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E34 (1989 - 1995)

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  #26  
Old 10-11-2011, 05:53 PM
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Eh, pictures need not be necessary. I am not anywhere near sure on this. I suppose the DME and ecu are one in the same.

Either way, I would definitely replace both harness and ecu is either fail to fix the problem. If neither fix it then you may have an expensive paper weight :/
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  #27  
Old 10-11-2011, 08:11 PM
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I was able to get the car off the street in a spot that I have plenty of time to work on her so that is a big load off... Hurray!!! :o)))

Here is a pic of the ECU. It is bolted in to the left of the DME and fuel pump relays (In that same compartment). If memory serves me correctly, I think I have heard it referd to as the DME Control unit ??? and something else too.
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  #28  
Old 10-11-2011, 08:21 PM
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BMR_LVR BMR_LVR is offline
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Quote:
Originally Posted by CarDriver View Post
I was able to get the car off the street in a spot that I have plenty of time to work on her so that is a big load off... Hurray!!! :o)))

Here is a pic of the ECU. It is bolted in to the left of the DME and fuel pump relays (In that same compartment).
Hey CD. That is the DME (I researched the part # before I splatterd an egg all over my face). Can you take a picture of what you are thinking is the DME that the above unit was beside of?

Steve

PS: It sucks, but DME, ECU, ECM, and ignition control module are some of the other names it goes by, including others that I can't think of right now.
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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


Last edited by BMR_LVR; 10-11-2011 at 08:23 PM.
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  #29  
Old 10-11-2011, 08:34 PM
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This
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2014 F-150 0k mi

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  #30  
Old 10-11-2011, 08:41 PM
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Quote:
Originally Posted by 95 E34 View Post
This
Don't quote me on this, but I'm pretty sure that is just a cover for the wiring harness. I don't think it is a particular component. I will take a look at realoem.com to investigate further.

Steve
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Most problems are usually something simple !

Quote:
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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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  #31  
Old 10-11-2011, 08:52 PM
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Quote:
Originally Posted by 95 E34 View Post
This
I believe this is what you show in the picture. #1 and #2. It is just a covering over the wiring harness.

http://bmwfans.info/parts/catalog/E3...rness_fixings/

Steve
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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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  #32  
Old 10-11-2011, 08:59 PM
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OK, What was confusing is that there is a DME main relay (white in color) that is parked right next to the fuel pump relay/ That is what I was referring to when I was saying DME. When I was talking about ECU, I was referring to the MOTRONIC thingy I pictured above. We were all right.

Incidentally, The nuts that hold down the ECU were loose. depending on how long that thing was bouncing around in there and after the accident I had on that side, the board could easily have cracked or have damaged solder points on it just like the boards in the LKM when they go bad. Hmmm...
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  #33  
Old 10-11-2011, 09:04 PM
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Originally Posted by CarDriver View Post
OK, What was confusing is that there is a DME main relay (white in color) that is parked right next to the fuel pump relay/ That is what I was referring to when I was saying DME. When I was talking about ECU, I was referring to the MOTRONIC thingy I pictured above. We were all right.

Incidentally, The nuts that hold down the ECU were loose. depending on how long that thing was bouncing around in there and after the accident I had on that side, the board could easily have cracked or have damaged solder points on it just like the boards in the LKM when they go bad. Hmmm...
Yep. I agree that some solder points may have cracked. I would still recommend getting that main relay (the white small relay) and try that first (you may already have done this .... I'm getting a little confused on what exactly you've done. Comes with my 51 birthdays ) The relay only costs ~$25 at the dealer. Even if it turns out that the relay was not the problem, you have a spare Even the Bentley manual recommends keeping a spare main relay.

Keep us posted.

Steve
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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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  #34  
Old 10-11-2011, 09:22 PM
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I usually start replacing old parts and just fix the problems hit or miss. coils,plugs. coil to plug boots. wires. Relays, ..A lot of articles point to the crank shaft position sensor. Its something simple i think tighten all engine bay grounds. make the usual rounds charged batteries, identify ignition switch fuse,test. And heres a interesting link from the e30 forum that may help? http://www.bimmerfest.com/forums/sho...d.php?t=363596
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  #35  
Old 10-11-2011, 09:45 PM
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LOL... your first few lines sounded like one of them "Shade tree mechanics" LOL... Your car actually just has a blown 7.5 amp fuse under the rear seat and the mechanic just started throwing parts at it. You end up paying for 4 window regulators, Window switches, central locking unit, windshield wiper motor, labor on the sun roof and 10 hours of automotive electrician time. Oh, and paying for a 7.5 amp fuse. Sorry Man, It just made me chuckle...

