jeffbebe 1559 Report post Posted July 15, 2014 Anyone know where this should go? Noticed it over the weekend while I've been servicing the car but can't find anything it should plug into. Looks like a sensor plug but not sure where it should go. It's got a reasonably long cable that appears to go into the DME box (though it's hard to trace that end of it). It was lying as pictured but could easily connect to something lower down... I just don't know what and can't see any obvious socket for it. Can anyone enlighten me? Quote Share this post Link to post Share on other sites
BreakMyWindow 1874 Report post Posted July 15, 2014 That looks like a Bosch EVP plug. Probably for the inlet temp sensor? Quote Share this post Link to post Share on other sites
jeffbebe 1559 Report post Posted July 15, 2014 That's what I figured but can't seem to locate the socket for it? Not sure if I'm blind or just being dumb... Or both. Quote Share this post Link to post Share on other sites
BreakMyWindow 1874 Report post Posted July 15, 2014 Page 9 maybe ? http://twrite.org/shogunnew/files/fontes/TopEnd_Refurbish.pdf Quote Share this post Link to post Share on other sites
jeffbebe 1559 Report post Posted July 15, 2014 That's very useful (for many things)! Cheers Quote Share this post Link to post Share on other sites
jeffbebe 1559 Report post Posted July 15, 2014 Page 9 maybe ? http://twrite.org/shogunnew/files/fontes/TopEnd_Refurbish.pdf Page 9 is a negative but am thinking p.19 is a definite possibility. Would make sense with the cable's location and would make sense why I can't see where it's supposed to go... Now to work out how to get at it to have a proper look. Another job to add to the list. Quote Share this post Link to post Share on other sites
KwS 2425 Report post Posted July 15, 2014 Surely if it was a sensor, it would be throwing a code? Quote Share this post Link to post Share on other sites
jeffbebe 1559 Report post Posted July 15, 2014 Some codes cannot be seen and I haven't scanned it yet. Quote Share this post Link to post Share on other sites
E30 325i Rag-Top 2956 Report post Posted July 15, 2014 Can you pull back the shroud to see the colours of the wires, then cross reference to a wiring diagram? It looks like a fairly generic- two pin sensor plug, so could cover a whole host of things - temp, pressure, etc. Might explain your horrendous fuel consumption if it's not connected to something it should be - like temp, thinks its cold so over-fuelling?? Quote Share this post Link to post Share on other sites
jeffbebe 1559 Report post Posted July 15, 2014 (edited) Exactly what I'm thinking, Jon. Looking at that PDF Martin posted on p.19 an obvious culprit (and well hidden) is the temp sensor at the rear of the manifold. You can't see it without removing stuff so could easily have been pulled out and then the PO have not known where to put it. EDIT: Hmmnnn... No joy with that one. Just can't see anywhere it could come from, will have to check wire colours as Jon suggests and see what that turns up. Edited July 15, 2014 by jeffbebe Quote Share this post Link to post Share on other sites
westy 614 Report post Posted July 15, 2014 May not actually be used for anything. There are always spare plugs on any car. Pretty dirty inside? suggests its never been plugged in? Could try searching for it here but might take ya a while http://www.bmw-planet.com/ Quote Share this post Link to post Share on other sites
beemn 50 Report post Posted July 15, 2014 Im sure one or two of my cars have plugs that are redundant, same thing....go to nothing Quote Share this post Link to post Share on other sites
jeffbebe 1559 Report post Posted July 15, 2014 May not actually be used for anything. There are always spare plugs on any car. Pretty dirty inside? suggests its never been plugged in? Could try searching for it here but might take ya a while http://www.bmw-planet.com/ Im sure one or two of my cars have plugs that are redundant, same thing....go to nothing You're probably both right but I'm just suspicious when the car is running super rich and there's a sensor-type plug not attached to anything! Quote Share this post Link to post Share on other sites
_ethrty-Andy_ 2132 Report post Posted July 15, 2014 All M70s run rich. in the DME box there is a temperature sensor that communicates with a fan in the box. Some markets the fan is wired to run all the time so no sensor. That would be my best guess. If its anything directly critically related to the running of the engine, there will be one exactly the same on the other side of the engine bay. so if there is only one, it wont be anything like inlet air temperature etc etc Quote Share this post Link to post Share on other sites
