violent shaking and power loss surges? - Jeep Wrangler Forum
Jeep Wrangler Forum

Go Back   Jeep Wrangler Forum > TJ Jeep Wrangler Forum > TJ Tech Forum

Join Wrangler Forum Today


Reply
 
Thread Tools

Please support our sponsors and let them know you heard about them on WranglerForum.com
Old 12-08-2012, 10:57 AM   #1
Newb
 
Join Date: Dec 2012
Posts: 3
violent shaking and power loss surges?

I have a 98 SE 4 cylinder 4x4 no lift kits and standard tires. I have been having 2 problems lately and I'm not sure what they are. I haven't had much free time to get under and check but I will in the next couple of weeks, so just trying to get an idea of what to look for.

1. I have been having a problem of when I get around 60-65 my jeep start doing a power loss surge. It almost feels like I just pumped the clutch really fast. I loose all power from the engine. No warning lights come on. If I stay under 60 it doesn't do it and if I go up to or above 70 it rarely does this.

2. Sometimes at any speed my jeep starts to violently shake. It seems to do this most at around 40-45 but at speeds around 20-30 I can feel it but it isn't nearly as bad. When it starts to shake most of the time I can either drastically speed up or slow down and it stops. I was think maybe a engine mount was going bad but figured that it would shake all the time even in ideal if that was the case. I read somewhere on a different site that someone with some what of the same issue was either the balancing of the tires or the U or J joints. Just wanted a 2nd opinion.

One last thing. I'm pretty sure the answer is just because it is a 4 cylinder but my jeep !sucks! at going up hills. I can start at 60 and go up a hill for maybe a quarter mile and I will drop down to maybe 45-50. figure it is just the engine size. But for such a small engine she sure loves chugging down the fuel! LOL!

Any help would be greatly appreciated

11Bforlife is offline   Quote Quick Reply
Old 12-08-2012, 11:13 AM   #2
Knows a couple things...

WF Supporting Member
 
Jerry Bransford's Avatar
 
Join Date: Nov 2005
Location: Escondido, Calif.
Posts: 31,777
Images: 2
Ha on your cool user name... that MOS was called "11-Bush" when I was in many years ago.

Your shaking is very likely the all-too-common Death Wobble. That is normally triggered by an out of balance tire or bump in the road & allowed to develop into full-blown Death Wobble by something loose in the front-end like a bad ball joint, bad bushing, etc.

The first thing I'd do is have all your tires very carefully balanced so they are perfectly balanced. The "good enough" that some tire shops balance tires to is not good enough where a Jeep and Death Wobble is concerned.

Then, or maybe even now, I'd grab someone to help you look to see if something is loose/moving that shouldn't be. With the tires on the ground, have a helper turn the steering wheel repeatedly back & forth while you look at all of the front-end components for unwanted side-to-side movement... particularly the passenger-side track bar mount, control arms, tie-rod ends, etc. Caution that there is supposed to be normal 'rotational' movement for the tie rod and drag link since they are mounted on ball joints... but they should not have any side-to-side slop at all.

So Death Wobble is normally a combination of things... typically out of balance tires combined with something loose like a loose passenger-side track bar mount which should have zero movement.

Power-wise, yep that 2.5L engine is no powerhouse... just make sure you're downshifting early enough for hills.

Finally, make sure your toe-in setting is proper. Improper toe-in can encourage Death Wobble. The following link will tell you how to set your own toe-in. It also includes a cool photo of the front end that will identify the above mentioned items like the track bar.

Basic Jeep Front End Alignment

Good luck with the Death Wobble... it can be frustrating and sometimes hard to cure but it is curable with a little effort.

__________________
Remember that having a different opinion doesn't also require one to be a jerk when expressing it.

When you have a choice, buy American.

Jerry Bransford is online now   Quote Quick Reply
Old 12-08-2012, 11:21 AM   #3
Newb
 
Join Date: Dec 2012
Posts: 3
Thank you. That does sound like something I heard before. But do you have any idea about the power loss surge?
11Bforlife is offline   Quote Quick Reply
Old 12-08-2012, 11:26 AM   #4
Knows a couple things...

WF Supporting Member
 
Jerry Bransford's Avatar
 
Join Date: Nov 2005
Location: Escondido, Calif.
Posts: 31,777
Images: 2
I dunno, when is the last time you did a full tuneup on the engine? It might even have a bad 02 sensor if it has a lot of miles on it. Bad 02 sensors can cause an engine to run like crap because they can completely screw up the engine's air-fuel mixture.
__________________
Remember that having a different opinion doesn't also require one to be a jerk when expressing it.

When you have a choice, buy American.

Jerry Bransford is online now   Quote Quick Reply
Old 12-08-2012, 11:29 AM   #5
Newb
 
Join Date: Dec 2012
Posts: 3
in late June I did pretty much a full tune up. I try to do one twice a year before I make the 700 mile drive home for leave. This might be one to take to the shop for. I'm good at fixing things but not diagnosing at all.
11Bforlife is offline   Quote Quick Reply
Reply

Quick Reply
Message:
Options

Register Now

In order to be able to post messages on the Jeep Wrangler Forum forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.
User Name:
If you do not want to register, fill this field only and the name will be used as user name for your post.
Password
Please enter a password for your user account. Note that passwords are case-sensitive.
Password:
Confirm Password:
Email Address
Please enter a valid email address for yourself.
Email Address:

Log-in

Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.



Thread Tools

Posting Rules
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off




» Featured Product

All times are GMT -5. The time now is 09:33 AM.



Jeep®, Wrangler, Liberty, Wagoneer, Cherokee, and Grand Cherokee are copyrighted and trademarked to Chrysler Motors LLC.
Wranglerforum.com is not in any way associated with the Chrysler Motors LLC