water pump causes poor acceleration - JeepForum.com
 
LinkBack Thread Tools
post #1 of 8 Old 06-15-2013, 02:29 PM Thread Starter
BeDifferent
Registered User
1995 ZJ 
 
Join Date: Nov 2012
Location: Powell
Posts: 109
water pump causes poor acceleration

What would cause bog-down when accelerating up-hill?
add; grand-limited-5.2- was accelerating fine before leaving...

Driving to Kentucky from Knoxville, accelerate to pass is good on way there, then higher elevation and starts bogging down when trying to pass on those uphill ‘truck passing lane’ areas, = they are short and require a “foot down” to pass before the lane ends and two vehicles are side by side.

I was thinking it was due to elevation, maybe the computer was not compensating enough for thinner air -- but on the way back the condition became worse. Ease on to the throttle and we speed up with ‘ease’, but accelerate hard, even on level ground and it bogs, I checked the TV-cable, it is not broken or disconnected.
Next thing is when I got home and stopped, water began pouring out at the center/ uh water pump area. Next day verified that the water is leaking at the pump’s shaft out-to-pulley area.
?? Faulty water pump causes poor acceleration?? That makes no sense.

Things to do tomorrow,
check plugs for fouling.
Check throttle cable and TV cable travel.
Check plug wires … tuneup with new wires was done only 2 months ago, and this is not my daily driver.

I gladly listen to the voice of experience;


Jeep Grand Cherokee 1995 v8 5.2 205000
BeDifferent is offline  
Sponsored Links
Advertisement
 
post #2 of 8 Old 06-15-2013, 03:36 PM
jm8881
Registered User
1996 ZJ 
 
Join Date: Oct 2005
Location: Palm Desert
Posts: 823
How hot was it getting with that bad waterpump?
jm8881 is online now  
post #3 of 8 Old 06-15-2013, 04:02 PM
Pierre_r
Senior Member
 
Pierre_r's Avatar
1989 XJ Cherokee 
 
Join Date: Jul 2009
Location: Sweden
Posts: 907
So how long ago was it since you changed the fuel and airfilter?.
Because that is usualy what happends if one of those filters are clogged (exept the waterleak)
Pierre_r is offline  
post #4 of 8 Old 06-15-2013, 04:39 PM Thread Starter
BeDifferent
Registered User
1995 ZJ 
 
Join Date: Nov 2012
Location: Powell
Posts: 109
right, thanks ..

fuel filter 5 months ago, air filter 1 month ago,
and the odd thing about the water pump, temps stayed at about 180 all the way home, just my luck that it only really poured out when I stopped in my driveway.

I was hoping to fix whatever with the engine while I have the tools out for the water pump.

full tuneup 5 months ago, and the 'ease on pedal = accelerate no problem' that leaves me unsure of were to look for the problems solution, / since my earliest opportunity to investigate further is tomorrow, I am gathering as many "where to look next" ideas as I can, possible some debris got to the cold intake and partial blocked there...

Jeep Grand Cherokee 1995 v8 5.2 205000
BeDifferent is offline  
post #5 of 8 Old 06-23-2013, 06:54 PM Thread Starter
BeDifferent
Registered User
1995 ZJ 
 
Join Date: Nov 2012
Location: Powell
Posts: 109
AND While replacing the water pump, noticed the ?short return water hose? under the support brace looked puffed up, replaced that and the pump.
Then, it "just came to me" even though I had replace the fuel filter in December, I had planned to do that again about now. So replaced fuel filter.

I dont know what that sort hose is supposed to do, but I do know it is a serious project to replace.

The bogging down on acceleration is gone. -- the first time the fuel filter poured out some black "stuff" -- this time it looked clean, But engine runs fine now.

SO; bogging down = check obstructions, air filter, TPS, and fuel filter ....

Jeep Grand Cherokee 1995 v8 5.2 205000
BeDifferent is offline  
post #6 of 8 Old 06-24-2013, 06:44 PM
dusterdude
Registered User
1996 ZJ 
 
Join Date: Jan 2012
Location: hopewell
Posts: 2,048
Short hose is the bypass hose
dusterdude is offline  
post #7 of 8 Old 06-30-2013, 03:08 PM Thread Starter
BeDifferent
Registered User
1995 ZJ 
 
Join Date: Nov 2012
Location: Powell
Posts: 109
Still Bogging Down, battery is good, alt is good, new TPS, air filter new, TVcable is good,
--- see above, when I replaced the fuel filter, the problem seemed to go away -- but that was only momentary.

runs normal, revs normal, drives slow normal, but accelerate and it acts like it cant make up its mind to go or slow = rapid rev up and slow down -repeats as long as pressing accelerator,
let off and just ease on to the accelerator and it will run on down the street.

the cat is bad, the tailpipe is open between the cat and muffler, (parts on order) is that something that would cause the erratic acceleration?

Jeep Grand Cherokee 1995 v8 5.2 205000
BeDifferent is offline  
post #8 of 8 Old 06-30-2013, 03:52 PM
kachink
Registered User
1998 ZJ 
 
Join Date: Sep 2010
Location: Lake Forest
Posts: 779
If the cat is disintegrating inside it can partially block exhaust flow and cause those symptoms. The blockage is not complete, so it's only noticeable in high flow situations.
kachink is offline  
Reply

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the JeepForum.com forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a valid e-mail address for yourself.



Email Address:
OR

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.




Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page



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 On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome