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Open in new windowArchive through October 03, 2011Mike Beck25 
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James Buchan
Goo Roo
Vic
V8

Posts: 1190
Reg: 10-2008

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Tuesday, October 04, 2011 - 09:09 pm, by:  James Buchan (Jrbuch) Quote hilighted text Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)

I've not changed my ecu's caps or had them inspected. That said my car goes pretty well so I've not bothered to look. Mike, I'm of the opinion that if something isn't broken not to fix it. Should I take a look in this case?
Mike Beck
Goo Roo
New Zealand
BMW E36 Coupe 1UZFE V8 340i

Posts: 5407
Reg: 11-2005

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Tuesday, October 04, 2011 - 09:31 pm, by:  Mike Beck (Gold_40gt) Quote hilighted text Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)

I would repair them anyway, if they leak on the board, they can damage the delicate copper wire tracks... bye bye ecu!

So its more a precaution to take for something that will happen in due course.




I did some more investigating with my cars issues.

The AFM seems knackered. Runs well but rich without it

I've replaced 5 of the 8 capacitors in the ECU (the idiot at Jaycar mailed me too many of some and missing others - WTF)

I'm going INTO the store tomorrow to get the right ones so I will re-do it again Wednesday night.

I cleaned up the tired caps and rotors - they need replacing though so aren't helping by any means.

Leads checked out all ok resistance wise.

Spark plugs are ok, within gap, look fine.

Turns out the side coil pack was stuffed, the car would run with one cap lead off, but not with the other off, so based on that I swapped the side coil pack over with a using working one I had and it worked either way.

Ran much better on the road, the surging is gone, just a bit off a miss at certain throttle positions when going 20-30km/h.

I am hoping the other capacitors are faulty and causing this.

Other wise I will try another ECU.

My intention is to replace with all new OEM Coils, caps, rotors and even igniters as I doubt they are very healthy anymore.
Brett Harrison
DieHard
QLD
JZZ30

Posts: 784
Reg: 09-2005

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Tuesday, October 04, 2011 - 10:21 pm, by:  Brett Harrison (Bretto) Quote hilighted text Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)

James, "If it aint broke don't fix it" well that old saying should be kicked to the curb, I say fix it before it breaks, or creates a much bigger and more expensive problem.

Replacing all the ignition parts certainly sharpens the 1U.

Both my 1U'S run better with AFM disconnected, doesn't mean AFM is screwed though, only problem is rev limit then cuts in at 5,500.

Ive never looked at checking nor replacing igniters, I always thought these just died, rather than deteriorated. I'd be interested in how you would check these ?
Mike Beck
Goo Roo
New Zealand
BMW E36 Coupe 1UZFE V8 340i

Posts: 5408
Reg: 11-2005

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Wednesday, October 05, 2011 - 09:18 pm, by:  Mike Beck (Gold_40gt) Quote hilighted text Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)

I've replaced all the ECU caps.

Better, but the miss is still there once it warms up

Evidentially the OTHER old coil pack is playing up, so I've got two new ones on the way + rotors and distributors.

If it's still there I'll get a couple of 'working' second hand ignitors.

The AFM is also stuffed, so I have another 'working' one on the way.

Hopefully this will solve my electrical issue for the time being.

Looking forward to getting a working AFM, not a fan of the weird gear shifting pattern and 5500rpm rev limit - not to mention the pathetic economy!
James Buchan
Goo Roo
Vic
V8

Posts: 1191
Reg: 10-2008

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Wednesday, October 05, 2011 - 09:23 pm, by:  James Buchan (Jrbuch) Quote hilighted text Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)

I'm $hit when it comes to soldering, nor would I know what the right caps are to use.

Still, it's making close to 180rwkw with no performance dramas so I'm pretty happy with how it's going. It must be in decent health
Mike Beck
Goo Roo
New Zealand
BMW E36 Coupe 1UZFE V8 340i

Posts: 5409
Reg: 11-2005

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Wednesday, October 05, 2011 - 10:27 pm, by:  Mike Beck (Gold_40gt) Quote hilighted text Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)

Yeah first time I've soldered in about a year.

I re did it today, came out good this time.

I used some proper Japanese solder (returned the chinese crap to Jaycar)

I find the trick is to just cut the old caps off their leads and solder the new leads to the old leads.

