engine stopping when it gets warm

Post here for mechanical and engine topics such as fuel issues, transmission problems, rough idle, exhaust, electrical issues, etc

Moderators: GRNSHRK, ron, bfons

Post Reply
scarland
Posts: 26
Joined: Mon Oct 24, 2016 3:34 am
Location: Ballarat Victoria Australia

engine stopping when it gets warm

Post by scarland »

I have a 1988 E24 and have a peculiar problem . Start up from cold is fine take if for a drive goes well up until the indicator on the temperature gauge gets to mid range ( 12 oclock position )then is starts to falter and die . Wait a few moments it starts up but as soon as load is put on it it dies again , leave if for about 10 mins if fires up and will go for about a mile then die ?? frustrating . Thought it might be fuel blockage but if that was the case if would not unblock it self would it any ideas think heat has something to do with it

Quinton
User avatar
hornhospital
Platinum Member
Platinum Member
Posts: 2929
Joined: Sun Jul 11, 2010 6:46 pm
Location: Silverhill, AL
Contact:

Re: engine stopping when it gets warm

Post by hornhospital »

It could be fuel blockage at the sock filter on the in-tank pump. Trash in the bottom of the tank can be sucked into/over the filter. Engine dies due to fuel starvation. Suction gone from the pick-up, the trash falls away until the engine is started again, cycle repeats.
Ken Kanne
'84 633CSi "Sylvia"; '85 635CSi "Katja";'85 325e "Hazel Ann"; '95 M3 "Ashlyn"
User avatar
86_6series
Platinum Member
Platinum Member
Posts: 1069
Joined: Mon Apr 02, 2007 10:08 pm
Location: West Nyack, NY

Re: engine stopping when it gets warm

Post by 86_6series »

Check temp switch on the thermostat housing.

Step # 7

http://www.hiperformancestore.com/motronic.htm
86-635CSi
96-MB C220 SOLD
98-740i
71-Continental MK3
scarland
Posts: 26
Joined: Mon Oct 24, 2016 3:34 am
Location: Ballarat Victoria Australia

Re: engine stopping when it gets warm

Post by scarland »

Thanks 86- 6 series will check and replace any other ideas relays etc getting hot ,also how does one check the fan system does not seem to sound when it should be used ???
Scarland
scarland
Posts: 26
Joined: Mon Oct 24, 2016 3:34 am
Location: Ballarat Victoria Australia

Re: engine stopping when it gets warm

Post by scarland »

Thanks for the suggestions Thermostat temp control all okay no sediment in the tank so any other ideas its seems to be only when its warm

any other suggestions Scarland
scarland
Posts: 26
Joined: Mon Oct 24, 2016 3:34 am
Location: Ballarat Victoria Australia

Re: engine stopping when it gets warm

Post by scarland »

I forgot to ask is there any fault codes with the BMW 635 that can indicate the faults ???
Scarland
User avatar
Brucey
6 Series Guru
6 Series Guru
Posts: 10077
Joined: Fri Apr 09, 2004 7:17 am
Location: Cambridge, UK

Re: engine stopping when it gets warm

Post by Brucey »

scarland wrote: Wed Nov 14, 2018 11:40 pm I forgot to ask is there any fault codes with the BMW 635 that can indicate the faults ???
Scarland
on most models, no. There is a limited fault code function on later models. I have rarely heard of anyone correctly diagnosing a fault with it though....

bad solder joints in the ECU can cause exactly the symptoms you describe. I have heard of crank sensors becoming erratic this way too.

