Welcome to Bimmerfest -- The #1 Online Community for BMW related information! Please enjoy the discussion forums below and share your experiences with the 200,000 current, new and past BMW owners. The forums are broken out by car model and into other special interest sections such as BMW European Delivery and a special forum to voice your questions to the many BMW dealers on the site to assist our members!

Please follow the links below to help get you started!

Go Back   Bimmerfest - BMW Forums > BMW Model Discussions > 3 Series / 4 Series > E36 (1991 - 1999)

E36 (1991 - 1999)
The E36 chassis 3-Series BMW was a huge hit among driving enthusiasts from the first moment the car hit the pavement. The E36 won numerous awards over the years it was produced and is still a favorite of many BMW enthusiasts to this day! -- View the E36 Wiki

Reply
 
Thread Tools Display Modes
  #1  
Old 11-14-2013, 10:54 PM
TravyDrivesCars TravyDrivesCars is offline
Registered User
Location: New York
 
Join Date: Sep 2013
Posts: 11
Mein Auto: 325is
terrible idle and bogging.

so i have a 325is with an m52 swap. M50 intake manifold, fuel rail, and injectors. When i start my car the idle bounces from 1000 to 1500 back and fourth. I cleaned the ICV, Brand new spark plugs, brand new coils. Changed the TPS. replaced the Maf and still none of that fixed my problem. I sprayed carb cleaner, looking for vacuum leaks and the only one i found was the FPR in which i replaced the line sprayed carb cleaner and the leak went away but the idle and bogging is the same. I also tried unplugging my Cam position sensor which i have read worked for some people but car still ran the same. What else could it possibly be? Also I have no Check engine light. Any input is greatly appreciated.

Last edited by TravyDrivesCars; 11-14-2013 at 11:07 PM.
Reply With Quote
Advertisement
  #2  
Old 11-15-2013, 11:32 AM
hornhospital's Avatar
hornhospital hornhospital is offline
D'oh, You kids!
Location: In the Grumpy Chair
 
Join Date: Jan 2008
Posts: 14,322
Mein Auto: 1995 318is / 1993 325is
If you unplugged the cam position sensor and it made no difference, I'd suspect the cam position sensor! It should definitely make a difference if you unplug it....it should get much worse. If it didn't, it's already there.
__________________
Quotes to live by:
guessing gets expensive...drivinfaster
nothing is more expensive than a cheap BMW...c4harpe13

Ken Kanne, Silverhill, AL, E36 Forum Mod/Craigslist addict/Hoarder of all sorts of stuff
BMW-CCA #441426
1995 318is "Bebe"; 1993 325is "Elvira" 1985 635CSi "Katja" 1984 633CSi "Sylvia"
HAVE I HAD MY MEDS YET?

Reply With Quote
  #3  
Old 11-15-2013, 11:52 AM
SoupermanBMW's Avatar
SoupermanBMW SoupermanBMW is offline
Young and dumb
Location: Cooperstown, NY
 
Join Date: Sep 2013
Posts: 220
Mein Auto: 1993 BMW 325i E36.
^ I had a very similar problem and it was my cam and crank sensor
Reply With Quote
  #4  
Old 11-16-2013, 07:07 PM
TravyDrivesCars TravyDrivesCars is offline
Registered User
Location: New York
 
Join Date: Sep 2013
Posts: 11
Mein Auto: 325is
alright so new problems arrived and check engine or check light won't even come on. I drove the car to 7-11 and turn it off. when i went to leave the car would just crank and crank and crank. I looked around the car making sure everything was plugged in and it was, looked at the ignition switch and wires under the dash and everything seemed fine. I wiggled the starting relay under the dash to make sure it was fully seated which it was when a jumper clip(paperclip in a U shape) fell onto my carpet. I was not sure where this was connected since I never knew it was there but i thought nothing of it. this is when it gets odd. After the clip had fallen and thought nothing really of it. I tried starting the car again. and to my surprise the check engine light or check light won't even come on anymore. so i towed it home. Today i checked for fuel & spark. I am getting fuel. Pump runs and i didnt have a test light but I used a multimeter on the injectors and they are working as well. But I am not getting spark. I used the multimeter on the DME harness and im not sure which pins are which but i am getting 12v on half of the pins. I had a another DME from a 97 328is and wanted to see if i plugged it in the check engine light would come on, but the lights still wouldn't come on. So here's to my question, could that paperclip have jumped something around the starting relay to give the DME full power? I am so lost right now on what to do.

