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Old 01-23-2011, 01:15 AM   #1
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New member - have a problem

Hello guys,

I recently traded my honda civic for a jeep yj 1995 , 2.5L fuel injection, its a very fun car, i love the looking and how simple and "antique" feeling it gives me

The trader told me the car needs a new fuel pump. The car is hesiatating sometimes and i dont have much power. The shift light tells me to shift but its really slow so i have to shift at 3000RPM instead.

When the car starts hesitating, i will hear knocking sound , like knocking a tank or something. Then no matter how much gas i give, it will only allow me to be max at 70km/h.

I have to turn off the car and turn it back on in middle of the high way in order to have it normal a gain. Car is very slow at acceleration (compared to civic) but i can feel the torque. I'm on 2wd mode to save gas because my fuel gauge does not work.

Is this really fuel pump problem? Thank you very much. Here's my YJ


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Old 01-23-2011, 02:28 AM   #2
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Check the trouble codes. Turn the key to on,( not start) and back to off three times and leave it in on/run. The check ingine light will flash a "trouble code". That should give you a place to start. Sounds like it could be the O2 sensor, but might be some thing els. Check the codes.

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Old 01-23-2011, 02:33 AM   #3
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ps. It wont be "antique" untill 2020!
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Old 01-23-2011, 02:50 AM   #4
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Quote:
Originally Posted by armadillo View Post
ps. It wont be "antique" untill 2020!
And it will never be a "car"...and I have no idea on how to help but I would take it to a mechanic...

In all my experience with fuel pumps, they just go out. They may keep working but in my Dodge diesel and my brothers Dodge diesel, the fuel pumps just went out like somebody flipped a switch. so like I said, take it to a professional
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Old 01-23-2011, 12:54 PM   #5
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With the 2.5 you will NEVER have a lot of power. The knocking and loss of power could be a timing issue.Like someone said, check for codes, could be a bad sensor. When was the last time it was tuned up?
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Old 01-24-2011, 01:08 AM   #6
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The previous owner only changed engine oil and filter. Nothing else. I tried getting the engine code it doesnt work. Tried turn on off on off on off 3 times in a row then on , no engine codes?

What tune up should i make that would affect performance this much? spark plugs?

It seems theres nothing wrong with the fuel pump my neighbour said. He said its probably a sensor
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Old 01-24-2011, 01:48 AM   #7
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just change all of it..spark plugs, air filter, catalytic converter, oil, flush the radiator..start over then you know what it's not...
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Old 01-24-2011, 02:48 AM   #8
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At the very least you should get a 55 code. Maybe the PO puled the check engine light bulb like mine did. There is a post on here some where that explaines how to check and read the codes much better than I can.
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Old 01-24-2011, 04:04 AM   #9
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When checking the codes on your JEEP (not a CAR). cycle your key to the on position three times. (on-off-on-off-on-off-on) then count the number of times it flashes. like previously stated you should atleast get 55. As far as tune up, when i bought mine had the same sluggish pick-up. (it's a 4 banger!), however with a tune you should notice the difference. Also check the cranksensor.
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Old 01-25-2011, 01:21 AM   #10
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sorry i keep saying my car, i never had a jeep haha , thank you very much for your suggestion. I guess the check engine light bulb was pulled out cause i get nothing !!

How do you remove that dash to check? Thanks everyone for your time !!! To help the cranking and cold start (-35 degree) my neighbour sprayed some nitro into the intake filter, it really helps it crank. Still need about 3-4 times of little spray in order to get it started.

After its started, it will stall right away even i put my foot on the gas pedal a bit .... it will keep stalling for like 2-3 times then it will finally want to take the gas and help the idle and have it warm up ....

On cold start like this, my ignition trumbler is extremely hard to turn but after its warmed up the car, it cranks ok but still a bit hard.
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Old 01-25-2011, 01:26 AM   #11
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I probably wouldn't mess with your dash when it is that cold..plastic has tendency to break when it is warm outside let alone cold and brittle..did you try replacing everything?
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Old 01-25-2011, 06:34 AM   #12
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I'd also change the fuel filter. Could be you're getting clogged.
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Old 01-25-2011, 11:45 AM   #13
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-35 F , I'm amazed it starts at all. You need a block heater to keep things toasty when your not driving it. One cold start, below 32F, is equal to 5000 miles of wear on your engine.
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Old 01-25-2011, 11:47 AM   #14
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-35 F , I'm amazed it starts at all. You need a block heater to keep things toasty when your not driving it. One cold start, below 32F, is equal to 5000 miles of wear on your engine.
Where you here that?
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Old 01-25-2011, 02:22 PM   #15
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yes keep that thing warm but to check to see if the bulb is pulled in dash is only two screws and there are two little clips that when you remove the screws you slide that cover down then pull out. Right behind the steeringwheel where there is the turn signal indicators is where it will be. Look for the two screws on top of that panel undernieth where the dash hangs over a bit. I would aswell just replace everything that is regular maintenance. Air filter spark plugs, wires, distributor cap, rotor button and change oil and filter, fuel filter. But if you check to see if there is a bulb or working bulb or not then fix that first and get your code. You might be able to avoid all of that but if you don't know for sure exhactly what has been repaired or maintained i would do that cause it's the safest and not that expensive. Your fuel pump is fine but there is always a possiblity of a leak from a cracked hose especially if its that friggin cold.

How many miles (kilometers)?
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Old 01-25-2011, 02:41 PM   #16
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is there a cover to that snorkel? It looks open on top from the pic letting snow fall right into it. If that thing is wide open, cover it, remove it, angle it down, something...
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Old 01-25-2011, 06:28 PM   #17
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Quote:
Originally Posted by ayashifx55 View Post
The previous owner only changed engine oil and filter. Nothing else. I tried getting the engine code it doesnt work. Tried turn on off on off on off 3 times in a row then on , no engine codes?

What tune up should i make that would affect performance this much? spark plugs?

It seems theres nothing wrong with the fuel pump my neighbour said. He said its probably a sensor
Does your check engine light (CEL) come on at all if you just set the key to "On" before starting? Do you hear the fuel pump?
If the PO only did oil changes, you should at least check the condition of the spark plugs, plug wires, distributor, dizzy rotor, and air filter. Definitely change your fuel filter.

I ignore my shift light.
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Old 01-25-2011, 07:27 PM   #18
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-35 F , I'm amazed it starts at all. You need a block heater to keep things toasty when your not driving it. One cold start, below 32F, is equal to 5000 miles of wear on your engine.
In the mid 1980s when the Series 60 Detroit Diesel was new a service rep from Detroit came and gave us an orentation. Granted 12.7 liter diesel engine versus 4.0, but still if you can avoid a "cold start" why not.
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Old 01-26-2011, 10:05 AM   #19
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Does your check engine light (CEL) come on at all if you just set the key to "On" before starting? Do you hear the fuel pump?
If the PO only did oil changes, you should at least check the condition of the spark plugs, plug wires, distributor, dizzy rotor, and air filter. Definitely change your fuel filter.

I ignore my shift light.
The only light that is on is the seat belt light.
I hear a loud fuel pump sound coming from the back so the fuel pump is probably healthy. Will do !!

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