|
|
Post Reply 
|
Page <12345 8> |
| Author | ||
phb10186 
Really Senior Member I 
Joined: 18-April-2005 Location: North London Status: Offline Points: 331 |
 Posted: 29-October-2005 at 09:13 |
|
|
OK a simple question: Turn the key and the car turns over and there is 12 Volts to the coil (and a new coil has been fitted today). There is still no spark to the king lead, and switching for another king lead does not yeild a spark.
Engine is earthed, and all the ECU's fuses etc etc are all fine - so what could be wrong, I just dont understand it?!?!?
Edited by phb10186 |
||
 
1985 635 CSI with Style 134's 1998 Z3 2.8i |
||
 |
||
| Sponsored Links | ||
|
||
|
omega man
Groupie 
Joined: 05-July-2005 Status: Offline Points: 90 |
Posted: 29-October-2005 at 09:49 |
|
|
ITS THE BLOODY DME RELAY, please belive me, just change it, dont know how you managed to test the old one. if you have a spare try it...
|
||
|
||
|
phb10186
Really Senior Member I
Joined: 18-April-2005 Location: North London Status: Offline Points: 331 |
Posted: 29-October-2005 at 10:47 |
|
|
I have substituted it in someone elses car and the car works fine - so the DME relay cant be bad, can it?
|
||
|
1985 635 CSI with Style 134's 1998 Z3 2.8i |
||
|
||
|
Drew540i
Really Senior Member II 
Available from all good newsagents! Joined: 15-August-2005 Location: The Mansfield Massive Status: Offline Points: 632 |
Posted: 29-October-2005 at 13:43 |
|
|
If there is 12v at the coil (15), it's not being triggered
by the ECU. Is there voltage at the other side of the coil (1)? If not, check for voltage at the ECU multiplug at terminal 1 - the black wire on the end. On this system, the ECU does the work of contact breaker points on an old relic like a Mini or 2002. If there is voltage at both coil + and coil -, the ECU for some reason isn't triggering the coil. Maybe, just maybe the TDC indicator lug has fallen off the flywheel. It happens - 525e's used to be well known for it. You'll have to remove the plastic 'grating' cover on the bellhousing and with a torch, look in the hole whilst you turn the engine over with a screwdriver on the flywheel ring gear teeth. It's a small raised, square lug and is very obvious. If it's fallen out, it's really a gearbox out job to repair although some have welded another one back on. My money is still on a bodged or broken wire due to a dodgy alarm install. One way or another, this *******car will run again!! 
|
||
|
||
|
Drew540i
Really Senior Member II
Available from all good newsagents! Joined: 15-August-2005 Location: The Mansfield Massive Status: Offline Points: 632 |
Posted: 29-October-2005 at 14:15 |
|
|
BTW you HAVE tried the DME relay - and not the
orange fuel pump relay............ The DME relay is either white plastic or silvery metal and has five pins. Pin 30 is for battery 12v, pin 85 is an earth (have you checked for a ground? Run a wire to battery minus!). I'm not sure what pin 86 does but 87(red/white) powers the injectors and feeds terminal 86 on the fuel pump relay. Terminal 87 (red and black wire) goes to terminal 35 on the ECU. So - check for 12v at terminal 30, 86 and the two 87's. There is also an earth point for the entire system on the engine - God knows where though. Probably a bunch of brown wires with an eyelet under one of the bolts securing the harness to the engine/manifold. |
||
|
||
|
omega man
Groupie
Joined: 05-July-2005 Status: Offline Points: 90 |
Posted: 29-October-2005 at 14:26 |
|
|
ok you say the dme relay is ok, can you take the inlet pipe off your fuel rail and then crank the engine over to see if there is fuel coming out of your inlet pipe, if not its the dme relay or your fuel pump. just try it in the morning.
