Repairing a 'fried' N54 MSD80 DME

andydna15 · 02-27-2015, 12:54 PM

Quote:

Originally Posted by RyanS13

Bumping for any ideas on this? New mosfets should be getting to my house today.

I just replaced mine yesterday which fixed the issue. What codes you getting?

RyanF82 · 02-27-2015, 12:56 PM

Quote:

Originally Posted by andydna15

I just replaced mine yesterday which fixed the issue. What codes you getting?

30BB and a couple other ones as well related to injectors 4,5, & 6. Pretty much the same codes everyone else gets when they need to replace the mosfets, except the only difference is when I test them with the multimeter I'm not getting any beeps on them.

andydna15 · 02-27-2015, 01:00 PM

Quote:

Originally Posted by RyanS13

30BB and a couple other ones as well related to injectors 4,5, & 6. Pretty much the same codes everyone else gets when they need to replace the mosfets, except the only difference is when I test them with the multimeter I'm not getting any beeps on them.

I would swap them out anyway. I was only getting 1 injector code but three of the MOSFETs were bad. Not sure about not beeping if there defective.

RyanF82 · 02-27-2015, 01:02 PM

Quote:

Originally Posted by andydna15

I would swap them out anyway. I was only getting 1 injector code but three of the MOSFETs were bad. Not sure about not beeping if there defective.

Did you do the swap yourself?

andydna15 · 02-27-2015, 01:10 PM

Quote:

Originally Posted by RyanS13

Did you do the swap yourself?

I had a local guy do it for me took him 15min.Went to 3 other places before him and they all said they don't touch car parts

RyanF82 · 02-27-2015, 01:12 PM

Quote:

Originally Posted by andydna15

I had a local guy do it for me took him 15min.

Where at? I noticed your location says OC, would that be OC as in Orange County, California? I'm looking for a place to do mine as well.

andydna15 · 02-27-2015, 01:14 PM

Quote:

Originally Posted by RyanS13

Where at? I noticed your location says OC, would that be OC as in Orange County, California? I'm looking for a place to do mine as well.

Yeah I'm located in Santa Ana and so is the shop. Let me find the address.

RyanF82 · 02-27-2015, 01:20 PM

Quote:

Originally Posted by andydna15

Yeah I'm located in Santa Ana and so is the shop. Let me find the address.

I pm'd you.

RyanF82 · 02-27-2015, 07:41 PM

I just got all 6 replaced, and the guy who replaced them said all 6 were fine. I brought the DME home and plugged it in, still the exact same problem. Any one have any other ideas?

andydna15 · 02-27-2015, 07:55 PM

Quote:

Originally Posted by RyanS13

I just got all 6 replaced, and the guy who replaced them said all 6 were fine. I brought the DME home and plugged it in, still the exact same problem. Any one have any other ideas?

Did you get the same codes? When I swapped mine it started out rough but figured out it was a bad coil that had also gone out.

RyanF82 · 02-27-2015, 08:15 PM

Quote:

Originally Posted by andydna15

Did you get the same codes? When I swapped mine it started out rough but figured out it was a bad coil that had also gone out.

Yea, same codes, however I didn't clear them before. All I'm getting is the 30BB code and one other one that I looked up and it's related to the battery or something. I had the doors open for a long time yesterday so the battery is probably a little low. I'm not getting any misfire codes though, and it's definitely much worse than just a misfire. It barely runs when I turn it on.

RyanF82 · 02-27-2015, 08:31 PM

Just tested the relay that's in the DME box and that is good as well, however my dad said once I started it there was no clicking coming from it at all, so I'm not sure if it's getting power sent to it. The weird thing is when this all started, the car started just fine. Then after about 5 seconds this started. Is there a fuse or something that can blow in line with that relay?

mj6234 · 03-05-2015, 08:29 AM

I am back up and running with IRF644SPBF from Mouser.

Like the OP, the injector 5 MOSFET was fried. I used a local TV repair shop to get it fixed. I am in Kansas City if anyone wants to know the repair location.

