Engine knock, vibrates on acceleration, rough idle - Ford Powerstroke Diesel Forum
User Tag List

Reply
 
LinkBack Thread Tools Display Modes
post #1 of 13 Old 06-25-2012, 09:18 PM Thread Starter
Member
 
Join Date: May 2011
Posts: 43
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Thanks: 0
Thanked 0 Times in 0 Posts
Feedback Score: 0 reviews
Engine knock, vibrates on acceleration, rough idle

I have a 2000 F250 7.3 . I had an engine knock that seemed to come from the water pump. Now the knock has gone away. It still idles rough and vibrates on acceleration. Could it be a clutch fan? Harmonic balancer? There is no service engine light on. Started right after I filled it with fuel this tank.
Thanks
WackerCattle is offline  
Sponsored Links
Advertisement
 
post #2 of 13 Old 06-25-2012, 09:25 PM
Compression Ignition Addict
 
JJFLASH's Avatar
 
Join Date: Jan 2010
Location: unvrhrdofit, SK
Posts: 7,015
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Thanks: 0
Thanked 44 Times in 43 Posts
Feedback Score: 0 reviews
Could be a bunch of stuff dude. My guess would a miss which again can be caused by a few things. How handy and knowledgeable are you? I would start with a thorough exam of your UVCH and associated wiring. Need this explained?


-JJ-

Mine - 94.5 F250 ZF5: Basics w/a few extras, DIY bumper, steps and exhaust, AFEII, D60, PMF 2.25 RSK, V-codes
Hers - 04 GM 2500 CCSB 4x4: LB7, EFI Live by KW, 2" Lift, MBRP 4" dp back
Backup - 98 GM 1500 ECSB 4x4: 6.5, straight pipe, K+N filter, 495km w/original pump, trans & t-case
JJFLASH is offline  
post #3 of 13 Old 06-26-2012, 01:38 AM
Compression Ignition Addict
 
Turbostang500's Avatar
 
Join Date: Oct 2011
Location: Dover
Posts: 1,634
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 1 Post(s)
Thanks: 1
Thanked 0 Times in 0 Posts
Feedback Score: 0 reviews
X2
Sounds like a miss fire. Could be quite a few things.
any smoke?

Lee

2000 F250 PSD SCSB 4X4 418k miles straight pipe gauges 2" leveling kit 315/75r16's
6637 with custom intake pipe. TS Performance 6 position chip!
[/URL]


Please don't confuse my attitude with my personality.. my personality is who I am,my attitude depends on who you are...
Turbostang500 is offline  
post #4 of 13 Old 06-26-2012, 04:50 PM Thread Starter
Member
 
Join Date: May 2011
Posts: 43
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Thanks: 0
Thanked 0 Times in 0 Posts
Feedback Score: 0 reviews
I just did the under valve cover fix. There is no check engine light. I have a Superchip 1805 programmer that I can pull codes with. It's the knock that comes and goes that worries me. With a stethoscope it comes from the water pump.No smoke.

Last edited by WackerCattle; 06-26-2012 at 06:19 PM.
WackerCattle is offline  
post #5 of 13 Old 06-26-2012, 07:00 PM
Compression Ignition Addict
 
Turbostang500's Avatar
 
Join Date: Oct 2011
Location: Dover
Posts: 1,634
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 1 Post(s)
Thanks: 1
Thanked 0 Times in 0 Posts
Feedback Score: 0 reviews
I don't know of any reason a water pump would knock but maybe the knock is just in the front of the engine. (I am thinking this is what you meant)

A faulty injector can cause a knocking sound in the engine also and create the shaking.

If you can't do a contribution test then I would have someone else do it for you and see if there is an injector problem.