|
||
|
||
|
phb10186
Really Senior Member I
Joined: 18-April-2005 Location: North London Status: Offline Points: 331 |
Posted: 29-October-2005 at 18:51 |
|
|
Fuel is coming through perfectly, Drew540i; what do you mean by (15) and (1)? Alarm installation is not to blame in my oppinion; old one went through the ignition, and its well and truly out of there. The new one is wired into the starter motor circuit, and it also works fine. I have isolated the problem to the coil electrics, since; as I have said, everything else checks out OK - but there is no spark coming from the coil; but the coil is getting 12 volts. It seems like a break in a cable, or a loose joint.... only question is where is the SOB! For sure... ECU's, relays, fuel, alarm OK. No Scotchlocs left; and I cant see anything obvious. Havnt checked terminal 1 on the ECU multiplug yet. Only thing that happened in between the last time that it started and now that could be responsible is the bonnet slamming. It does not seem to be a straight forward problem I think I need a shrink! Did I mention that the stereo is working perfectly??? |
||
|
1985 635 CSI with Style 134's 1998 Z3 2.8i |
||
|
||
|
Drew540i
Really Senior Member II
Available from all good newsagents! Joined: 15-August-2005 Location: The Mansfield Massive Status: Offline Points: 632 |
Posted: 30-October-2005 at 04:44 |
|
|
Hmmm - do BMW's have an impact sensor? Old
Jags used to, on the driver's A pillar. When you slammed the door really hard, the button would pop up cutting the fuel. Not sure if a 635CSi has got anything like this, but doubt it. Look on the coil and you'll see 15(Coil+) & 1(Coil -) You should have near enough 12v with the ignition on. This is why you need a multimeter and not just a 12v test light. Test for voltage here during cranking. Maybe you've got a big voltage drop during cranking. On old cars with points this was a problem so the 'ballast resistor coil' was invented to keep a full 12v going during cranking. If there is 12v there, there's nothing wrong with the ignition system - the coil is not being triggered. With a multimeter check also that you have voltage at the injectors (just pull a plug off). If you don't, it's an ECU related problem. Go and look for the flywheel trigger as well. If that's dropped off, you'll never get it going again. |
||
|
||
|
Horsetan
Really Senior Member II
Say Neigh to Gatsos Joined: 11-April-2003 Location: Please let it be Ireland Status: Offline Points: 6381 |
Posted: 30-October-2005 at 10:25 |
|
|
No impact sensor. I haven't got one on my '83, and Ben's hardly likely to have one either...... |
||
  
|
||
|
||
|
Horsetan
Really Senior Member II
Say Neigh to Gatsos Joined: 11-April-2003 Location: Please let it be Ireland Status: Offline Points: 6381 |
Posted: 30-October-2005 at 10:26 |
|
|
No it bloody well isn't! Ben's DME relay functioned perfectly in an E34 525i. |
||
|
|
||
|
||
|
phb10186
Really Senior Member I
Joined: 18-April-2005 Location: North London Status: Offline Points: 331 |
Posted: 30-October-2005 at 11:26 |
|
|
I dont want to start a civil war with this!
|
||
|
1985 635 CSI with Style 134's 1998 Z3 2.8i |
||
|
||
|
Horsetan
Really Senior Member II
Say Neigh to Gatsos Joined: 11-April-2003 Location: Please let it be Ireland Status: Offline Points: 6381 |
Posted: 30-October-2005 at 11:48 |
|
|
It's not civil war. It's uncivil war |
||
|
|
||
|
||
|
Horsetan
Really Senior Member II
Say Neigh to Gatsos Joined: 11-April-2003 Location: Please let it be Ireland Status: Offline Points: 6381 |
Posted: 30-October-2005 at 16:55 |
|
|
Funnily enough, this is what my mechanic Carlos came straight out with when I called him this evening...... Says it's the most common cause he's come across with "no-fires"..... |
||
|
|
||
|
||
|
phb10186
Really Senior Member I
Joined: 18-April-2005 Location: North London Status: Offline Points: 331 |
Posted: 30-October-2005 at 17:13 |
|
|
Is this pin part of the flywheel, or is it a separate part that can be renewed? I.E has anyone encountered this before, and what was the outcome? Would I need a new flywheel, and what has to come out/ dismantled. Let me please also stress that this is still unproven as the fault - and we are just hypothesising at the moment. |
||
|
1985 635 CSI with Style 134's 1998 Z3 2.8i |
||
|
||
|
Horsetan
Really Senior Member II
Say Neigh to Gatsos Joined: 11-April-2003 Location: Please let it be Ireland Status: Offline Points: 6381 |
Posted: 30-October-2005 at 18:02 |
|
Not having seen one ('cos not had this problem), cannot answer this. But you do end up having to go underneath the car anyway. |
||
|
|
||
|
||
|
eta.