The link is good, thanks. All help I am getting is a blessing.


As for my sedan...

I tested the fuel pump and actual fuel delivery, OK

I tested the coil, tested OK (Also Tested with brand new BOSCH coil, still no Start)

I tested for spark, NO Spark

I tested the DME Main relay, by replacing it. Still no spark.

I tested the CPS, OK

The plugs, wires, distrib cap and rotor have less than 300 miles on them.

Oh, I also took out the Fuel Pump Relay and the DME main relay out of the sedan and put them into my touring and the touring started right up.

So next is the ECU and if that is a no go then I will replace the CPS even though it tested OK...
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  #36  
Old 10-11-2011, 10:02 PM
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"LOL... your first few lines sounded like one of them "Shade tree mechanics LOL..." Your car actually just has a blown 7.5 amp fuse under the rear seat and the mechanic just started throwing parts at it. " " Why yes thank you for the complement, never been called a mechanic before thanks. Reason is i did not know the age or condition of the engines of these cars sitting for years with blown head gaskets. Full tune ups and overhauls. Its those too cheap to replace things end up having problems later . Good luck

Last edited by luckydog; 10-17-2011 at 02:37 PM.
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  #37  
Old 10-11-2011, 10:36 PM
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Originally Posted by luckydog View Post
"LOL... your first few lines sounded like one of them "Shade tree mechanics" LOL... Your car actually just has a blown 7.5 amp fuse under the rear seat and the mechanic just started throwing parts at it. " Reason is i did not know the age or condition of the engines of these cars sitting for years with blown head gaskets. Full tune ups and overhauls. Its those too cheap to replace things end up having problems later . Good luck
Friend, no insult, it was a joke... reminded me of my brother and one particular visit to a mechanic in NY... And your suggestions were great and a blessing as I stated in the reply that you seem to have objected to. once again, no insult

And cheap has nothing to do with it. I am a full time student with tiny, tiny income . I can only troubleshoot, find the exact problem and fix that.

Believe you me (LOL...) Once this school crap is over (five weeks or so) She will get a proper overhaul on many things weather they are actually broke or not And I agree with what you were saying from the perspective of upkeep but not for troubleshooting an issue. Most things under there are twenty years old and need to be changed just as a PM even if they may still be functional. But within reason.

Have a few on me...
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  #38  
Old 10-13-2011, 09:49 AM
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Decided to put my efforts into the Touring :o)) I found a guy parked across the street from my apt this morning with a 90 sedan that is in dire need of help... LOL... he needs front bumper, two left doors, fender, entire front grill assembly and stock wheels. I will be able to recoup the cash I had to put into her since the accident and then some... Outstanding.

And yes, It was the ECU that was causing the problem. New project, E34 Touring... I am at Peace :o))
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  #39  
Old 10-13-2011, 10:38 AM
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Glad everything worked out for you

I re-read the entire thread. Your gut instincts were indeed correct. I went through the same process with my E36 meaning that I ruled everything else out which lead me to the DME (ECU if you prefer).

I hope I was able to help you at least a little.

Good luck with the touring.

Steve
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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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  #40  
Old 10-13-2011, 12:20 PM
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You helped a great deal. It is good to have people going through it with you. But you know I will now have to make the Touring Awesome...

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  #41  
Old 10-17-2011, 05:55 AM
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So the guy shows up to look at the parts. Instead of discussing with me a deal on payment and pickup, he tells me how my car is done for and anytime a bmw like this has this type of problem it can never be fixed and his friends are all bimmer mechanics and they had a problem like that and never could fix and bla, bla, bla...bs, bs, bs... Mind you I have already found out what was wrong with the car LOL...

He offers me a few hundred for the whole car. I told him that I am selling him some of the parts, but the rest of the parts I need will go to the touring. Then he tells me that parts from these cars are not interchangeable and how BMW does that so all parts must be gotten from them... Uhhh, question... If that be the case, WTF are you doing looking to buy parts from it to put on your car??

