1984 633csi will not start

[TomandJerrysBMW]

Hi
I have a 1984 633csi that will turn: but not start. The coil is ok but no spark when turning over.
what can I do??
Thanks
Harry

[Lantz]

wrong area for this question...

[CW6er]

With the key on, check for voltage between term 15 on the coil and ground. If no voltage, the ignition switch may be bad (see diagarm below).

Check the plugs for the Speed and Reference Sensors, the plastic gets brittle with age and can crack around the wire locking bail leaving the plug loose. Then check the Speed and Reference Sensors:

http://bigcoupe.com/ims/pic.php?u=21GvpX2&i=349


If the image doesn't open: http://www.stormpages.com/countchocula1/bmw/etm119.htm
http://www.stormpages.com/countchocula1/bmw/bmwetm119.jpg

[JRanmann]

Whilst on the subjcet CW ...

http://i254.photobucket.com/albums/hh93/JRanmann/Picture2-2.jpg

....both my Speed and Reference wire connectors (under hood) that appear to originally have been fixed to (and thru) the rectangular openings on the rear manifold brace have been damaged long ago by some in-a-hurry mechanic. Both connectors need replacement.

Also the connector's securing clip(s) were not replaced and are missing. I hadn't noticed how poor of a job he'd done until I looked a bit closer a few months ago. The 2 halves of each connector are taped together tightly but they are not held together by the connecor's clip wire anymore (as it's missing) the connectors are broken (were forced apart) and as said the connectors are not attached to the brace at all, as they should be thru the brace if my suspicions are correct.

This has recently given me concern as it's an unnecessary deficiency IMHO and quite debilitating (as above) as of course the car won't move run without the connection making good contact. According to the law of Murphy...someday this is gonna bite me in the u know where...when I least expect it, in the dark of course miles from home.

Do you show anywhere a good close up photograph of the brace with both connectors secured in place and what type of clip originally held them solidly to the brace? (need 2)

Also, would I be required to replace both sensors with their respective wires (flywheel side) and how do I repair the connector on the loom side as if it's replaced aside from soldering on the new one or purchasing a new harness complete? (are these connectors readily solder-able or?)

[alpinacsi]

Those connectors are notorious for crumbling after years of use and will no longer stay in the bracket once this happens. The connector on the sensor side is replaceable and available from the dealer but most people will replace the sensor as they do fail over time. The cable on them will get brittle and just replacing the connector will only delay the inevitable.


The connectors on the engine harness side (with the clip) is also available from the dealer and is supplied without the wire terminals. You can extract the leads from the connector and reinsert them in a new connector or you can buy new terminals and crimp them on. These connectors are similar to the injector connectors but with 3 pins instead of 2. They can be removed with an extraction tool or the plastic connector can be broken away to remove the terminals for reinsertion into the new connector. Note the orientation of the wires.



Hi
I have a 1984 633csi that will turn: but not start. The coil is ok but no spark when turning over.
what can I do??
Thanks
Harry


Check out this page:

http://my.att.net/p/s/community.dll?ep=16&groupid=160912&ck=

Very helpful page for sorting these issues.

[JRanmann]

That makes sense...I think I understand how the clip was supposed to be held together with the wire band ...

One question remains, WAS there originally a special sliding clip for each of the connectors that held that connector firmly in place, against the inside of support bracket so it would stay in it's rectangular opening ?

Ta!

[alpinacsi]

No extra clip. The connectors sandwiched the bracket with the sensor connector basically clipping into place.

[JRanmann]

I see, If I understand correctly the sensor end is sort of fixed into the opening with it's wire coming from below the bracket and the notches hold the clip end firm. For the loom end (male) it simply pushes on and then is retained by the box wire clip on the connector...and somenow it all stays in place!

Great thanks!

[CW6er]

The bottom connector (sensor end) has tiny plastic ears that snap into the bracket to hold it when you insert it up from below .... if they haven't broken off. Good news is you get new ones when you replace the sensor.

If you get the new harness plugs, get the new terminals as well. It's a bear getting fragile terminals out and they are easily broken, so have some spares.

[JRanmann]

The bottom connector (sensor end) has tiny plastic ears that snap into the bracket to hold it when you insert it up from below .... if they haven't broken off. Good news is you get new ones when you replace the sensor.

If you get the new harness plugs, get the new terminals as well. It's a bear getting fragile terminals out and they are easily broken, so have some spares.


Will comply and thanks again for that heads up as well (terminals) ...it's the last connection I want to have come apart when I'm hundreds of miles from home...I think I found the harness plugs in the ETM and realoem lists. You say it's the 3 wire connector for both?

03 Plug housing 3 POL. ? 12521706068 $11.33
04 Gasket 3-POL ? 61131358604 $8.31

http://www.realoem.com/bmw/diagrams/e/y/3.png