Edit:: I also just took apart my DME and it looks absolutely fine. No browning or burns. All solder joints are perfectly fine. Not even any dust on the board and doesn't have any burning smells. And double checked the bulbs in the cluster and swapped them with working ones and still no light.

EditEdit: tried a working ECU, same problem & tried my ecu in another car and it was working.

Last edited by TravyDrivesCars; 11-19-2013 at 08:46 PM.
Reply With Quote
  #5  
Old 11-16-2013, 09:35 PM
dwonda's Avatar
dwonda dwonda is offline
Insane in the membrane!
Location: North Carolina
 
Join Date: Apr 2013
Posts: 2,145
Mein Auto: 1996 328iS
Quote:
Originally Posted by hornhospital View Post
If you unplugged the cam position sensor and it made no difference, I'd suspect the cam position sensor! It should definitely make a difference if you unplug it....it should get much worse. If it didn't, it's already there.
Are you sure about this? I suspect that this would be similar to unplugging something like the MAF, a faulty one can really jerk the **** out of your car, but you can unplug it and the computer will realize there is no sensor connected and revert to default system values. For me when this happened to my MAF, there seemed to be absolutely no difference between having it unplugged and having it plugged in to my new one. Just a thought, I'm probably wrong.
Reply With Quote
  #6  
Old 11-19-2013, 08:45 PM
TravyDrivesCars TravyDrivesCars is offline
Registered User
Location: New York
 
Join Date: Sep 2013
Posts: 11
Mein Auto: 325is
bump
Reply With Quote
  #7  
Old 11-20-2013, 04:18 AM
Homer23 Homer23 is offline
Officially Welcomed to the 'Fest
Location: NC
 
Join Date: May 2013
Posts: 153
Mein Auto: E36 328i
When you try to start your car, try to rev it up at the same time. If it just happens to start, it probably is the crank position sensor. But at the same time, it should be something different since a crank sensor should throw a check engine light.
Reply With Quote
  #8  
Old 11-20-2013, 05:33 AM
SoupermanBMW's Avatar
SoupermanBMW SoupermanBMW is offline
Young and dumb
Location: Cooperstown, NY
 
Join Date: Sep 2013
Posts: 220
Mein Auto: 1993 BMW 325i E36.
Quote:
Originally Posted by Homer23 View Post
When you try to start your car, try to rev it up at the same time. If it just happens to start, it probably is the crank position sensor. But at the same time, it should be something different since a crank sensor should throw a check engine light.
I had a bad crank sensor with no CEL.
__________________
"Halle" 1993 325i, 1993 Mx5 sold, 1995 328i sold, 1993 Nissan NX2000 RIP
Reply With Quote
  #9  
Old 11-20-2013, 12:12 PM
hornhospital's Avatar
hornhospital hornhospital is offline
D'oh, You kids!
Location: In the Grumpy Chair
 
Join Date: Jan 2008
Posts: 14,322
Mein Auto: 1995 318is / 1993 325is
Quote:
Originally Posted by SoupermanBMW View Post
I had a bad crank sensor with no CEL.
Sort-of the same as my experience. Crank sensor went bye-bye, but it threw a knock sensor code!
__________________
Quotes to live by:
guessing gets expensive...drivinfaster
nothing is more expensive than a cheap BMW...c4harpe13

Ken Kanne, Silverhill, AL, E36 Forum Mod/Craigslist addict/Hoarder of all sorts of stuff
BMW-CCA #441426
1995 318is "Bebe"; 1993 325is "Elvira" 1985 635CSi "Katja" 1984 633CSi "Sylvia"
HAVE I HAD MY MEDS YET?

