Question about 1995 Jeep Grand Cherokee

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Jeep will crank and run for a little then shuts down acting as if its not getting any gas. but crank and just so far. friend said needed PC Computer?

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Get a manual (chlton or haynes are ok for this) and use a digital multi meter to do individual component tests before changing computer. Most times it is a sensor problem. computers do fail but not that often. It would be wise to isolate the problem to either the fuel or ignition system as well. If it starts when you crank it and spray carb cleaner into the throttle body, then the problem is on the fuel side. Only real connection there is the crank sensor which if lacking signal to computer, will shut fuel system down. Usually though you won't get ignition either in that case. If you need further info, just ask!

Posted on Nov 16, 2009

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I have a 1986 for ranger this happens very regular now need help asap I can crank it up and it will crank fine most time till this happens going down road the truck will start to bog down you can let off...


If you have any rubber fuel lines in the fuel system, I would replace them. Over a period of time the insides of the hoses swell up and stop the fuel flow to the engine.

Jul 15, 2017 | Cars & Trucks

3 Answers

Starting problems


since the computer is only supposed to send fuel and spark signals in reaction to input info, unless a wire in the harness is either grounding or crossing into an output wire, i'd think it's safe to assume the computer is doing that internally. Another reason is that if it were a wiring problem, pretty likely it would not run well after you did get it started.
The only thing I'd do aside from replacing the computer is to unplug all the sensors one by one while it is acting up, to get an idea about wether the errant signal is coming from a sensor or internally.
Likely you can get another computer from a scrapyard.for lots less than a new one. Since this is a "guess" repair, you may want to try that.

Jul 13, 2010 | 1995 Jeep Grand Cherokee

1 Answer

Jeep not running right!


what i do when i see cars that act like that is check fuel pressurse when the problem is acting up also check the spark to see if it is present at the time of the no start also when the check engine light comes on set up with a shop to check forr codes when the light comes on dont shut it off until the scanner can rread the codes. also that veh is equiped with a auto shut down relay system what is does is if a crank shatf sensor starts to go astray it can send the computer into shutdown mode also the o2 heaters can short out and that will send it into shut down mode also when it goes to shut down you will see it on a scan tool that the relay is shutting down also look at the grounds for the cruise control its usaully not the asd relay uaslly a system connected to it that shuts it down. hope this helps thunderboltz

May 27, 2010 | 2001 Jeep Grand Cherokee

1 Answer

93 jeep cherokee 4.0 dies when stopping but idle till fuel gone


GREAT INFORMATION...

however, you were not clear about fuel pressure

was fuel pressure OK before and during the concern...30psi and have you check flow

PLUS...during the concern are you loosing SPARK? Coil is great suspect!

while the code for the crank sensor concerns me I'd start with the most common Jeep concern...the ASD (auto shut down realy)

when you start testing again remember to check the CKP output at the sensor and the CKP input at the computer...you might have a CKP circuit that is worn out







Apr 06, 2010 | 1993 Jeep Grand Cherokee

1 Answer

1999 jeep cherokee sport 6cyl. it will not start. I can hear fuel pump run,gas gets to the injector assy. At one point it would start and run for aminute and then quit soundibg as if it were out of gas....


First, make sure the security system isn't acting up. Lock and unlock the drivers door (some use the rear hatch door for this) Then attempt to start it.
Do some testing. Get a haynes or chilton manual and check the sensors, especially the crank position sensor as if the computer sees no signal from there within a few seconds it will shut everything down. I'd also check to see if the door wiring was intact...if the wire to the security system is broken in the rubber boot between the door and post it will give you a similar problem.
With the amount of electronics involved, only good testing will give you an answer. I can tell you the common problems but am only making educated guesses at what I'd look at first.
Do some testing and you will find the problem.
If you need help with something you find, just ask and someone will help.
Good luck

Mar 26, 2010 | 1999 Jeep Cherokee

1 Answer

1997 jeep cherokee cranks and runs fine but after it warms up when you let off of the gas it shuts off. then when you try to crank it back up it acts like it is starving for gas then it will rev up and...


Change the coolant temp sensor - the one in the thermostat housing that sends information to the ECU

I am 99% that is what is wrong.

Best regards
Lloyd

Dec 12, 2009 | 1997 Jeep Cherokee

1 Answer

I have a 1993 jeep grand cherokee limited and this past week I went to start the jeep and it wouldn't start, after about 10 minutes I started the jeep and gave it a little gas and she fired right up. I...


Jeeps have a part called the crank sensor, when working properly it senses the electrical feild produced by flywheel. This crank sensor which is located on top of the tranny bell housing has been known to go bad. When this crank sensor goes bad the CPU does not get a crank reference and the computer will not fire the injectors. This crank sensor will fail under high temps and if it is old will fail also when cold.
You have to find out if the injectors are getting a pulse when the car does'nt start.

Mar 06, 2009 | 1993 Jeep Grand Cherokee

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