I can't remember who I am answering but:
-7 on additive adaptations is fine (as long as you have let the engine run long enough for the adaptations to have settled)
If your O2 sensor readings (raw value, not the integrated value) don't move then either the sensor has failed OR the mixture is too far out for the DME to correct with adaptations - you will get an 'adaptations have reached limit' error.
Timm..2007 E64 650i Individual Sport..1999 E31 840ci Individual Sport..ex owner of 2000 E38 740..1999 E38 740i V8 M62..1998 E38 735i V8..1993 E32 730i V8..1988 E28 518i
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Yes, that's a bit low for an E38 - with the mapped thermostat you are usually around 105C at idle - but as you get the mapped thermostat error I guess it has been removed or replaced with a fixed stat....
Timm..2007 E64 650i Individual Sport..1999 E31 840ci Individual Sport..ex owner of 2000 E38 740..1999 E38 740i V8 M62..1998 E38 735i V8..1993 E32 730i V8..1988 E28 518i
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My thermostat is stuck opens , I purchased a thermostat spacer as I read the 105 c is too high ( in Simmer the fuel is boiling in the tank when gets above 100c ) so what lower temp is best ? 85 , 88 , 95 ? No much difference in mileage
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An open thermostat will certainly increase fuel consumption as it will take forever to get any heat in the engine. 85C or 95C, either will do - but no thermostat will cause engine damage.
Timm..2007 E64 650i Individual Sport..1999 E31 840ci Individual Sport..ex owner of 2000 E38 740..1999 E38 740i V8 M62..1998 E38 735i V8..1993 E32 730i V8..1988 E28 518i
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Just a random thought to throw in - it's possible being Iraq that his car was delivered with the factory hot climate package? I got that here in Australia which meant a factory 80c thermostat... Even on 35c+ days I never see it go past 80c, it works remarkably well. Unless it was an import, in which case never mind!
Updated , I installed the stock thermostat , o2 sensors ( used I have previously ) the fuel economy is better city 11-12 mpg (4.5-5 km / l ) highway 17-20 mpg , thank you all , I also want to search for other causes as it's a bit lower than normal , this is the adaption values after 65 km run ( the engine is off )
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Last edited by haydar alameen; 11-24-2018 at 02:51 PM.
Those values are fine, nothing to worry about, so if you have poor economy then the air/fuel mixture is not the problem.
Timm..2007 E64 650i Individual Sport..1999 E31 840ci Individual Sport..ex owner of 2000 E38 740..1999 E38 740i V8 M62..1998 E38 735i V8..1993 E32 730i V8..1988 E28 518i
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now I use the stock thermostat, the mileage is better about 18mpg us highway . But I noticed the coolant is decreasing each 2 days about 1 liter ( only water I filled ) previously no or very little amount decreased when the open thermostat is in . No obvious leak
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Yes surely , I mean the 105 c degree which is higher than water boiling may cause evaporation of water or some thing like this ?
Do you mean re bleeding when cold ?
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Yes surely , I mean the 105 c degree which is higher than water boiling may cause evaporation of water or some thing like this ? also I notice the hoses have high pressure ! Is it normal for 110 c ?
Do you mean re bleeding when cold ?
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The cooling system is a closed, pressurised system - and although temperatures may reach well over boiling point of plain water the system is filled with coolant which has a higher boiling point. More importantly the system is under pressure (maximum 2-Bar) and that raises the boiling point significantly.
More info here:
https://www.meeknet.co.uk/e31/BMW_M6...ing_System.htm
Timm..2007 E64 650i Individual Sport..1999 E31 840ci Individual Sport..ex owner of 2000 E38 740..1999 E38 740i V8 M62..1998 E38 735i V8..1993 E32 730i V8..1988 E28 518i
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Chase - Heroes to a generation
Just top it off correctly after it sits overnight to get it propeely filled. Dipstick tip should be even with the opening of the expansion tank lip...
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Regarding economy , Timm said that it is not fuel air mixture problem so what else ? , I calculate it more accurately it is 14 L/ 100 km highway , 23 L/ 100 km city , at constant speed 80km/hr the eco 9 L / 100 km , @120 km/hr is 12 L / 100 km , all these records in normal style driving . The idle is low ~500 rpm
These last inpa data with recent adaption ( both banks was additive -2 multiplicative -3 . Air intake was low ! ~16 IMG_0845.jpgIMG_0846.jpgIMG_0847.jpg
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Clogged cat ???
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Yes, that or dodgy petrol!
Timm..2007 E64 650i Individual Sport..1999 E31 840ci Individual Sport..ex owner of 2000 E38 740..1999 E38 740i V8 M62..1998 E38 735i V8..1993 E32 730i V8..1988 E28 518i
My BMW Repair YouTube Channel
My Current 840ci Sport Individual
My Current 650ci Sport Individual
My E31 Repair and Information Website
My E38 Repair and Information Website
My E63/E64 Repair and Information Website
Chase - Heroes to a generation
A garage can check the back-pressure at the Lambda sensor points
Timm..2007 E64 650i Individual Sport..1999 E31 840ci Individual Sport..ex owner of 2000 E38 740..1999 E38 740i V8 M62..1998 E38 735i V8..1993 E32 730i V8..1988 E28 518i
My BMW Repair YouTube Channel
My Current 840ci Sport Individual
My Current 650ci Sport Individual
My E31 Repair and Information Website
My E38 Repair and Information Website
My E63/E64 Repair and Information Website
Chase - Heroes to a generation
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