Lee

2000 F250 PSD SCSB 4X4 418k miles straight pipe gauges 2" leveling kit 315/75r16's
6637 with custom intake pipe. TS Performance 6 position chip!
[/URL]


Please don't confuse my attitude with my personality.. my personality is who I am,my attitude depends on who you are...
Turbostang500 is offline  
post #6 of 13 Old 06-26-2012, 09:00 PM Thread Starter
Member
 
Join Date: May 2011
Posts: 43
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Thanks: 0
Thanked 0 Times in 0 Posts
Feedback Score: 0 reviews
Is that a "buzz" test? I have a buddy that can do that, may have to borrow his machine. I was thinking there was no reason for a water pump to knock, but Powerstrokes are in their own little world. The fact that it "went away" made me wonder. Thanks!
WackerCattle is offline  
post #7 of 13 Old 06-26-2012, 09:07 PM
Compression Ignition Addict
 
Turbostang500's Avatar
 
Join Date: Oct 2011
Location: Dover
Posts: 1,634
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 1 Post(s)
Thanks: 1
Thanked 0 Times in 0 Posts
Feedback Score: 0 reviews
A buzz test is different but usually along with a contribution test.

If it can run a buzz test i think it can also do the contr. test

The buzz test just sends a signal to each injector to pulse and you have to listen to the sound or lack of.

The contr test, through the pcm, cuts one cyl at a time and calculates how much ot is contributing to the engine. This tests the overall condition of each cyl like rings, valves, injector, cam lobes, head gaskets.

Both are just a start but can highlight an area that you may want to concetrate on.

Lee

2000 F250 PSD SCSB 4X4 418k miles straight pipe gauges 2" leveling kit 315/75r16's
6637 with custom intake pipe. TS Performance 6 position chip!
[/URL]


Please don't confuse my attitude with my personality.. my personality is who I am,my attitude depends on who you are...
Turbostang500 is offline  
post #8 of 13 Old 06-26-2012, 09:33 PM Thread Starter
Member
 
Join Date: May 2011
Posts: 43
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Thanks: 0
Thanked 0 Times in 0 Posts
Feedback Score: 0 reviews
Cool, I'll have to do that. Thanks!
WackerCattle is offline  
post #9 of 13 Old 06-26-2012, 09:38 PM
Compression Ignition Addict
 
Turbostang500's Avatar
 
Join Date: Oct 2011
Location: Dover
Posts: 1,634
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 1 Post(s)
Thanks: 1
Thanked 0 Times in 0 Posts
Feedback Score: 0 reviews
No prob

Lee

2000 F250 PSD SCSB 4X4 418k miles straight pipe gauges 2" leveling kit 315/75r16's
6637 with custom intake pipe. TS Performance 6 position chip!
[/URL]


Please don't confuse my attitude with my personality.. my personality is who I am,my attitude depends on who you are...
Turbostang500 is offline  
post #10 of 13 Old 06-27-2012, 05:05 AM
Compression Ignition Addict
 
JJFLASH's Avatar
 
Join Date: Jan 2010
Location: unvrhrdofit, SK
Posts: 7,015
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Thanks: 0
Thanked 44 Times in 43 Posts
Feedback Score: 0 reviews
What do you mean by "UVCH fix"? I would still inspect it.

Agreed with running the buzz test and contribution test.

If you just had work done to your UVCH it is possible that an injector isn't plugged in properly or one of the other plugs has separated or something along those lines.

Oh and of course the obvious (to me) question...did you try a new CPS? That is the FIRST thing I do to any 7.3 I deal with that has ANY kind of issue unless it's blatantly obvious. Those stupid CPS can be responsible for every symptom possible.


-JJ-

Mine - 94.5 F250 ZF5: Basics w/a few extras, DIY bumper, steps and exhaust, AFEII, D60, PMF 2.25 RSK, V-codes
Hers - 04 GM 2500 CCSB 4x4: LB7, EFI Live by KW, 2" Lift, MBRP 4" dp back
Backup - 98 GM 1500 ECSB 4x4: 6.5, straight pipe, K+N filter, 495km w/original pump, trans & t-case
JJFLASH is offline  
Sponsored Links
Advertisement
 
Reply

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the Ford Powerstroke Diesel 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:
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:
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.



Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode



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 On
Pingbacks are On
Refbacks are On

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