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E34 (1989 - 1995)

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  #1  
Old 01-11-2013, 05:32 AM
E34_Obsession E34_Obsession is offline
"The sound of the M50"
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91 525i Wants to start but refuses too

This is a vehicle with the M50B25. So I parked the vehicle for about a week and when I went back to start the car, it refused to. Been working on the car via the Bentley Manual and checked everything. The car does backfire and pop while cranking but It will not fire up! It almost seems like it wants to start but it wont! Here is a list of components I've checked with the correct tools and are good:
Fuel pump, replaced fuel filter, air filter, all six coils work and throw a strong spark, all six injectors spray fuel. All six cylinders have compression, camshaft and crankshaft position sensors are good, MAF is good, ICV is good, no DME codes, occasionally I will get a "TRANSS PRGRM" but disappears after little time, battery and starter good is cranking at high enough speed, all fuses and relays swapped with a friends car and still nothing. Pump clicks on while cranking.

Please help!!!! If you need more info or a video posted to youtube.com to see the cars behavior please let me know!!!

__________________
1991 BMW E34 525iA

1999 Toyota Tacoma Prerunner Xtracab 2.7L

2008 Toyota Tacoma Prerunner DCSB TRD Sport

1995 Toyota Tacoma 2WD DX V6 - SOLD

1992 Toyota Pickup - SOLD

2003 Subaru Forester 2.5X - TOTALLED

2004 Subaru Forester 2.5XT - SOLD

2005 Subaru WRX Sedan - SOLD

Last edited by E34_Obsession; 01-29-2013 at 07:26 PM.
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  #2  
Old 01-11-2013, 06:16 AM
Monsignor's Avatar
Monsignor Monsignor is offline
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Location: Pineapple Under the Sea
 
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Mein Auto: M50 Big Body
You have a thread posted in late November into December about a no-start but it turned into a pissing match with other members. Did you ever find the solution? If so, what was it?

I assume you did as deductive reasoning would hold that the car was running a week ago.

Sent from Joe's Galaxy SIII via BimmerApp
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1995 525iA 250k mi
2006 325i/6 57k mi
2003 350Z 88k mi

Instagram: @Titan_E34
Snapchat: Titan_E34
  #3  
Old 01-11-2013, 06:26 AM
E34_Obsession E34_Obsession is offline
"The sound of the M50"
Location: Illinois USA
 
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The car will start, but dies right away. It gets fuel, gets spark, and has compression. I'm not sure what the issue is now.
__________________
1991 BMW E34 525iA

1999 Toyota Tacoma Prerunner Xtracab 2.7L

2008 Toyota Tacoma Prerunner DCSB TRD Sport

1995 Toyota Tacoma 2WD DX V6 - SOLD

1992 Toyota Pickup - SOLD

2003 Subaru Forester 2.5X - TOTALLED

2004 Subaru Forester 2.5XT - SOLD

2005 Subaru WRX Sedan - SOLD
  #4  
Old 01-11-2013, 06:45 AM
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Monsignor Monsignor is offline
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Location: Pineapple Under the Sea
 
Join Date: Oct 2009
Posts: 3,199
Mein Auto: M50 Big Body
So you never found a fix from november?
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1995 525iA 250k mi
2006 325i/6 57k mi
2003 350Z 88k mi

Instagram: @Titan_E34
Snapchat: Titan_E34
  #5  
Old 01-11-2013, 06:49 AM
E34_Obsession E34_Obsession is offline
"The sound of the M50"
Location: Illinois USA
 
Join Date: Nov 2012
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Nope! Same thing! My plan is to get the car painted and restored by march, but this issue is pushing that date further and further.
__________________
1991 BMW E34 525iA

1999 Toyota Tacoma Prerunner Xtracab 2.7L

2008 Toyota Tacoma Prerunner DCSB TRD Sport

1995 Toyota Tacoma 2WD DX V6 - SOLD

1992 Toyota Pickup - SOLD

2003 Subaru Forester 2.5X - TOTALLED

2004 Subaru Forester 2.5XT - SOLD

2005 Subaru WRX Sedan - SOLD
  #6  
Old 01-11-2013, 06:57 AM
Monsignor's Avatar
Monsignor Monsignor is offline
BMW CCA Memeber #445389
Location: Pineapple Under the Sea
 
Join Date: Oct 2009
Posts: 3,199
Mein Auto: M50 Big Body
making it run is a little more important than what color it is IMHO.

you never took that video, so lets try that. dont run it on carb cleaner, that solves nothing.

