What is your question?
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What is your question?
When I am driving the engine shuts off sometimes. Sometimes it will start right up other times it takes awhile. I need to know if it could be the fuel pump or aould it be the fuel filter. The altenator is fine I got it tested.
6 Replies
I had this same problem with my 97 grand cherokee. I have a website with some valuable info for you, it could be your pcm. It seems to be a pattern when these jeeps get around 150,000 or so miles. A quick and easy way to figure out if it is or not is to start your jeep and let it idle. Open the hood and then push on the top left corner of the pcm. If your not sure where it is or what it looks like, it is a silver box with 3 big wiring harnesses plugged into it. It is bolted onto the firewall on the passenger side behind the coolant overflow tank. When you push on the pcm on the top left corner (the corner closest to the engine) the engine will stall, cut out, studder, and die. If thats the case you can take out the two screws that are below the connectors that plug into the pcm and replace them with shorter ones. Also, you should take a small piece of wood or a piece of PVC pipe and wedge it in between the firewall and the pcm on the same side that you pushed on. Hope this helps.
If the engine is shutting off instantly, then it sounds like you may have an electrical component that is shutting off. This could be a relay that controls the fuel pump, the fuel pump, or an ignition related component. It's unlikely related to the fuel filter, or the charging system. Have a shop check the trouble codes for you and see if any codes are stored, this is a good place to start.
I was having the same problem with my 1999 Grand Jeep Cherokee (4.0)right before Christmas. The crankshaft position sensor was replaced and so far so good. The sensor cost about $40. Initially they couldn't find it but now we know it is on the top left side where the engine connects to the transmission. It is held in place by one bolt. Before you but the part check the code on the truck yourself to see what code pops up. Check it by turning the key until the odometer shows the mileage and turn it off. repeat until the mileage is replaced by a code. Write the number down and google the code. Mine was P0320
Hey just out of curiosity did this fix your issue? Same code came up when I did the key on off thing. Was this a fix for you or did it continue to keep doing it?
I had this prob it was a the sensor located on the side of the bellhausing.crank position sensor i think and it was very hard to get to
I don't fucking care
you need to buy a brand new ECM or computer . ok man you owe me 100 bucks plus tax
LMAO you must work for Chevy! That's too funny.
I've got a 1999 Grand Cherokee limited with the 4.7 and it does the same thing but it don't pop up any codes to check only thing that will pop up is the circle with a line through it and a key in the middle but it doesn't do it Everytime it shuts off just sometimes also the blinkers don't work but it will work the head lights no problem and the tail lights only has one running light when on and the other side lights up when breaks are pushed but I've got a new battery new terminals I've checked the alternator everyone I have ask has been at a lost and when it does it also say the battery voltage bottoms out and the gas hand but all the other gage's work find and I've pressed the fuel line when it's done it and it shoots gas out no problem I have no idea what to do any I can't keep watching my wife and kids have to sit on the side over the road bc idk what to do any really don't have the money to pay 2 or 3 hundred dollars for someone to look at it just to fix to 18 other things that are wrong with it I just need it to run and get me from point a to point b
I signed in just to leave this comment. It would sure be nice if those who answer would really know what they're talking about and not just guessing. And by that I mean not just at this sight. This is the first that appears. So this one seems to push the crank shaft sensor. But here's where the problem starts. Saying the code P0320 means it's the crank shaft sensor issue. My code comes up P0340 and that says crank shaft sensor. Two different codes. Go to the next forum and the best answer says 99% of the time it's the cam shaft shaft sensor. Then there's another saying the ECM has issues. And there's others with different large percentage answers say other. So going by this site, there's 40,45 dollars to replace the crankshaft sensor. Gee that was maybe that was wrong because still doing the same thing. Next,the 99% sure camshaft sensor. Didn't see a price, so we'll say $40-$45. Nope. Still doing the same. Soon a person could have a few hundred into replacing. Parts and still no help. So my point is, unless you're REALLY sure and know what you're doing, keep your guessing game to yourself. And here's my advice. Get rid of that experimental computerized piece of crap and get a older PRE COMPUTER car and problem solved.