While driving my 95 grand cherokee lerado i have a dead mis almost like the engine cuts off and back on several times i let of the gas and eas through its little coughing spell it takes about 3 to 5 mins to clear up and then is fine for a while some times happens more then once during each driving trip but only after the jeep reaches oparating temp. check eng. light not on so computer cant find problem.
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When you say it loses power, do you mean electrical power or engine power ? You would need to look at the fuse boxes for a loss of electrical power, and use a scanner or code reader to check the computer for trouble codes for a loss of engine power.
You might not believe this, but check your battery. Some of these vehicles have cut-outs when the battery level goes below a preset amount.
I work on Ford brands and on them, a low battery level will even disconnect the Alternator circuit and mess with the starter. Some even act up when the battery slightly dips below 12 volts.
Your antitheft can make your starter cut out. And If you think about it, all of the measurements to make the engine run are based on feedback of voltage and amperage. This is how the engine management system adjusts. If your prime source of power is low, then all of the following electrical readings will be low. Some may be too low to work.
Your fuelpump will hold pressure in a closed system for hours. The fuel pressure regulator will command the fuelpump to stop working if the fuel pressure is at maximum. Without responses from the other components and after satisfactory pressure, the fuelpump will turn off.
If you are losing power to the coil, the problem is not the CPS. The CPS only times the negative pulses to the coil. The positive is provided thru the ASD relay. The PCM may be shutting off the ASD relay for several reasons. It could just be a bad ground wire from the PCM to the relay box, a bad ground to the PCM, or perhaps the security system acting up. A way to bypass these problems is to cut the ground wire and ground it directly to the firewall.
12 is a battery disconnect within the last 50 start cycles and 55 means the end of the diagnostic cycle. Basically the computer found nothing wrong. The 12 code may seem incorrect if you haven't disconnected the battery recently, but from my experience the 12 code shows up almost all the time regardless.
i have a 95 jeep grand cherokee lerado from time to time my alarm goes off i dont have a remote 4 my alarm but i found out that if you put the key in the driver door and unlock it. it will reset the alarm!!!!!
You may want to check the wiring harness in the door jam. Those comonly break the wires and cause issues with windows, door locks and other things. The harness boot can be pulled back to inspect. It is a little difficult to put back. If your locks usually lock when put into gear then that is not factory. Factory auto lock does that at 17 MPH