Jeep jerking and trying to die

Tiny
CRUMPED
  • MEMBER
  • JEEP CHEROKEE
I have got a 1995 jeep grand cherokee straight 6cyl. I hadnt been having any trouble with my jeep untill I bought some cheep gas. After I left the gas station I was driving my jeep and all of a sudden it jerked like it was going to quit but that day it didnt. And today I went somewhere and was coming home my jeep jerked then it died. I put my foot on the gas pedal and it wouldnt do anything then all of a sudden I put my foot back on the gas pedal and my jeep took the gas. Was fine all the way home. But for 3 weeks it has been jerking every now and again. But it had never died on me like it had done today. We put a new fuel filter in it. A week ago but still haveing troubles. Can you please help me? And if theres anybody out there that has had the same problem please could you let me know? Thank you guys so much. And also sometimes I have to cranked it awhile to get it started too. It acts like its not getting enough gas!
Sunday, July 22nd, 2007 AT 12:16 PM

7 Replies

Tiny
DPWD23
  • MECHANIC
  • 136 POSTS
Your first step should be to get a high quality gas dryer/fuel injector cleaner. Go to the auto parts store and ask for the best they have. Their is this one that is made for both Gasoline and Diesiel engines that I have found to work wonderfully, although I can't mention the brand name.

Add that to the tank, and add a few gallons of permium gasoline. Let it run for a while to get it circulating in the system.

If things don't imporve, check the fuel pressure at the fuel rail, with the engine running. If it reads fine, disconnect the fuel pressure regulator vacuum line, the pressure should shoot up at least a few PSI. If not, replace that pressure regulator, it's not that expensive. (Maybe a good idea to do it anyhow with that many miles) also check for vacuum leaks, between manifold and pressure regulator.

After test/repairs report back, so we can know if it worked or not. Maybe more diagnosis can help, but this is where to start.
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Sunday, July 22nd, 2007 AT 12:49 PM
Tiny
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Im the one that is having the jeep problems above. Thank you very much for answering to my question so fast. My jeep only has like 82 000.00 miles on it. Do you think maybe that I could still have some bad gas still in my jeep?I have put some fuel injector stuff in my jeep. The other day. But I havent tryed the gas dryer stuff but I will do that thank you my jeep has got alot of power it runs good except for the jerking and then it quiting today.
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Sunday, July 22nd, 2007 AT 1:22 PM
Tiny
DPWD23
  • MECHANIC
  • 136 POSTS
Only way to get all the bad gas out is to drain the tank completely, and fill it up with good gas. You would need to also flush out the fuel lines.

I would recomend getting all the gas you can out of the tank, and using it for a lawnmower or something, and filling 1/2 full with premium and a good quality injector cleaner/dryer like Lucas, STP, or Gumout (in order of my personal prefrence, but every one has their own prefrence).
I have to find my Jeep repair book for some specs on fuel pressure, but I'll be willing to help you through this if you want to do all this yourself.
If you don't want to takel the problem yourself, try the above solutions, and talk to a reputable mechanic (not the ripoff artists that charge $100 for a fuel filter change), and let them know EXACTLY what you have experienced and what you have done.
You can dramatically reduce their diagnostic time by letting them know what exactly has been done, so they know where to start next.
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Sunday, July 22nd, 2007 AT 1:39 PM
Tiny
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Well I dont think I will be doing the work myself cause im woman ha! I would know the first thing about working on my jeep. My dad was a very good mechanic but he passed away and now I dont have him to help his little girl anymore. I know these garages around here the men really take advandage of women.I really do appreciate you taking the time to try to help me tho. Its times like this I miss my dad. I will try the dry gas first thing dont you think? Thank you for your time. Ps. When I turn my key on I can hear my fuel pump is that a sign that its still ok? And also what kind of simptoms would my jeep have if it were to start going bad?
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Sunday, July 22nd, 2007 AT 2:07 PM
Tiny
DPWD23
  • MECHANIC
  • 136 POSTS
Sometimes fuel pumps get VERY loud when they are about to die, other times they just go silently. If it starts up and runs, that's a sign that the fuel pump is probably not to blame.
I would talk to some friends to find out what mechanics they use, and maybe have a male friend go with you when getting an estimate. Talk to several mechanics, and try to get the best price (don't tell one mechanic what the other one said, they will probably say "and hemissed this, that's why you should use me"). Like anything else, it's your right (and a good idea) to shop around for the best price for auto repair.
I believe that the FTC requires that all repairs over $50 be approved in writing before the mechanic can go ahead. But any mechanic with good taste will charge for diagnosic, and approve even the smallest of repairs first.
Keep me posted on what happens. And YES, use the dry gas first. If their is water in the fuel line, it will cause it to run like dog doo!
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Monday, July 23rd, 2007 AT 1:41 AM
Tiny
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I WENT DOWN TO THE AUTO PARTS AND BOUGHT SOME LUCAS MY MOTOR SEEMED TO SMOOTH OUT AND HAVE A LOT MORE POWER. IM GOING TO RUN THE GAS OUT THAT I HAVE IN MY TANK BEFORE I BUY MORE. THE AUTO PARTS GUY TOLD ME THAT IF I HAD GOT BAD GAS THAT THERE MAY HAVE BEEN A DRUG IN MY INJECTOR. SO I GUESS WE WILL SEE HUH? I WILL KEEP YOU INFORMED OF MY PROGRESS. AGAIN I REALLY THANK YOU FOR TAKING TIME OUT TO HELP ME. I WILL LET YOU KNOW.
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Monday, July 23rd, 2007 AT 9:29 AM
Tiny
CRUMPED
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  • 7 POSTS
I need to ask you a question my fuel pump must have quit working on my jeep because its not making any noise when I turn my key on. So what I was wondering is can you tell me what kind of fuel pump that I need? They say that your suppose to buy the one that is made for the type of jeep. I checked on a price at my local auto parts place it is gonna cost 332.00. I almost past out. Is there any other place that you know of thats cheaper? My jeep is 1995 jeep cherokee 6 cyl 4.0. I really thank you if you can help me.
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Tuesday, July 31st, 2007 AT 1:36 PM

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