Did you check all vacuum lines? maybe a hose rotted away or popped off
__________________


1995 525iA 250k mi
2006 325i/6 57k mi
2003 350Z 88k mi

Instagram: @Titan_E34
Snapchat: Titan_E34
  #7  
Old 01-11-2013, 07:14 AM
E34_Obsession E34_Obsession is offline
"The sound of the M50"
Location: Illinois USA
 
Join Date: Nov 2012
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Mein Auto: Look in my Signature :P
Will fire on starter fluid or carb cleaner but thats because it does fire off of the fuel its getting a well. It just wont run or continue to run. I will take a video and put on youtube today.
__________________
1991 BMW E34 525iA

1999 Toyota Tacoma Prerunner Xtracab 2.7L

2008 Toyota Tacoma Prerunner DCSB TRD Sport

1995 Toyota Tacoma 2WD DX V6 - SOLD

1992 Toyota Pickup - SOLD

2003 Subaru Forester 2.5X - TOTALLED

2004 Subaru Forester 2.5XT - SOLD

2005 Subaru WRX Sedan - SOLD
  #8  
Old 01-11-2013, 07:17 AM
E34_Obsession E34_Obsession is offline
"The sound of the M50"
Location: Illinois USA
 
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Mein Auto: Look in my Signature :P
Whole top end of motor rebuilt in summer 2012 all fuel and vaccuum lines replaced. No vaccuum leak detected when I checked.
__________________
1991 BMW E34 525iA

1999 Toyota Tacoma Prerunner Xtracab 2.7L

2008 Toyota Tacoma Prerunner DCSB TRD Sport

1995 Toyota Tacoma 2WD DX V6 - SOLD

1992 Toyota Pickup - SOLD

2003 Subaru Forester 2.5X - TOTALLED

2004 Subaru Forester 2.5XT - SOLD

2005 Subaru WRX Sedan - SOLD
  #9  
Old 01-11-2013, 07:19 AM
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Monsignor Monsignor is offline
BMW CCA Memeber #445389
Location: Pineapple Under the Sea
 
Join Date: Oct 2009
Posts: 3,199
Mein Auto: M50 Big Body
I would check ICV real good and all lines to and from it. you have a gigantic vacuum leak somewhere.

Also, you're supposed to just run it on the carb cleaner without fuel to see if the fuel is the issue
__________________


1995 525iA 250k mi
2006 325i/6 57k mi
2003 350Z 88k mi

Instagram: @Titan_E34
Snapchat: Titan_E34
  #10  
Old 01-11-2013, 07:28 AM
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supertech777 supertech777 is offline
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Location: springfield , missouri
 
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Mein Auto: 1995 525i
Quote:
Originally Posted by Monsignor View Post
I would check ICV real good and all lines to and from it. you have a gigantic vacuum leak somewhere.

Also, you're supposed to just run it on the carb cleaner without fuel to see if the fuel is the issue
+1 have you thought of the possibility of water in the fuel , cause that would make it backfire to . Or one of the coils wiring has been switched ... Just going with the thought that you said top end was rebuilt last summer .. what do you think Joe ?

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  #11  
Old 01-11-2013, 07:28 AM
E34_Obsession E34_Obsession is offline
"The sound of the M50"
Location: Illinois USA
 
Join Date: Nov 2012
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I have tried that and it does the same thing on carb cleaner. ICV is good. Resistance on the ICV is within the threshold via the Bentley Manual specs. Hoses to and fro it are in great shape and clamped properly. Car was running on the top end rebuild for about 5 months before I had this issue. The only thing I could think of at this point is a DME failure but thats not possible because the engine throws spark and sprays fuel.
__________________
1991 BMW E34 525iA

1999 Toyota Tacoma Prerunner Xtracab 2.7L

2008 Toyota Tacoma Prerunner DCSB TRD Sport

1995 Toyota Tacoma 2WD DX V6 - SOLD

1992 Toyota Pickup - SOLD

2003 Subaru Forester 2.5X - TOTALLED

2004 Subaru Forester 2.5XT - SOLD

2005 Subaru WRX Sedan - SOLD
  #12  
Old 01-11-2013, 07:34 AM
Monsignor's Avatar
Monsignor Monsignor is offline
BMW CCA Memeber #445389
Location: Pineapple Under the Sea
 
Join Date: Oct 2009
Posts: 3,199
Mein Auto: M50 Big Body
Noel, it'd be a magic trick to mix up the coil pack connectors on an M50 without realizing something is wrong haha. This top end rebuild is a bit suspicious...