Probably this is the best thread I have ever read in my 15 years of reading boards.

LightningTuned · 03-16-2015, 05:04 PM

It happened. Installed JB4 G5 ISO two days ago, car drove just fine for two days. On the third day car was just fine, I get almost to work and im going like 20mph in 2nd gear, I go to accelerate and car falls on its face. Pull into parking lot, Misfires on 1, 2 and 3, along with 30BA. Clear codes, restart car, still runs like shit. 30BA. Guess I fried my bank 1 mosfets. Now the question is do I want to repair this myself or bite the bullet and send it off for 500 bucks. Ive never soldered on circuit boards, but i have lots of experience soldering connectors, cannon plugs, micro switches. Ugh.

Tim603 · 03-16-2015, 05:20 PM

Quote:

Originally Posted by LightningTuned

It happened. Installed JB4 G5 ISO two days ago, car drove just fine for two days. On the third day car was just fine, I get almost to work and im going like 20mph in 2nd gear, I go to accelerate and car falls on its face. Pull into parking lot, Misfires on 1, 2 and 3, along with 30BA. Clear codes, restart car, still runs like shit. 30BA. Guess I fried my bank 1 mosfets. Now the question is do I want to repair this myself or bite the bullet and send it off for 500 bucks. Ive never soldered on circuit boards, but i have lots of experience soldering connectors, cannon plugs, micro switches. Ugh.

How many miles does your car have? Any other mods besides JB4 G5?

LightningTuned · 03-16-2015, 06:00 PM

64.5k No other mods, Spark plugs were just chanced 1.5k ago. Picked up the car with 63k, Drove it fine for 1.5k miles. Shits crazy.

newbmwguy99 · 03-16-2015, 06:04 PM

What year is the car? For that matter what year and model are the cars that have been effected? Build dates?

LightningTuned · 03-16-2015, 06:07 PM

2007 e90 335i 6 Speed Manual Build Date 10/06

Tim603 · 03-16-2015, 06:32 PM

Damn that shit is crazy. Makes me want to get 6 injectors, plugs and coils and 6 IRF644SPBF before I even think of tuning my car lol I dont have a second car so if my DME fries im fucked. I need to be able to fix that shit in a night :/

LightningTuned · 03-16-2015, 06:56 PM

Been doing a lot of reading on hot air soldering. I feel confident enough to attempt this myself but I have few quick questions. What temp for removing the bad chips? What temp to install new chips? I plan on using 63/37 paste, Will this work best?

andydna15 · 03-16-2015, 07:01 PM

Quote:

Originally Posted by LightningTuned

It happened. Installed JB4 G5 ISO two days ago, car drove just fine for two days. On the third day car was just fine, I get almost to work and im going like 20mph in 2nd gear, I go to accelerate and car falls on its face. Pull into parking lot, Misfires on 1, 2 and 3, along with 30BA. Clear codes, restart car, still runs like shit. 30BA. Guess I fried my bank 1 mosfets. Now the question is do I want to repair this myself or bite the bullet and send it off for 500 bucks. Ive never soldered on circuit boards, but i have lots of experience soldering connectors, cannon plugs, micro switches. Ugh.

Order the MOSFETs and go to a Tv repair shop and have them swap them out. This repair isn't worth $500. if your willing to pay that much send it to me

LightningTuned · 03-16-2015, 07:08 PM

Had my JB4 App logging while it happened.

https://drive.google.com/file/d/0Bw0...ew?usp=sharing

02-27-2015, 07:41 PM	#185
RyanF82 Private First Class 16 Rep 100 Posts Drives: F82 AW/SO 6MT Join Date: Aug 2012 Location: Long Beach iTrader: (3)	I just got all 6 replaced, and the guy who replaced them said all 6 were fine. I brought the DME home and plugged it in, still the exact same problem. Any one have any other ideas?
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02-27-2015, 08:31 PM	#188
RyanF82 Private First Class 16 Rep 100 Posts Drives: F82 AW/SO 6MT Join Date: Aug 2012 Location: Long Beach iTrader: (3)	Just tested the relay that's in the DME box and that is good as well, however my dad said once I started it there was no clicking coming from it at all, so I'm not sure if it's getting power sent to it. The weird thing is when this all started, the car started just fine. Then after about 5 seconds this started. Is there a fuse or something that can blow in line with that relay?
	Appreciate 0 Quote

