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Old 01-27-2012, 12:18 AM   #1
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Exclamation Help 95 Jeep Wrangler Grand Rio 4X4

Ok First I would like to thank anyone who responds or comments cause I am at a dead end with my jeep !

Problem It startes about 2 months ago I was going down a interstate about 60 65 MPH and all of the sudden the Jeep just cut off still rolling going 65 MPH everything stayed on except obviously the engine and also I thought that the Speed sensor Unit would still register with the key in the on position while it cut off but the speedometer was not registering long long story short now all it does is sometimes RANDOMLY cuts off you can go 60 miles one day work fine next day go 2 and it would cut off

I can Go outside start it up right now and go a couple of miles and it cut off and be stranded

I have replaced Gas, Fuel Filter( which was dirty) Cap and Rotor ( which seemed to help a little bit) the Fuel Pressure Regulator Vaccum line which was dry rotted and cracked which i thought logically speaking if theres no suction that would be why it is cutting off all of the sudden because of the regulator not opening and cause no fuel to the Fuel Rail the only thing i have not done is Clean/Replace Fuel Injectors I dont want to spend 250 $ on Injectors and it not fix it even though it wouldnt hurt them checked all Wires and plugs all are fine all grounds to chassis and motor are not corroded with acid or anything ! the only thing i could think of was its either an Electrical/Eletronic problem or Fuel Injectors ???

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Old 01-27-2012, 01:06 AM   #2
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Tips from the beas

Need to know what motor you have. There is a sensor on the middle of the fire wall tha acts like a diode for the ignition system. They switched these over from the old school ceramic diode back in the 80's, but sounds to me like the coil is going bad. If it is random and the motor just quits, you are loosing ignition and it is most likely a coil. These are the only 2 thing that I can think of and it is moste likely the coil.

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Old 01-27-2012, 06:58 AM   #3
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1995 Jeep Wrangler Rio Grande 4X4 2.5L 4 cylinder
I think its the coil also but not for sure if its the coil or the Ignition Control Module if I knew where it was id take the Module off and get it tested I know places you can get it tested I know where the Coil is its right beside the distributor and the module is not inside the Distributor so I dont know where it is!
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Old 01-27-2012, 08:44 AM   #4
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no controle module. do you get a check engine light? when a coil fails you tend to get about 3 codes for low voltage to various sensors. I might start with fuel pressure. then possibly cam/crank sensor. check auto shut off relay. rare case on cars i've worked on is the fuel screen in the tank is partialy pluged causing pump to get hot and shut down.
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Old 01-27-2012, 12:05 PM   #5
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Tips from the beas

A coil test is simple. Simply pull a spark lug wire off, place a screwdiver in it and hold it very close to a grounded bolt leaving a small garp and crank the motor over. You should get a spark. What happens is, when the coil gets hot, it expands. If there is a crack in the housing, the spark jumps out of it against the block. If this isn't the problem, then yes, it may be the ignition control module. You can't alway trust these code reads, because they will read a lot of the same codes for different problems. That is the only bad thing about computerized motors. Everysensor must be working in order to get a proper reading.
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Old 01-27-2012, 01:40 PM   #6
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Ive done That already but I dont think it loaded it theamazing beas
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Old 01-27-2012, 01:47 PM   #7
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When I turn the key to on one time it comes on for about 3 seconds even after I started it stays off
when I turn 3 times i get 12 33 55

12 is for battery power to the computer was disconnected within the last 50 key cycles
33 is for Ac Clutch relay witch i dont have ac so i ignore that one
55 is the end code output

I have the originial Owners manual somewhere I do have the .pdf Chiltons Manual for 87-95 Jeep YJ

Ive drove it twenty Miles and nothing has happened when I started it it had trouble kinda like bogging when I floored it with in neutral and clutch in when it was cold and sounds to me like and air and gas mixture Im not sure but throttle body is clean I had it cleaned since other than that ran fine wierd huh! theres no Ignition Control Moduleso im down to the Ignition coil and the Fuel Injectors!
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Old 01-27-2012, 01:48 PM   #8
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could it be this Diode sensor you were talking about earlier in the post I look on and around the Firewall didnt see one?
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Old 02-21-2012, 08:38 PM   #9
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If anyone else is having the problem also heres what I did replace fuel injectors and spark plugs and wires works great now
thanks to all who tried to help Rock on !!!

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