replaced waterpump and thermostat and now car runs rough - BMW Forum - BimmerWerkz.com
3-Series (E36) Chat relating to the BMW 3-Series from 1992-1999. Autodoodad Specific models include: BMW 316i, BMW 318i, BMW 318iS/ti, BMW 320, BMW 323, BMW 320, BMW 324, BMW 325, BMW 328.

Reply
 
LinkBack Thread Tools Display Modes
#1 (permalink) Old 12-09-2011, 09:14 PM
n00b
 
Join Date: Oct 2011
Posts: 35
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Acid0atm3al is on a distinguished road
(Thread Starter)
replaced waterpump and thermostat and now car runs rough

while out running errands today my factory waterpump (orange plastic impeller) went out. car got into the red for a short amount of time. replaced the waterpump and thermostat, and all related gaskets and now the car runs like it is missing on one or more cylinders.

anyone have any ideas? i took it out for a 20 mile trip to make sure the cooling system was well bled and to see if the problem would clear up. still doing the same thing..... I'm REALLY hoping that I didnt blow my headgasket...

after the trip I checked the oil and coolant for contamination, so far so good.
Acid0atm3al is offline  
Sponsored Links
Advertisement
 
#2 (permalink) Old 12-10-2011, 01:05 AM
Neutral Member
 
Join Date: Sep 2011
Posts: 56
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
beewee is on a distinguished road
check the sparkplug cable maybe its just accidentally removed.
after that, next suspect will be your fuel pump, how old it is.

or might be just some air leaks.
beewee is offline  
#3 (permalink) Old 12-10-2011, 04:53 AM
42, The meaning of life
 
brettski's Avatar
 
Join Date: Jul 2009
Location: Melbourne, Australia
Posts: 2,405
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
brettski is just really nice brettski is just really nice brettski is just really nice brettski is just really nice brettski is just really nice
Are there any temperature sensor that you removed in the process of changing the water pump, did they all go back into place and get connected properly?


Riding in style
brettski is offline  
#4 (permalink) Old 12-10-2011, 10:07 AM
n00b
 
Join Date: Oct 2011
Posts: 35
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Acid0atm3al is on a distinguished road
(Thread Starter)
the only sensors i removed is the coolant level sensor on the bottom of the surge tank, and the (temp?) sensor on the side of the radiator.

i did however remove the ac condenser, so the condenser fan plug is not hooked up to anything.

beewee: are you referring to the coilpack ground wire that goes on one of the waterpump bolts? if so, it was reinstalled.
Acid0atm3al is offline  
#5 (permalink) Old 12-10-2011, 10:10 AM
n00b
 
Join Date: Oct 2011
Posts: 35
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Acid0atm3al is on a distinguished road
(Thread Starter)
last time i changed the plugs i did notice a tiny bit of oil in the plug recesses in the head, do you think that when the engine got hot that the plug hole seals could have leaked more oil into the plug holes? i know from exp that can cause similar problems. guess i'll pull the coil packs today and check.
Acid0atm3al is offline  
#6 (permalink) Old 12-10-2011, 01:05 PM
Captain... Savvy ?
 
Jack Dabsy's Avatar
 
Join Date: Apr 2011
Location: Barnsley UK
Posts: 2,194
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Jack Dabsy will become famous soon enough
Garage
Any errors on the dash?


Eso es todo!
Please press the "REP" button if you are happy with your response/answer...

Please JOIN, or just have a look... Its Totally FREE...
BMW Part Market

BMW Online Manuals (TIS)

New Member ?
Jack Dabsy is offline  
#7 (permalink) Old 12-10-2011, 01:52 PM
n00b
 
Join Date: Oct 2011
Posts: 35
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Acid0atm3al is on a distinguished road
(Thread Starter)
no check engine light.

did dome troubleshooting, the 3rd coil from the rear of the engine isnt firing. have continuity from the coil plug to the wire splices where they all bundle together...

have swapped coils with another cylinder and still not getting anything.... im at a loss...
Acid0atm3al is offline  
#8 (permalink) Old 12-10-2011, 02:09 PM
Captain... Savvy ?
 
Jack Dabsy's Avatar
 
Join Date: Apr 2011
Location: Barnsley UK
Posts: 2,194
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Jack Dabsy will become famous soon enough
Garage
At coil or at spark-plug?