03-05-2015, 08:29 AM	#189
mj6234 Private First Class 31 Rep 105 Posts Drives: E92 335i Join Date: Nov 2011 Location: US iTrader: (0)	I am back up and running with IRF644SPBF from Mouser. Like the OP, the injector 5 MOSFET was fried. I used a local TV repair shop to get it fixed. I am in Kansas City if anyone wants to know the repair location. Probably this is the best thread I have ever read in my 15 years of reading boards.
	Appreciate 0 Quote

03-16-2015, 05:04 PM	#190
LightningTuned Private 13 Rep 68 Posts Drives: 07 335i E90 Join Date: Jan 2015 Location: Va Beach iTrader: (0)	It happened. Installed JB4 G5 ISO two days ago, car drove just fine for two days. On the third day car was just fine, I get almost to work and im going like 20mph in 2nd gear, I go to accelerate and car falls on its face. Pull into parking lot, Misfires on 1, 2 and 3, along with 30BA. Clear codes, restart car, still runs like shit. 30BA. Guess I fried my bank 1 mosfets. Now the question is do I want to repair this myself or bite the bullet and send it off for 500 bucks. Ive never soldered on circuit boards, but i have lots of experience soldering connectors, cannon plugs, micro switches. Ugh.
	Appreciate 0 Quote

03-16-2015, 06:00 PM	#192
LightningTuned Private 13 Rep 68 Posts Drives: 07 335i E90 Join Date: Jan 2015 Location: Va Beach iTrader: (0)	64.5k No other mods, Spark plugs were just chanced 1.5k ago. Picked up the car with 63k, Drove it fine for 1.5k miles. Shits crazy. Last edited by LightningTuned; 03-16-2015 at 06:07 PM..
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03-16-2015, 06:04 PM	#193
newbmwguy99 Private First Class 9 Rep 122 Posts Drives: 2008 335i Join Date: Jan 2015 Location: Gambrills MD iTrader: (3)	What year is the car? For that matter what year and model are the cars that have been effected? Build dates?
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03-16-2015, 06:07 PM	#194
LightningTuned Private 13 Rep 68 Posts Drives: 07 335i E90 Join Date: Jan 2015 Location: Va Beach iTrader: (0)	2007 e90 335i 6 Speed Manual Build Date 10/06
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03-16-2015, 06:32 PM	#195
Tim603 Colonel 483 Rep 2,283 Posts Drives: 2007 335i E90 Join Date: Feb 2012 Location: North Canton, OH iTrader: (8) Garage List 2007 335i [0.00]	Damn that shit is crazy. Makes me want to get 6 injectors, plugs and coils and 6 IRF644SPBF before I even think of tuning my car lol I dont have a second car so if my DME fries im fucked. I need to be able to fix that shit in a night :/ __________________ Build Thread
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03-16-2015, 06:56 PM	#196
LightningTuned Private 13 Rep 68 Posts Drives: 07 335i E90 Join Date: Jan 2015 Location: Va Beach iTrader: (0)	Been doing a lot of reading on hot air soldering. I feel confident enough to attempt this myself but I have few quick questions. What temp for removing the bad chips? What temp to install new chips? I plan on using 63/37 paste, Will this work best?
	Appreciate 0 Quote

03-16-2015, 07:08 PM	#198
LightningTuned Private 13 Rep 68 Posts Drives: 07 335i E90 Join Date: Jan 2015 Location: Va Beach iTrader: (0)	Had my JB4 App logging while it happened. https://drive.google.com/file/d/0Bw0...ew?usp=sharing
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