Allanw 1071 Report post Posted July 15, 2014 All M70s run rich. 30L/100kms rich??? Quote Share this post Link to post Share on other sites
jeffbebe 1559 Report post Posted July 15, 2014 DME temp sensor on the water coolant crossover pipe seems to be a common cause of rich running M70. If this plug is meant to connect to that sensor... Wherever it is, could explain shite fuel consumption. Will investigate further in daylight. Quote Share this post Link to post Share on other sites
_ethrty-Andy_ 2132 Report post Posted July 17, 2014 Cute that you are complaining about lack of room around the V12 in your enourmous engine bay on the earlier type M70 there are three sensors on the back of the head on right hand bank (drivers side on your car, between the head and the firewall), cant remember what they all do, but they are there, and i know one is for the cluster. one is probably DME and the other Fan or something like that. Im not sure if they are on the later M70/M73 but i can check tomorrow, its pouring with rain here so im not about to go check!! If you want me to take pictures I will of the 750iL thats here, the 550 Touring has no room, and is the earlier type engine anyways. Quote Share this post Link to post Share on other sites
jeffbebe 1559 Report post Posted July 17, 2014 (edited) Thanks Andy. I pulled the cabin filter assembly out yesterday to eyeball those 3 coolant sensors and they're all plugged in so I'm still in the dark but thinking more and more it's just a superfluous plug. Failing DME coolant sensor seems to be a common cause of over-fuelling (according to Google) and is a cheap replacement so might do that... Trouble is, I'm not entirely sure which of the 3 at the back is the DME one! PS All the space is at the front in the E31!! The frickin' sensors are all at the back!! Edited July 17, 2014 by jeffbebe Quote Share this post Link to post Share on other sites
Palazzo 477 Report post Posted July 17, 2014 How bad is the fuel consumption? I wouldn't expect anything better than 18-22l/100km around town and maybe 12.5 on a trip? Is it worse? Quote Share this post Link to post Share on other sites
hybrid 1043 Report post Posted July 17, 2014 BOOOOOOOOOOOOOOOST! Quote Share this post Link to post Share on other sites
jeffbebe 1559 Report post Posted July 17, 2014 How bad is the fuel consumption? I wouldn't expect anything better than 18-22l/100km around town and maybe 12.5 on a trip? Is it worse? Worse.... 14-15L/100 on a trip and 25L+ around town. BOOOOOOOOOOOOOOOST! Because that will solve all the problems, Josh! Quote Share this post Link to post Share on other sites
handgrenade 189 Report post Posted July 17, 2014 well if there is so much fuel getting dumped in there, you might as well compliment it with more air ... BOOOST 1 Quote Share this post Link to post Share on other sites
Palazzo 477 Report post Posted July 17, 2014 Worse than a 493hp S55 Kompressor, good effort. Hope it's a sensor or something. Quote Share this post Link to post Share on other sites
jeffbebe 1559 Report post Posted July 17, 2014 well if there is so much fuel getting dumped in there, you might as well compliment it with more air ... BOOOST Good point! Worse than a 493hp S55 Kompressor, good effort. Hope it's a sensor or something. Me too... Comms are down though so no point doing anything until I can find out why comms aren't working. BM Workshop said they would basically have to start the clock then unplug every module starting with the easiest, until the find the one that's causing the issue... Bugger! But better sorting that than throwing cash at parts on the off chance they are faulty. Quote Share this post Link to post Share on other sites
_ethrty-Andy_ 2132 Report post Posted July 18, 2014 (edited) Worse.... 14-15L/100 on a trip and 25L+ around town. Because that will solve all the problems, Josh! Yep thats worse than mine, best i have seen is 10.7L/100km and that was on a run to coromandle with my great grandma in the car..... usually 12 on the trip too or from Auckland, including passing every oppertunity, and a good bit of fun through the Ohakune National Park Road. But 25L/100km around town is very achievable. I have had mine in the 30s well if there is so much fuel getting dumped in there, you might as well compliment it with more air ... BOOOST hahaha Edited July 18, 2014 by _Ethrty-Andy_ Quote Share this post Link to post Share on other sites