That way you don't risk over heating the board or lifting the copper board tracks trying to remove the old solder/wires.

:-)

Mmm 180rwkw.

My car would only be putting out 120-140rwkw max.

As it is now its got more than enough power, I really need to upgrade the suspension/tires and diff - brakes are probably ok at this stage as the weight has gone down, although Ill probably replace them with 325mm 330i rotors eventually.
Mike Beck
Goo Roo
New Zealand
BMW E36 Coupe 1UZFE V8 340i

Posts: 5411
Reg: 11-2005

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Friday, October 07, 2011 - 06:17 pm, by:  Mike Beck (Gold_40gt) Quote hilighted text Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)

Temporary exhaust I'm running, what was on the car before.

Twin 1.8-2.0" 328i twin system, Cats, x pipe, resonators and a Remus dual in dual out muffler.



Later I'll be upgrading the headers, running 2.5", high flow cats, twin non balanced resonators, swap-able with a twin H pipe resonator section out to twin Audi RS4 mufflers.

Sporty...
Nige Turner
Tinkerer
VIC
V8

Posts: 8
Reg: 01-2013

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Sunday, July 28, 2013 - 08:21 pm, by:  Nige Turner (Grommit) Quote hilighted text Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)

Mike, I know this is a couple of years old, but please, can you update as to whether or not you finally fixed your issue here.

Thanks! :-)
Mike Beck
Goo Roo
New Zealand
BMW E36 Coupe 1UZFE V8 340i

Posts: 5749
Reg: 11-2005

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Sunday, August 04, 2013 - 12:08 pm, by:  Mike Beck (Gold_40gt) Quote hilighted text Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)


Nige Turner wrote on Sunday, July 28, 2013 - 08:21 pm:

Mike, I know this is a couple of years old, but please, can you update as to whether or not you finally fixed your issue here.




It seems the ECU was stuffed at the time, and one coil pack was playing up.
Nige Turner
Tinkerer
VIC
V8

Posts: 9
Reg: 01-2013

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Sunday, August 04, 2013 - 12:18 pm, by:  Nige Turner (Grommit) Quote hilighted text Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)


Mike Beck wrote on Sunday, August 04, 2013 - 12:08 pm:




Okay, cheers for the update. My v8 runs fine with the maf unplugged, but when it's plugged in and the car is up to temp it misses and mucks around under load..

I guess it could be ecu, I've replaced caps.. tested coils, leads, got new plugs..

I'll keep researching, and fiddling.

Cheers mate.
Mike Beck
Goo Roo
New Zealand
BMW E36 Coupe 1UZFE V8 340i

Posts: 5752
Reg: 11-2005

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Sunday, August 04, 2013 - 12:35 pm, by:  Mike Beck (Gold_40gt) Quote hilighted text Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)

Also check the EFI temp sender on the front bypass bridge.

Have you had your ECU capacitors replace with top end ones? From what I gather it's preferable to get the best quality ones around. I've used the Jaycar ones and some of them failed within a short time, even though I was careful installing them with the soldering heat.

It's probably a good idea to get another AFM to test against yours.

The trouble with just removing the plug from the AFM is that it runs a default base setting and also rules out other sensors that could be playing up, so you are better to test things with the AFM plugged in.
Nige Turner
Tinkerer
VIC
V8

Posts: 10
Reg: 01-2013

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Sunday, August 04, 2013 - 12:45 pm, by:  Nige Turner (Grommit) Quote hilighted text Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)


Mike Beck wrote on Sunday, August 04, 2013 - 12:35 pm:




I've tested maf/afm as per repair manual specs, it's within range.

Fault occurred as soon as it warned up with caps replaced. Don't think pcb was damaged, but can't be 100% on that.

Do you happen to know what other sensors are bypassed when afm is unplugged?

I'll have to search re efi temp, not read about that yet.

Thanks for the suggestions etc :-)
Nige Turner
Tinkerer
VIC
V8

Posts: 16
Reg: 01-2013

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Saturday, August 24, 2013 - 08:57 pm, by:  Nige Turner (Grommit) Quote hilighted text Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)

Mike, is the EFI sender you're referring to listed as the "EGR Gas Temp Sensor" in the manual? (Page EG-330)

Thanks mate.

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