cheers
~~~~~~~~~~~~Brucey~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
ron
Platinum Member
Platinum Member
Posts: 4569
Joined: Sat Jul 10, 2004 11:35 am
Location: South Wales U.K.

Re: engine stopping when it gets warm

Post by ron »

To "scarland". You were asked on 29th Oct.in a PM to put your LOCATION in your profile.

Please comply.
They are ALWAYS rustier than you thought!!!!!!
'85 M #228
'87 M #367
'88 High line.
'10 X5
‘84 Alfasud 1.5 ti
daz635
Posts: 102
Joined: Sat Jul 20, 2013 7:26 am
Location: Brisbane, Australia

Re: engine stopping when it gets warm

Post by daz635 »

Main relay or Fuel Pump relay can give intermittent issues when hot
'86 Euro 635 #1887204 Schwartz (086) Buffalo Schwartz Interior
Image
scarland
Posts: 26
Joined: Mon Oct 24, 2016 3:34 am
Location: Ballarat Victoria Australia

Re: engine stopping when it gets warm

Post by scarland »

A new ECU already replaced am I am looking for an Electrical Diagram set for my 88 model where can I obtain a set please , still checking out all relays etc etc and sensors such an arduous task to find . We ran the car to warm while stationary and does not stop only when you drive the car might give a clue .
User avatar
sharkfan
Platinum Member
Platinum Member
Posts: 2235
Joined: Tue Sep 28, 2004 3:14 pm
Location: Guildford, U.K.

Re: engine stopping when it gets warm

Post by sharkfan »

scarland wrote: Sat Nov 17, 2018 1:34 am A new ECU already replaced am I am looking for an Electrical Diagram set for my 88 model where can I obtain a set please , still checking out all relays etc etc and sensors such an arduous task to find . We ran the car to warm while stationary and does not stop only when you drive the car might give a clue .
If you post where you are in the world someone might be able to help you ?
2001 Alpina B10 V8 Touring (1 of 12 rhd)
1997 Alpina B12 5.7 L (1 of 2 rhd)
1995 Alpina B10 4.6 Touring (1 of 1 rhd)
1985 BMW M635CSi (1 of 524 rhd)
1982 BMW 635CSiA (1 of 100's left from the 1000's made and still valiantly fighting against a rusty grave)
User avatar
86_6series
Platinum Member
Platinum Member
Posts: 1069
Joined: Mon Apr 02, 2007 10:08 pm
Location: West Nyack, NY

Re: engine stopping when it gets warm

Post by 86_6series »

" I am looking for an Electrical Diagram set for my 88 model where can I obtain a set please"

http://wedophones.com/Manuals/BMW/1988% ... Manual.pdf
86-635CSi
96-MB C220 SOLD
98-740i
71-Continental MK3
scarland
Posts: 26
Joined: Mon Oct 24, 2016 3:34 am
Location: Ballarat Victoria Australia

Re: engine stopping when it gets warm

Post by scarland »

Thanks to all have now a 1988/9 electrical diagram and have been through the system ( checked fuel supply, tank, dirt,relays ect etc ecu seems the CRANK angle sensor is at fault and ordered a New One from BMW in Germany Thanks to all and hope that works any other comments always valuable
will report when it is in
Regards Scarland
ron
Platinum Member
Platinum Member
Posts: 4569
Joined: Sat Jul 10, 2004 11:35 am
Location: South Wales U.K.

Re: engine stopping when it gets warm

Post by ron »

Just be aware that most Electrical diagrams relate to the American spec.cars. In various places the Euro system differs.
They are ALWAYS rustier than you thought!!!!!!
'85 M #228
'87 M #367
'88 High line.
'10 X5
‘84 Alfasud 1.5 ti
scarland
Posts: 26
Joined: Mon Oct 24, 2016 3:34 am
Location: Ballarat Victoria Australia

Re: engine stopping when it gets warm

Post by scarland »

Well I have now replaced ECU, airflow, Idle control, plug leads, rotor cap , front engine sensor, two sensors on top of thermostat cover , fuel pumps both and filter fuel relay and still when warm stops . Took it from the work shop yesterd ay ran like a dream engine purred. temperature came up to miday on the temp guage as it was 30 deg C outside air . Pulled up outside my house and engine died . Switched off left for a few mins then switched on no problems and drove into garage and it dies SO WHAT NEXT ,, I am told it could be the fuel filter so bridge it out to check anything else I will pay $1000 if anyone can fix it
Also a little bit lumpy when starting cold but when warmed up beautiful idle
Scarland
User avatar
sharkfan
Platinum Member
Platinum Member
Posts: 2235
Joined: Tue Sep 28, 2004 3:14 pm
Location: Guildford, U.K.

Re: engine stopping when it gets warm

Post by sharkfan »

Change the main ecu and fuel pump relays.