E34 Obsession, when you did this top end rebuild, do you remove the cams or timing chain at all?
__________________


1995 525iA 250k mi
2006 325i/6 57k mi
2003 350Z 88k mi

Instagram: @Titan_E34
Snapchat: Titan_E34
  #13  
Old 01-11-2013, 07:36 AM
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supertech777 supertech777 is offline
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Location: springfield , missouri
 
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Mein Auto: 1995 525i
That's true with your theory on the spark and dme , but who knows what weird ghosts these cars produce and sometimes is a direct correlation to the dme !

Sent from my Desire HD using Bimmer App
  #14  
Old 01-11-2013, 07:37 AM
Monsignor's Avatar
Monsignor Monsignor is offline
BMW CCA Memeber #445389
Location: Pineapple Under the Sea
 
Join Date: Oct 2009
Posts: 3,199
Mein Auto: M50 Big Body
Quote:
Originally Posted by supertech777 View Post
That's true with your theory on the spark and dme , but who knows what weird ghosts these cars produce and sometimes is a direct correlation to the dme !

Sent from my Desire HD using Bimmer App
Gotta love those little boxes of nightmare... So happy mine is a factory 413 red label
__________________


1995 525iA 250k mi
2006 325i/6 57k mi
2003 350Z 88k mi

Instagram: @Titan_E34
Snapchat: Titan_E34
  #15  
Old 01-11-2013, 07:38 AM
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supertech777 supertech777 is offline
Officially Welcomed to the 'Fest
Location: springfield , missouri
 
Join Date: May 2008
Posts: 752
Mein Auto: 1995 525i
Quote:
Originally Posted by Monsignor View Post
Noel, it'd be a magic trick to mix up the coil pack connectors on an M50 without realizing something is wrong haha. This top end rebuild is a bit suspicious...

E34 Obsession, when you did this top end rebuild, do you remove the cams or timing chain at all?
LOL but as you know Joe weirder things have happened in diy LOL wish we could help some of these people via Skype or facetime

Sent from my Desire HD using Bimmer App
  #16  
Old 01-11-2013, 07:39 AM
E34_Obsession E34_Obsession is offline
"The sound of the M50"
Location: Illinois USA
 
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I had a friend of mine rebuild the top end and install a new head gasket. He is a BMW Mechanic.
__________________
1991 BMW E34 525iA

1999 Toyota Tacoma Prerunner Xtracab 2.7L

2008 Toyota Tacoma Prerunner DCSB TRD Sport

1995 Toyota Tacoma 2WD DX V6 - SOLD

1992 Toyota Pickup - SOLD

2003 Subaru Forester 2.5X - TOTALLED

2004 Subaru Forester 2.5XT - SOLD

2005 Subaru WRX Sedan - SOLD
  #17  
Old 01-11-2013, 07:42 AM
Monsignor's Avatar
Monsignor Monsignor is offline
BMW CCA Memeber #445389
Location: Pineapple Under the Sea
 
Join Date: Oct 2009
Posts: 3,199
Mein Auto: M50 Big Body
answer this as honestly as you can because i take everything with a grain of salt here (nobody wants to seem like a noob or an idiot and they lie about the thing that will fix the car, to their own demise)

Did the car ever right after that head gasket job by your buddy?

Also, please define "BMW Mechanic." Certified? Works at a dealership? Or is he a lot jockey with a wrench...
__________________


1995 525iA 250k mi
2006 325i/6 57k mi
2003 350Z 88k mi

Instagram: @Titan_E34
Snapchat: Titan_E34

Last edited by Monsignor; 01-11-2013 at 07:53 AM.
  #18  
Old 01-11-2013, 08:04 AM
E34_Obsession E34_Obsession is offline
"The sound of the M50"
Location: Illinois USA
 
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Works at Laurel BMW of Westmont. Car ran beautifully after wards. Put a few hundred miles on it sinse the rebuild. This problem to my knowledge seem electrical, but im not sure.
__________________
1991 BMW E34 525iA

1999 Toyota Tacoma Prerunner Xtracab 2.7L

2008 Toyota Tacoma Prerunner DCSB TRD Sport

1995 Toyota Tacoma 2WD DX V6 - SOLD

1992 Toyota Pickup - SOLD

2003 Subaru Forester 2.5X - TOTALLED

2004 Subaru Forester 2.5XT - SOLD

2005 Subaru WRX Sedan - SOLD
  #19  
Old 01-11-2013, 08:06 AM
Monsignor's Avatar
Monsignor Monsignor is offline
BMW CCA Memeber #445389
Location: Pineapple Under the Sea
 
Join Date: Oct 2009
Posts: 3,199
Mein Auto: M50 Big Body
My theory is that it wasnt timed properly or the cam sprokets werent torqued right which made it fall out of time over time.
__________________