This guy either has no previously mentioned friends or the ones he has are crap mechanics, he can only drive his car during the day and has done so for months because he has no working headlights, none... we walk over to his E34 and I have him pop the hood, take a two minuet look at the wiring and I tell him to replace the LKM. He says no that's not it, my friends went over every thing, there is a short somewhere in the harness for the light, bla, bla, bla...

I grab an LKM from my car, stick it in his car... Lights on... Its a miracle LOL... "Let me buy that from you" he says... "No Need" I said, there is nothing wrong with yours remember... And do not worry about paying for my parts, I am keeping my car, have a nice day...
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  #42  
Old 10-17-2011, 06:44 AM
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Great story

Steve
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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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  #43  
Old 10-17-2011, 08:04 AM
robertobaggio20 robertobaggio20 is offline
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Quote:
Originally Posted by CarDriver View Post

I grab an LKM from my car, stick it in his car... Lights on... Its a miracle LOL... "Let me buy that from you" he says... "No Need" I said, there is nothing wrong with yours remember... And do not worry about paying for my parts, I am keeping my car, have a nice day...

You are just like our E34s....not only do you get the job done....but you do it with such immaculate style.
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  #44  
Old 10-17-2011, 01:18 PM
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And you said you doubt if she is a witch. Lol... she has a spell on me for sure...

Sent from my MB508 using Bimmer
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  #45  
Old 10-17-2011, 02:27 PM
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Quote:
Originally Posted by CarDriver View Post
I was able to get the car off the street in a spot that I have plenty of time to work on her so that is a big load off... Hurray!!! :o)))

Here is a pic of the ECU. It is bolted in to the left of the DME and fuel pump relays (In that same compartment). If memory serves me correctly, I think I have heard it referd to as the DME Control unit ??? and something else too.
Yes you are correct according to this short alphabetical list of acronyms"ECU = Electronic Control Unit (see DME)
I thought it was Engine Control Unit. http://www.bimmerfest.com/forums/sho...d.php?t=454814
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  #46  
Old 10-17-2011, 02:43 PM
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Friend, no insult, it was a joke... reminded me of my brother and one particular visit to a mechanic in NY... And your suggestions were great and a blessing as I stated in the reply that you seem to have objected to. once again, no insult

And cheap has nothing to do with it. I am a full time student with tiny, tiny income . I can only troubleshoot, find the exact problem and fix that.

Believe you me (LOL...) Once this school crap is over (five weeks or so) She will get a proper overhaul on many things weather they are actually broke or not And I agree with what you were saying from the perspective of upkeep but not for troubleshooting an issue. Most things under there are twenty years old and need to be changed just as a PM even if they may still be functional. But within reason.

Have a few on me...
Thanks for the complement .Thats exactly what I am a Shade tree Mech on the weekends and a Electrician during the week,a few other things too. glad you got yours going again .LD
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  #47  
Old 10-17-2011, 06:05 PM
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Thanks for the complement .Thats exactly what I am a Shade tree Mech on the weekends and a Electrician during the week,a few other things too. glad you got yours going again .LD
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  #48  
Old 10-17-2011, 11:16 PM
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Should have seen this earlier, I have tons of spare parts including your ECU/relays/etc locally you could have tried out before.
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  #49  
Old 10-18-2011, 03:46 PM
TDanza525i TDanza525i is offline
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just an idea i had the same situation, i also have a 90 525i m20
my crank sensor ohmed out fine like yours, but check the condition of the wire cause it runs very close to the wpump pulley and the only thing holding it back is a plastic cover which tend to break over many years and once it breaks and the pulley start munching on the wire leaving some wires inside exposed and get grounded out by the timing cover. So you get fuel but the spark will be weak or you will have no spark at all.

Last edited by TDanza525i; 10-20-2011 at 04:43 PM.
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  #50  
Old 10-20-2011, 01:34 AM
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DME means Digital motor electronics. I guess its just another fancy word like idrive etc. Often the throttle position sensor is faulty also. Best thing to do on these cars is pay for a scan if you can do so. They are very intellegent cars, and that can tell you exactly whats wrong with it. If there is no communication, then the ecu/dme is the fault.
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