2001 Alpina B10 V8 Touring (1 of 12 rhd)
1997 Alpina B12 5.7 L (1 of 2 rhd)
1995 Alpina B10 4.6 Touring (1 of 1 rhd)
1985 BMW M635CSi (1 of 524 rhd)
1982 BMW 635CSiA (1 of 100's left from the 1000's made and still valiantly fighting against a rusty grave)
scarland
Posts: 26
Joined: Mon Oct 24, 2016 3:34 am
Location: Ballarat Victoria Australia

Re: engine stopping when it gets warm

Post by scarland »

Hi Shark fan replaced the ecu and put in a new fuel relay still stops when warm after about 10 to 15 mins on the road in hot weather its 30 deg C today one comment from a BMW man was to bridge the fuel relay as this was a major problem when racing any more ideas Scarland
scarland
Posts: 26
Joined: Mon Oct 24, 2016 3:34 am
Location: Ballarat Victoria Australia

Re: engine stopping when it gets warm

Post by scarland »

sharkfan Is there a code reader or anything simlar for these 1988 models I see them on sale at pelican can they help Scarland
User avatar
sharkfan
Platinum Member
Platinum Member
Posts: 2235
Joined: Tue Sep 28, 2004 3:14 pm
Location: Guildford, U.K.

Re: engine stopping when it gets warm

Post by sharkfan »

Have you changed the main ECU relay; it has two output contacts and depending on the age of the relay and its internal configuration it can fail giving an output on one contact but not the other, which might stop the car.

The E24 is too old for any effective code indications from the ECU.
2001 Alpina B10 V8 Touring (1 of 12 rhd)
1997 Alpina B12 5.7 L (1 of 2 rhd)
1995 Alpina B10 4.6 Touring (1 of 1 rhd)
1985 BMW M635CSi (1 of 524 rhd)
1982 BMW 635CSiA (1 of 100's left from the 1000's made and still valiantly fighting against a rusty grave)
scarland
Posts: 26
Joined: Mon Oct 24, 2016 3:34 am
Location: Ballarat Victoria Australia

Re: engine stopping when it gets warm

Post by scarland »

Thanks Sharkfan I have not changed the main ECU relay will purchase and install Scarland back when done and tested Scarland
scarland
Posts: 26
Joined: Mon Oct 24, 2016 3:34 am
Location: Ballarat Victoria Australia

Re: engine stopping when it gets warm

Post by scarland »

Sharkfan I was also told that to check the fuel relay bridge it out and then run to check I am told the relays used to be a problem when racing due to heat generated also is the MAIN Relay the one you are talking about the ecu one THanks Scarland
User avatar
sharkfan
Platinum Member
Platinum Member
Posts: 2235
Joined: Tue Sep 28, 2004 3:14 pm
Location: Guildford, U.K.

Re: engine stopping when it gets warm

Post by sharkfan »

I know nothing of under-bonnet racing temperatures but the main relay ( on my 1982 car at least) is next to the fuel pump relay on the outside of the relay box. It too can be shorted out, and many of us do carry shorting straps for this reason, but it needs a one-to-two shorting strap as it has two outputs from one input.
2001 Alpina B10 V8 Touring (1 of 12 rhd)
1997 Alpina B12 5.7 L (1 of 2 rhd)
1995 Alpina B10 4.6 Touring (1 of 1 rhd)
1985 BMW M635CSi (1 of 524 rhd)
1982 BMW 635CSiA (1 of 100's left from the 1000's made and still valiantly fighting against a rusty grave)
scarland
Posts: 26
Joined: Mon Oct 24, 2016 3:34 am
Location: Ballarat Victoria Australia

Re: engine stopping when it gets warm

Post by scarland »

Thanks Shark Fan will have to get a lecy as am not a electrical man but thanks, is there any problems bridging at least it will confirm the fact that both are okay ??? Scarland
plip1953
Posts: 400
Joined: Mon Aug 13, 2018 4:15 pm
Location: Leeds

Re: engine stopping when it gets warm

Post by plip1953 »

Sorry if mentioned/covered already, but I've come a cross a situation where problems started occurring once everything get properly warmed through - and the cause was deteriorated rubber fuel lines that effectively collapsed once the fuel got hot ( which it will do as it's constantly flowing between tank and engine bay). If they are still original, my suggestion would be to replace all flexi fuel pipes throughout the engine bay and around the pump/filter/tank areas.
Phil
__________________________

1988 Highline 635 CSi
scarland
Posts: 26
Joined: Mon Oct 24, 2016 3:34 am
Location: Ballarat Victoria Australia

Re: engine stopping when it gets warm

Post by scarland »

By plip1953

Many Thanks for this one sent the car to have all its rubber fuel lines replaces and with report after that

Many Thanks an interesting fault scarland
Post Reply