Reply With Quote
  #10  
Old 11-20-2013, 12:18 PM
hornhospital's Avatar
hornhospital hornhospital is offline
D'oh, You kids!
Location: In the Grumpy Chair
 
Join Date: Jan 2008
Posts: 14,322
Mein Auto: 1995 318is / 1993 325is
Quote:
Originally Posted by dwonda View Post
Are you sure about this? I suspect that this would be similar to unplugging something like the MAF, a faulty one can really jerk the **** out of your car, but you can unplug it and the computer will realize there is no sensor connected and revert to default system values. For me when this happened to my MAF, there seemed to be absolutely no difference between having it unplugged and having it plugged in to my new one. Just a thought, I'm probably wrong.
Yes, I'm sure. Try it. The crank sensor is far more important than the MAF. The ECU will default to closed loop if the MAF dies, but when the crank sensor dies, the ECU can't tell the engine is rotating, so it won't fire the injectors or plugs, and it shuts off the fuel pump. The cam sensor is not as critical as the crank sensor, but nearly so. Unplugging it will cause a major reaction, or it should. If it's already dead, the major reaction will already be happening, which is what sounds like is going on with Travy's car.
__________________
Quotes to live by:
guessing gets expensive...drivinfaster
nothing is more expensive than a cheap BMW...c4harpe13

Ken Kanne, Silverhill, AL, E36 Forum Mod/Craigslist addict/Hoarder of all sorts of stuff
BMW-CCA #441426
1995 318is "Bebe"; 1993 325is "Elvira" 1985 635CSi "Katja" 1984 633CSi "Sylvia"
HAVE I HAD MY MEDS YET?

Reply With Quote
  #11  
Old 11-20-2013, 12:20 PM
SoupermanBMW's Avatar
SoupermanBMW SoupermanBMW is offline
Young and dumb
Location: Cooperstown, NY
 
Join Date: Sep 2013
Posts: 220
Mein Auto: 1993 BMW 325i E36.
Quote:
Originally Posted by hornhospital View Post
Sort-of the same as my experience. Crank sensor went bye-bye, but it threw a knock sensor code!
That is EXACTLY what mine did...weird..
Did you replace any of the knock sensors?
__________________
"Halle" 1993 325i, 1993 Mx5 sold, 1995 328i sold, 1993 Nissan NX2000 RIP
Reply With Quote
  #12  
Old 11-20-2013, 07:55 PM
dwonda's Avatar
dwonda dwonda is offline
Insane in the membrane!
Location: North Carolina
 
Join Date: Apr 2013
Posts: 2,145
Mein Auto: 1996 328iS
Quote:
Originally Posted by hornhospital View Post
Yes, I'm sure. Try it. The crank sensor is far more important than the MAF. The ECU will default to closed loop if the MAF dies, but when the crank sensor dies, the ECU can't tell the engine is rotating, so it won't fire the injectors or plugs, and it shuts off the fuel pump. The cam sensor is not as critical as the crank sensor, but nearly so. Unplugging it will cause a major reaction, or it should. If it's already dead, the major reaction will already be happening, which is what sounds like is going on with Travy's car.
Thanks, good to know! Fuc* I'm scared reading about all this ****, when is it going to happen to me?
Reply With Quote
  #13  
Old 11-20-2013, 07:56 PM
TravyDrivesCars TravyDrivesCars is offline
Registered User
Location: New York
 
Join Date: Sep 2013
Posts: 11
Mein Auto: 325is
but my biggest issue is that my check engine light does not come on at all, not with the key forward (not starting). if i can figure out why, then i will start replacing parts.
Reply With Quote
  #14  
Old 11-20-2013, 07:59 PM
dwonda's Avatar
dwonda dwonda is offline
Insane in the membrane!
Location: North Carolina
 
Join Date: Apr 2013
Posts: 2,145
Mein Auto: 1996 328iS
Wow that is strange, all I can think of is checking the actual bulb but I am 99.99% sure that isn't the problem.
Reply With Quote
  #15  
Old 11-20-2013, 09:04 PM
TravyDrivesCars TravyDrivesCars is offline
Registered User
Location: New York
 
Join Date: Sep 2013
Posts: 11
Mein Auto: 325is
Quote:
Originally Posted by dwonda View Post
Wow that is strange, all I can think of is checking the actual bulb but I am 99.99% sure that isn't the problem.
I tried twice. I swapped the ASC and CEL bulbs and the asc still lite up and the cel didn't.
Reply With Quote
  #16  
Old 11-20-2013, 09:07 PM
hornhospital's Avatar
hornhospital hornhospital is offline
D'oh, You kids!
Location: In the Grumpy Chair
 
Join Date: Jan 2008
Posts: 14,322
Mein Auto: 1995 318is / 1993 325is
Pull the IC out again and examine it closely. I'll betcha a previous owner disabled the CEL circuit.
__________________
Quotes to live by:
guessing gets expensive...drivinfaster
nothing is more expensive than a cheap BMW...c4harpe13

Ken Kanne, Silverhill, AL, E36 Forum Mod/Craigslist addict/Hoarder of all sorts of stuff
BMW-CCA #441426
1995 318is "Bebe"; 1993 325is "Elvira" 1985 635CSi "Katja" 1984 633CSi "Sylvia"
HAVE I HAD MY MEDS YET?

