of the bell housing slightly to the driver's side I think.

Posted on Apr 15, 2009

  • 1 Answer

SOURCE: 2001 jeep grand cherokee no start, no cam signal or ASD control from pcm

IF YOU PULL OUT CAM SENSOR YOU HAVE TO PUT A TOOTH PICK IN THE TWO HOLES ON THE TOP AND THEN PUT IT BACK IN AND FACE IT TO THE BACK OF THE ENGINE.KING OF 4.0

Posted on May 15, 2009

SOURCE: Car turns over but won;t stay running

Just because a computer is re-programmed does not mean it does not have an internal fault. The question really is who diagnosed this in the beginning. Most likely you have a issue that is not related to the computer. The exact symptoms need to be stated before anyone ever touched the vehicle. Now that you have messed with things its going to take alot more time to go backwards and figure out the new problem before we can eved address the old one. You will need a scanner to read data to see what information is not reaching the PCM. This may of been a fuel delivery issue in the beginning or an idle air control valve issue. No way to tell without test equipment. Not even the best mechanic can diagnose accurately without hand on. Even so they make mistakes and recommend wrongs parts so with this in mind you need to be aware that all we can do here is suggest parts which can get pretty expensive in the long run.

Posted on Sep 08, 2009

  • 1 Answer

SOURCE: 1993 jeep wrangler won't start. replaced crank

Did u check all the main fuses and relays under hood?

Posted on Oct 15, 2009

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1 Answer

My jeep is turning over but wont start. I replaced the coil and it will occasionly spark and attemt to start only to soon die then it wont get another spark at all. How do i fix this??


Jeeps most common problem is with these particular vehicles are the crank sensors. May also have a bad reluctor. which is part of the flywheel. What you need to do first, Need to first remove the crank sensor which is on top of the bell housing. Remove it and inspect for cracks if you see any cracks replace it. and reset gap. You can use a small piece cardboard like the thickness of an oil filter box,tape it to the tip end of the sensor,and reinstall. After inspection or replacement of the sensor, start vehicle,Also keep an eye on your tachometer . Your tachometer should slightly come up when cranking. If not replace sensor.The crank sensor is a part of the ignition system, the pcm needs to see where top dead center is or where #1 cylinder is to determine when to spark, simply put. So the pcm knows when to fire.

Jul 11, 2015 | 1999 Jeep Wrangler

2 Answers

Why wont my sons jeep run now


Try putting a timing light on it once you get it to crank and idle. Sounds like the timing is retarded too much. Advancing it should make it run better. Also check that you are getting proper fuel pressure to the engine.

Feb 18, 2015 | 1993 Jeep Grand Cherokee

1 Answer

I got a code 43 what do it mean


1994 Jeep, Cherokee?

check all EFI system fuse first with a meter.

that is ASD drop out.
all jeeps from 93 to now have ASD relays.

43 code (nice checking you did) is bad spark.
when the PCM sees bad spark it then shuts every thing down

http://www.fixkick.com/Jeeps/ASD.html

cause is bad ignitor or coil.
the big v8, with the funny locking throttle body... short.
that is true if you crank for 5 full seconds.
to see if CMP sensor fails too.
cmp cam sensor is in the distributor base.
the ignitor is in the PCM, and drives the coil directly.
i presume spark is dead directly at the coil terminal
and is dead the first 2 seconds cranking. right.
takes 2 person to test spark. one at key , 1 and coil
the PCM only allows 2 seconds for spark to happen
if it fails ,it kills the ASD relay.
making trouble shooting tad hard , for those that dont know jeep ASD issues.
if the 5.2L cmp and CKP sensors work right, the PCM then creates spark
it does this via and ignitor.
the coil can be bad, as can the rotor and cap. id replace any old cap and rotor, fast. if the coil tower terminal HV. has good spark.

read failure to start test here
http://www.jeep4x4center.com/knowledge-base/index.htm?utm_source=cj#service
chapter 8D-6

and page 8w-30-4 , coil schematic.
as you can see, the coil has 12vdc key on for 2 seconds.
cranking.
the PCM ground the minus coil pin.
this charges and fires the coil
the ignitor transistor is in the PCM on this car.
The PCM monitors this pin minus , and if it fails to pulse,
it knows the Coil is dead. and then shuts down EVERYTHING EFI wise.

that is how it works.
tricky yes,but true.



Apr 06, 2014 | 1994 Jeep Cherokee Country

1 Answer

2002 jeep Cherokee larado will start, but die right away. ?????


me personally i have a 93 cherokee country and mine did that if its a automatic and you can keep it running by putting your foot on the gas but it wont shift right then it would be your (TPS) throttle positioning sensor, if thats not the fix i would go to the crankshaft positioning sensor if its worn out it can read the teeth on the flywheel and wont send spark hope this helps!

Mar 02, 2013 | Cars & Trucks

2 Answers

93 jeep grand cherokee wont start


Take 2 screws out of PCM and replace with shorter ones

Oct 23, 2012 | 1997 Jeep Grand Cherokee

1 Answer

Code p0131 Excessive fuel consumption Intermittent no start (cranks, fires up then dies) Replaced Plugs and wires Fuel filter 02 sensor I don't know where to go from here


CODE PO131 - HO2S 11 BANK 1 SENSOR SENSOR I CIRCUIT LOW INPUT CONDITIONS. POSSIBLE CAUSES LOOK FOR INTAKE LEAKS IN THE EXHAUST SYSTEM, LOOK FOR INTAKE VACUUM LINES LEAKS. FUEL SYSTEM TOO LEAN WEAK FUEL PRESSURE CLOGGED FUEL FILTER,WEAK FUEL PUMP. FAULTY HO2S SENSOR.OR HO2S SENSOR SIGNAL CIRCUIT SHORTED TO SENSOR. HO2S SENSOR DAMAGED CRACKED OR HOLE CLOGGED. PCM HAS FAILED.

Aug 12, 2011 | Chevrolet Malibu Cars & Trucks

1 Answer

93 jeep Cherokee wont start


Could be a crank or cam sensor gone bad. I suggest you get a haynes or chilton manual and do the testing outlined in them to determine which it is. Neither item is very inexpensive and the crank sensor is a real pain to replace. There are other things that can do that so testing is important.
Crank sensor is the most common failure but asd relay, wiring problems, bad ground on a relay etc can do much the same thing.
Anything you find that you need further help with I'll be happy to answer if I can!
Good Luck!

Apr 17, 2010 | 1993 Jeep Grand Cherokee

1 Answer

I have a 91 mazda mx6 it will turn over but will not always fire up,but when it does it may run for a long time or it may die rite away and then sometimes it'll start up and sometimes I can crank the batt....


Check the air intake tube that goes to the throttle body, Check for cracks or leaks, This can cause unmetered air to get by the mass air flow sensor

Mar 13, 2010 | 1991 Mazda MX-6

1 Answer

93 Jeep Grand Cherokee Won't start


The crankshaft position sensor was seriously problematic in those old jeeps. It's located towards the top of the bell housing slightly to the driver's side I think.

Apr 15, 2009 | 1994 Jeep Grand Cherokee

3 Answers

1999 jeep tj cranks but wont start


replace the crankshaft position sensor

Aug 16, 2008 | 1999 Jeep Wrangler

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