Jeep XJ sputter at 3k RPM
#1
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Jeep XJ sputter at 3k RPM
Hi, I’m new to this.
My xj 93 2.5l petrol sputter at rpm 3k. Like not getting enough fuel. I had this issue last time and the fuel pressure was low. So I bypass the ballast resistor and the pressure was in range.
But even the ballast resistor is bypassed, still having this issue. My voltage is lower abit.
what can be the issue?
My xj 93 2.5l petrol sputter at rpm 3k. Like not getting enough fuel. I had this issue last time and the fuel pressure was low. So I bypass the ballast resistor and the pressure was in range.
But even the ballast resistor is bypassed, still having this issue. My voltage is lower abit.
what can be the issue?
#2
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Year: 1990
Model: Cherokee (XJ)
Engine: 4.0
Likely the fuel pump itself.
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tjwalker (02-12-2024)
#3
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but I just changed new fuel pump. If alternator not giving enough power, will the fuel pump won’t function properly??
Before this also had bucking issue. So I bypass the ballast resistor. After the bypass, it was ok for few months and had same issue again.
parts change recently :
fuel pump
fuel filter
fuel assembly
fuel injector
exhaust manifold
TPS
fuel regulator
IAC
even after change everything still having bucking issue. Can rev higher than 3k rpm. And dies sometime when start from stop.
my alternator is not charging properly. The voltage somewhere at 10.45V. And during night after ON light dropping to 10V sometimes.
any idea?
Before this also had bucking issue. So I bypass the ballast resistor. After the bypass, it was ok for few months and had same issue again.
parts change recently :
fuel pump
fuel filter
fuel assembly
fuel injector
exhaust manifold
TPS
fuel regulator
IAC
even after change everything still having bucking issue. Can rev higher than 3k rpm. And dies sometime when start from stop.
my alternator is not charging properly. The voltage somewhere at 10.45V. And during night after ON light dropping to 10V sometimes.
any idea?
Last edited by Kogul; 02-12-2024 at 06:07 AM.
#4
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You didn't state that in your original post. Have you ever changed the fuel filter?
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Your signature needs correcting I think. Here's how.
Default ATTENTION ALL USER: Please read before posting!!!To all users of CF:
PLEASE, before posting technical questions, take some time to help others out, by adding details in the user control panel. There's 2 ways to do this. First, in the upper left corner on the front page of the site, is a menu button labeled UserCP.
After you click on that you'll see this menu:
Please take the time to click on the highlighted sections and fill out the vehicle information for your vehicle. The signature link is also helpful for any additional information like mods done, links to your build or other vehicles owned.
This helps EVERYONE out by informing them immediately about your year, make, model, etc.
These details are necessary for responders to accurately answer your questions without guessing or having to ask what are the specifics of the vehicle you are referring to. You can add these details easily and permanently by creating a signature or adding your truck details to your existing signature.
5 minutes of your time doing this now will save a ton of time and effort later.
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#5
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The alternator not charging properly can cause all sorts of problems. I would fix that before replacing anything else. It could be the alternator, but also could be a bad wire or connection.
#6
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Hi, I’m new to this.
My xj 93 2.5l petrol sputter at rpm 3k. Like not getting enough fuel. I had this issue last time and the fuel pressure was low. So I bypass the ballast resistor and the pressure was in range.
But even the ballast resistor is bypassed, still having this issue. My voltage is lower abit.
what can be the issue?
My xj 93 2.5l petrol sputter at rpm 3k. Like not getting enough fuel. I had this issue last time and the fuel pressure was low. So I bypass the ballast resistor and the pressure was in range.
But even the ballast resistor is bypassed, still having this issue. My voltage is lower abit.
what can be the issue?
#7
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Thanks for the suggestion. i will changed the alternator first. Then i update to u.
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