Eso es todo!
Please press the "REP" button if you are happy with your response/answer...

Please JOIN, or just have a look... Its Totally FREE...
BMW Part Market

BMW Online Manuals (TIS)

New Member ?
Jack Dabsy is offline  
#9 (permalink) Old 12-10-2011, 02:27 PM
n00b
 
Join Date: Oct 2011
Posts: 35
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Acid0atm3al is on a distinguished road
(Thread Starter)
the coil itself isnt firing... i dont understand, maybe there is a problem with the wiring harness to that coil. but i dont have any idea how to troubleshoot it.
Acid0atm3al is offline  
#10 (permalink) Old 12-10-2011, 02:59 PM
n00b
 
Join Date: Oct 2011
Posts: 35
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Acid0atm3al is on a distinguished road
(Thread Starter)
well, after further troubleshooting, i have found that the #4 coil is not getting signal to fire, all other cylinders will pulse voltage on the two outer pins of the coil connector... wtf could cause this?
Acid0atm3al is offline  
#11 (permalink) Old 12-10-2011, 03:38 PM
n00b
 
Join Date: Oct 2011
Posts: 35
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Acid0atm3al is on a distinguished road
(Thread Starter)
after even further troubleshooting i found that pin number 50 is the wire that supplies a positive signal to the coil telling it to fire. i checked for continuity between pin 50 at the ecu and the black wire on the coil plug, continuity across the whole wire... so basically... i have a bad ecu/dme right?

Is there anything that i could have done to fry the ecu in such a way when doing the waterpump? or is this a freak coincidence?
Acid0atm3al is offline  
#12 (permalink) Old 12-10-2011, 09:07 PM
Neutral Member
 
Join Date: Sep 2011
Posts: 56
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
beewee is on a distinguished road
coincidence. nope, I mean the sparkplug wires or the sparkplug itself.
By the way, as I was asking How old is your Fuel pump?
are you sure there are no air leaks?

sometimes during the process, we remove some hose that we fail to return.
beewee is offline  
#13 (permalink) Old 12-10-2011, 09:54 PM
n00b
 
Join Date: Oct 2011
Posts: 35
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Acid0atm3al is on a distinguished road
(Thread Starter)
fuel pump isnt too old, and i have proper fuel pressure.

there is no sparkplug wire, its coil on plug.
Acid0atm3al is offline  
#14 (permalink) Old 12-11-2011, 07:12 AM
Captain... Savvy ?
 
Jack Dabsy's Avatar
 
Join Date: Apr 2011
Location: Barnsley UK
Posts: 2,194
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Jack Dabsy will become famous soon enough
Garage
If you swapped the coil and that same coil has failed on a different cylinder then that coil needs replacing.


Eso es todo!
Please press the "REP" button if you are happy with your response/answer...

Please JOIN, or just have a look... Its Totally FREE...
BMW Part Market

BMW Online Manuals (TIS)

New Member ?
Jack Dabsy is offline  
#15 (permalink) Old 12-11-2011, 08:49 PM
n00b
 
Join Date: Oct 2011
Posts: 35
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Acid0atm3al is on a distinguished road
(Thread Starter)
no, the coil worked on the other cylinder. #4 remained dead
Acid0atm3al is offline  
Sponsored Links
Advertisement
 
Reply

  BMW Forum - BimmerWerkz.com > BMW Model Specific Forums > 3-Series (E36)


Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
User Tag List

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



Similar Threads
Thread Thread Starter Forum Replies Last Post
Rough idle since clutch replaced wayned 5-Series (E12,E28, E34, E39, E60) 3 09-24-2011 04:51 PM
Car runs rough after turning on a/c coachashea 3-Series (E36) 2 08-02-2011 10:44 PM
Replaced Head, rough idle and lots of white smoke countryroads 3-Series (E21, E30) 5 03-26-2009 06:59 PM
Thermostat replacement- time for new waterpump? maxslomoff 3-Series (E36) 10 12-23-2008 03:25 AM
Rough Idle At Start Only - Once Hot Runs Fine streetdreams 3-Series (E36) 1 11-30-2004 01:55 AM

Posting Rules  
You may not post new threads
You may not 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