1995 525iA 250k mi
2006 325i/6 57k mi
2003 350Z 88k mi

Instagram: @Titan_E34
Snapchat: Titan_E34
  #20  
Old 01-11-2013, 08:08 AM
E34_Obsession E34_Obsession is offline
"The sound of the M50"
Location: Illinois USA
 
Join Date: Nov 2012
Posts: 74
Send a message via ICQ to E34_Obsession Send a message via Skype™ to E34_Obsession
Mein Auto: Look in my Signature :P
I have checked the timing. Set to TDC and it looks to be correct. Looks same as
__________________
1991 BMW E34 525iA

1999 Toyota Tacoma Prerunner Xtracab 2.7L

2008 Toyota Tacoma Prerunner DCSB TRD Sport

1995 Toyota Tacoma 2WD DX V6 - SOLD

1992 Toyota Pickup - SOLD

2003 Subaru Forester 2.5X - TOTALLED

2004 Subaru Forester 2.5XT - SOLD

2005 Subaru WRX Sedan - SOLD
  #21  
Old 01-11-2013, 08:08 AM
E34_Obsession E34_Obsession is offline
"The sound of the M50"
Location: Illinois USA
 
Join Date: Nov 2012
Posts: 74
Send a message via ICQ to E34_Obsession Send a message via Skype™ to E34_Obsession
Mein Auto: Look in my Signature :P
the picture in the manual
__________________
1991 BMW E34 525iA

1999 Toyota Tacoma Prerunner Xtracab 2.7L

2008 Toyota Tacoma Prerunner DCSB TRD Sport

1995 Toyota Tacoma 2WD DX V6 - SOLD

1992 Toyota Pickup - SOLD

2003 Subaru Forester 2.5X - TOTALLED

2004 Subaru Forester 2.5XT - SOLD

2005 Subaru WRX Sedan - SOLD
  #22  
Old 01-11-2013, 08:12 AM
Monsignor's Avatar
Monsignor Monsignor is offline
BMW CCA Memeber #445389
Location: Pineapple Under the Sea
 
Join Date: Oct 2009
Posts: 3,199
Mein Auto: M50 Big Body
I feel like every suggestion we make you say "it looks fine. it works. i checked it."

TDC lines need to match up. Look at the back of the cams near the fire wall. They should be square, yes? With the Motor at TDC (the line on the vibration dampener matched up with the one on the block) there should be dots on the top of the squares at the rear of the cams
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1995 525iA 250k mi
2006 325i/6 57k mi
2003 350Z 88k mi

Instagram: @Titan_E34
Snapchat: Titan_E34
  #23  
Old 01-11-2013, 08:21 AM
E34_Obsession E34_Obsession is offline
"The sound of the M50"
Location: Illinois USA
 
Join Date: Nov 2012
Posts: 74
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Mein Auto: Look in my Signature :P
I will check today and let you guys know. I will also recheck the ICV as well as drain the tank and put some new premium in. I will then take a video and post on internet for everyone to see.
__________________
1991 BMW E34 525iA

1999 Toyota Tacoma Prerunner Xtracab 2.7L

2008 Toyota Tacoma Prerunner DCSB TRD Sport

1995 Toyota Tacoma 2WD DX V6 - SOLD

1992 Toyota Pickup - SOLD

2003 Subaru Forester 2.5X - TOTALLED

2004 Subaru Forester 2.5XT - SOLD

2005 Subaru WRX Sedan - SOLD
  #24  
Old 01-11-2013, 08:28 AM
Monsignor's Avatar
Monsignor Monsignor is offline
BMW CCA Memeber #445389
Location: Pineapple Under the Sea
 
Join Date: Oct 2009
Posts: 3,199
Mein Auto: M50 Big Body
pick up another DME. they go for the price of a full tank of premium. Check which one you have. It'll be a color and number. I have a 413 Red Label.

__________________


1995 525iA 250k mi
2006 325i/6 57k mi
2003 350Z 88k mi

Instagram: @Titan_E34
Snapchat: Titan_E34
  #25  
Old 01-11-2013, 08:46 AM
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BMR_LVR BMR_LVR is offline
Humble E34 lover
Location: Asheboro, NC
 
Join Date: Dec 2008
Posts: 5,264
Mein Auto: 1992 525i
He has non-vanos. He should have brown label 402 DME.
__________________
Most problems are usually something simple !

Quote:
Originally Posted by noego View Post
It's Deja Poo - as in, I've heard this **** before.
Steve

Calypso Red 1992 525i with 200K miles

1991 735i - Sold
1992 525i - Sold
1995 325is - Sold
2000 528i - Sold

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