Reply With Quote
  #17  
Old 11-20-2013, 09:09 PM
hornhospital's Avatar
hornhospital hornhospital is offline
D'oh, You kids!
Location: In the Grumpy Chair
 
Join Date: Jan 2008
Posts: 14,322
Mein Auto: 1995 318is / 1993 325is
Quote:
Originally Posted by SoupermanBMW View Post
That is EXACTLY what mine did...weird..
Did you replace any of the knock sensors?
Nope. Replaced both the cam and crank sensors (because I figured "I'm there...might as well replace both"), cleared the code, and it hasn't come back.......yet.
__________________
Quotes to live by:
guessing gets expensive...drivinfaster
nothing is more expensive than a cheap BMW...c4harpe13

Ken Kanne, Silverhill, AL, E36 Forum Mod/Craigslist addict/Hoarder of all sorts of stuff
BMW-CCA #441426
1995 318is "Bebe"; 1993 325is "Elvira" 1985 635CSi "Katja" 1984 633CSi "Sylvia"
HAVE I HAD MY MEDS YET?

Reply With Quote
  #18  
Old 11-20-2013, 09:17 PM
dwonda's Avatar
dwonda dwonda is offline
Insane in the membrane!
Location: North Carolina
 
Join Date: Apr 2013
Posts: 2,145
Mein Auto: 1996 328iS
Quote:
Originally Posted by hornhospital View Post
Pull the IC out again and examine it closely. I'll betcha a previous owner disabled the CEL circuit.
Oh I was under the impression it was previously working. Well then as Kid Rock would say "Only God knows why".
Reply With Quote
  #19  
Old 11-20-2013, 09:34 PM
hornhospital's Avatar
hornhospital hornhospital is offline
D'oh, You kids!
Location: In the Grumpy Chair
 
Join Date: Jan 2008
Posts: 14,322
Mein Auto: 1995 318is / 1993 325is
Quote:
Originally Posted by TravyDrivesCars View Post
Also I have no Check engine light.
Just to make sure I went back and re-read the whole thread. That ^ is in the first posting.
__________________
Quotes to live by:
guessing gets expensive...drivinfaster
nothing is more expensive than a cheap BMW...c4harpe13

Ken Kanne, Silverhill, AL, E36 Forum Mod/Craigslist addict/Hoarder of all sorts of stuff
BMW-CCA #441426
1995 318is "Bebe"; 1993 325is "Elvira" 1985 635CSi "Katja" 1984 633CSi "Sylvia"
HAVE I HAD MY MEDS YET?

Reply With Quote
  #20  
Old 11-20-2013, 09:45 PM
TravyDrivesCars TravyDrivesCars is offline
Registered User
Location: New York
 
Join Date: Sep 2013
Posts: 11
Mein Auto: 325is
Quote:
Originally Posted by hornhospital View Post
Just to make sure I went back and re-read the whole thread. That ^ is in the first posting.
Check engine light was working, when the car wouldn't start at 7-11 is when the check engine light stopped working.
Reply With Quote
  #21  
Old 11-20-2013, 09:56 PM
hornhospital's Avatar
hornhospital hornhospital is offline
D'oh, You kids!
Location: In the Grumpy Chair
 
Join Date: Jan 2008
Posts: 14,322
Mein Auto: 1995 318is / 1993 325is
Then it's got to be either a wiring problem, or something wrong with the ECU, regardless of what it looks like. The CEL not working is probably just a symptom of the ills of the rest of the ECU.