Really Senior Member II
Joined: 21-October-2002 Location: United Kingdom Status: Offline Points: 599 |
Posted: 31-October-2005 at 11:06 |
|
|
No impact sensor. I haven't got one on my '83, and Ben's hardly likely to have one either...... [/QUOTE]I think the impact sensor is what BMW call an 'emergency switch' and e24's have them (even '83 models):- 10 EMERGENCY SWITCH 1 09/1983 09/1985 61311373323 ENDED 10 EMERGENCY SWITCH 1 09/1985 61311380302 This part can be found as part of the central locking system diagram here:- http://www.realoem.com/bmw/showparts.do?model=5382&mospid=47 199&btnr=41_0556&hg=41&fg=50 I am guessing there is reset procedure in the handbook. Edited by eta. |
||
|
||
|
phb10186
Really Senior Member I
Joined: 18-April-2005 Location: North London Status: Offline Points: 331 |
Posted: 31-October-2005 at 13:44 |
|
|
can this be caused by a bonnet slamming?? |
||
|
1985 635 CSI with Style 134's 1998 Z3 2.8i |
||
|
||
|
phb10186
Really Senior Member I
Joined: 18-April-2005 Location: North London Status: Offline Points: 331 |
Posted: 31-October-2005 at 13:58 |
|
|
Yes I have that! Its above the glove box, with a cover over it, mounted very close to the cruise control box. Its about the size of a mobile phone, and it is skrewed to a bit of moulding to conceal the wiring there. It has the part NO: 61311373323 on my car. http://www.realoem.com/bmw/showparts.do?model=5382&mospi d=47199&btnr=41_0595&hg=41&fg=50&hl=27 can anyone tell me about it, thew bonnet did slam in between it starting and non-starting, can this box cause the car not to start? Is there a reset procedure, and if so what is it? Edited by phb10186 |
||
|
1985 635 CSI with Style 134's 1998 Z3 2.8i |
||
|
||
|
Horsetan
Really Senior Member II
Say Neigh to Gatsos Joined: 11-April-2003 Location: Please let it be Ireland Status: Offline Points: 6381 |
Posted: 31-October-2005 at 16:32 |
|
My '83 owner's book says nothing about this impact sensor. This is complete news to me Edited by Horsetan |
||
|
|
||
|
||
|
northern_paul
Newbie
Joined: 03-October-2005 Location: South Coast Status: Offline Points: 10 |
Posted: 01-November-2005 at 05:53 |
|
|
I thought any car with Fuel Injection would have an impact cut off - the whole point being that if the fuel rail (high pressure) ruptures in an accident it is cut off before anything nasty can happen. On another note, I've got a gearbox and flywheel (Getrag 280) I can have a look for the 'lug' if you want and post pics - just let me know. |
||
|
||
|
Post Reply
|
Page <12345 8> |
|
| Forum Jump | Forum Permissions You cannot post new topics in this forum You cannot reply to topics in this forum You cannot delete your posts in this forum You cannot edit your posts in this forum You cannot create polls in this forum You cannot vote in polls in this forum |
Non-start ..the saga continues!
Topic Options
Drew540i wrote:
