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E60 M5 and E61 M5 Touring Discussion 2005- Advertiser's Forum

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post #11 of 17 Old 7th April 2019, 09:52 AM Thread Starter
Awbimmer
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Originally Posted by Hasan Shaikh View Post
Do you have any fault codes related to the thermostat or the ambient temp sensor?
Hi Hasan, No new codes other than ones i am aware of. I've always had a battery drain sign for a long time and input that down to a faulty CD reader in my CCC coupled with my audio build that I'm sure is drawing more more.

I had the CD reader changed thinking drain problems will go away but no. Even if my car is on tender charger itll still come up with a sign 1st thing and then after a drive itll go away.



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post #12 of 17 Old 8th April 2019, 01:19 AM
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Usually starting fuel table is based on coolant temperature. Try switching out coolant temperature sensor, if that doesn't work, ask him to increase fuel pump function during start up above certain coolant temperature. Interesting find. Please keep us posted. Thank you. Ps. by fuel pump function, I meant increasing fuel delivery.

2006 E60 M5 with supersprint headers, mid pipe, and muffler without cat. Evolve R stage 3 tune.

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post #13 of 17 Old 8th April 2019, 03:43 AM
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Usually starting fuel table is based on coolant temperature. Try switching out coolant temperature sensor, if that doesn't work, ask him to increase fuel pump function during start up above certain coolant temperature. Interesting find. Please keep us posted. Thank you. Ps. by fuel pump function, I meant increasing fuel delivery.
This. I bet it's a start map issue.
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post #14 of 17 Old 8th April 2019, 02:10 PM
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Not sure if this is at all helpful, as I do not know the E60 fuel system that well, however I had a similar issue with my E53 4.8is, whereby it would start fine when cold but not well (extended cranking) when warm. Turned out to be a faulty check value on the return line.
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post #15 of 17 Old 8th April 2019, 02:18 PM Thread Starter
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Originally Posted by sunghyun7 View Post
Usually starting fuel table is based on coolant temperature. Try switching out coolant temperature sensor, if that doesn't work, ask him to increase fuel pump function during start up above certain coolant temperature. Interesting find. Please keep us posted. Thank you. Ps. by fuel pump function, I meant increasing fuel delivery.
This is interesting. I will be changing my coolant temp sensor this week and have just bought a new crankshaft sensor that will swap too.

I'll do it in step procedure so I know what caused my issue.

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post #16 of 17 Old 8th April 2019, 02:19 PM Thread Starter
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This. I bet it's a start map issue.
ESS have sent me the same file they sent originally which means they csnt be making the mistake on 3 different ocassions ....

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post #17 of 17 Old 8th April 2019, 04:23 PM
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ESS have sent me the same file they sent originally which means they csnt be making the mistake on 3 different ocassions ....

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Not sure what you mean. If their map has an issue, they can send it 100 times and still have the same issue...
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