Did you do the engine swap, or did you buy it like that?
__________________
Quotes to live by:
guessing gets expensive...drivinfaster
nothing is more expensive than a cheap BMW...c4harpe13

Ken Kanne, Silverhill, AL, E36 Forum Mod/Craigslist addict/Hoarder of all sorts of stuff
BMW-CCA #441426
1995 318is "Bebe"; 1993 325is "Elvira" 1985 635CSi "Katja" 1984 633CSi "Sylvia"
HAVE I HAD MY MEDS YET?

Reply With Quote
  #22  
Old 11-20-2013, 10:07 PM
TravyDrivesCars TravyDrivesCars is offline
Registered User
Location: New York
 
Join Date: Sep 2013
Posts: 11
Mein Auto: 325is
Quote:
Originally Posted by hornhospital View Post
Then it's got to be either a wiring problem, or something wrong with the ECU, regardless of what it looks like. The CEL not working is probably just a symptom of the ills of the rest of the ECU.

Did you do the engine swap, or did you buy it like that?
Heres the thing tho, I tried my ecu in my buddys car & it still worked & i tried his ECU in my car and it had the same problems. I'm getting power to the DME and the ground of the DME is working as well. I did the swap my self. in which I didnt have to fool around with any wiring since i replaced all the sensors from the m50 onto the m52.
Reply With Quote
  #23  
Old 11-20-2013, 10:33 PM
hornhospital's Avatar
hornhospital hornhospital is offline
D'oh, You kids!
Location: In the Grumpy Chair
 
Join Date: Jan 2008
Posts: 14,322
Mein Auto: 1995 318is / 1993 325is
Eliminating the ECU as the problem then points straight at wiring as being the fault....like I said. Either wiring or ECU. You tested it with a known good ECU without change, and your suspect ECU worked in another car. It's going to be a huge PITA, but you're going to have to start tracing and testing wires.
__________________
Quotes to live by:
guessing gets expensive...drivinfaster
nothing is more expensive than a cheap BMW...c4harpe13

Ken Kanne, Silverhill, AL, E36 Forum Mod/Craigslist addict/Hoarder of all sorts of stuff
BMW-CCA #441426
1995 318is "Bebe"; 1993 325is "Elvira" 1985 635CSi "Katja" 1984 633CSi "Sylvia"
HAVE I HAD MY MEDS YET?

Reply With Quote
  #24  
Old 11-20-2013, 10:52 PM
TravyDrivesCars TravyDrivesCars is offline
Registered User
Location: New York
 
Join Date: Sep 2013
Posts: 11
Mein Auto: 325is
Quote:
Originally Posted by hornhospital View Post
Eliminating the ECU as the problem then points straight at wiring as being the fault....like I said. Either wiring or ECU. You tested it with a known good ECU without change, and your suspect ECU worked in another car. It's going to be a huge PITA, but you're going to have to start tracing and testing wires.
yeah man, Hopefully If i have time in the morning before work, i'll do it.

I found this through alldata so maybe it will help me out.

Reply With Quote
  #25  
Old 11-21-2013, 05:58 AM
SoupermanBMW's Avatar
SoupermanBMW SoupermanBMW is offline
Young and dumb
Location: Cooperstown, NY
 
Join Date: Sep 2013
Posts: 220
Mein Auto: 1993 BMW 325i E36.
Quote:
Originally Posted by hornhospital View Post
Nope. Replaced both the cam and crank sensors (because I figured "I'm there...might as well replace both"), cleared the code, and it hasn't come back.......yet.
OK cool becuase i didnt change the knock senors either... After I replaced these things (Crank and Cam Sensor) my car did idle funny and bog down alittle here and there. I replaced my fuel filter, cleaned my TPS, a oil change and SEEE YA! It went away. Dont know if that helps...
__________________
"Halle" 1993 325i, 1993 Mx5 sold, 1995 328i sold, 1993 Nissan NX2000 RIP

Last edited by SoupermanBMW; 11-21-2013 at 05:59 AM.
Reply With Quote
Reply

Bookmarks


Forum Navigation
Go Back   Bimmerfest - BMW Forums > BMW Model Discussions > 3 Series / 4 Series > E36 (1991 - 1999)
Today's Posts Search
Thread Tools
Display Modes

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 On



Forum Jump


All times are GMT -7. The time now is 11:12 PM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2014, vBulletin Solutions, Inc.
© 2001-2011 performanceIX, Inc. All Rights Reserved .: guidelines .:. privacy .:. terms