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E46 M3 (2001-2006) Engine: S54 - Max Hp: 333 hp at 7,900 rpm / 262 lb/ft at 4,900 rpm
Total Produced: 45,000+ - Years Produced: 2001 to 2006.


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Old Fri, Jun-07-2019, 03:40:05 AM   #81
Race M3
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Default Re: Warm Start Problem

Any updates?
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Old Fri, Jun-07-2019, 02:31:00 PM   #82
wolffbimmer
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Default Re: Warm Start Problem

I got the fuel pump put in yesterday. I went over my GF's after and it sat for a good 5-6 hours while it was hot out and it started right up no issue. It almost always did it when I left there. So far so good but I'll know more during the next week of leaving work and how it behaves.
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Old Mon, Jun-10-2019, 02:56:09 PM   #83
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Default Re: Warm Start Problem

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Originally Posted by wolffbimmer View Post
I got the fuel pump put in yesterday. I went over my GF's after and it sat for a good 5-6 hours while it was hot out and it started right up no issue. It almost always did it when I left there. So far so good but I'll know more during the next week of leaving work and how it behaves.
What did you do at your girlfriends house for 5-6 hours ehh ??
jk, wish everything works out for you so I could get my car fixed also
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Old Tue, Jun-11-2019, 04:06:46 AM   #84
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Default Re: Warm Start Problem

Same here, its driving me crazy, I read so much about this issue and found out there are different solutions that fixed this problem..I have 2 codes that I didnt think were related but now I might have coolant temp sensor that's bad, the code is p0128- coolant thermostat temp below.... I replaced water pump and thermostat (OEM) so I know it's not that, it must be the coolant temp sensor which may be causing this issue.
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Old Tue, Jun-11-2019, 04:11:53 AM   #85
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Default Re: Warm Start Problem

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Same here, its driving me crazy, I read so much about this issue and found out there are different solutions that fixed this problem..I have 2 codes that I didnt think were related but now I might have coolant temp sensor that's bad, the code is p0128- coolant thermostat temp below.... I replaced water pump and thermostat (OEM) so I know it's not that, it must be the coolant temp sensor which may be causing this issue.
Yes, very likely

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Old Thu, Jun-13-2019, 02:38:55 PM   #86
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Default Re: Warm Start Problem

I reread the entire thread and it sounds like I will just take the hit and replace the fuel pump.
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Old Thu, Jun-13-2019, 03:10:03 PM   #87
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Default Re: Warm Start Problem

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I reread the entire thread and it sounds like I will just take the hit and replace the fuel pump.
Mine has still been fine in several situations where it would have normally done the no start. I'll report back if it happens but so far it's been fine. The cheapest place to get it is on Ebay. It's 383 or so shipped. Genuine bmw and comes with the gasket. Be very careful putting the new pump through the new gasket, if you get it pinched you'll have fuel smell and leak when full. Also make sure your tank is at least at 1/4 tank or lower.
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Old Thu, Jun-13-2019, 06:04:46 PM   #88
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Default Re: Warm Start Problem

Glad that it sounds like the problem is now solved. Zimmie called it in post #2 haha.
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Old Thu, Jun-13-2019, 06:07:45 PM   #89
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Default Re: Warm Start Problem

And as I said KUDOS to him. I really didn't think it would cause the issue.
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Old Thu, Jun-13-2019, 06:25:49 PM   #90
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Default Re: Warm Start Problem

Well I'm next, will order new fuel pump next week. Thank you Wolffbimmer and everyone else!
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Discussing Warm Start Problem in the E46 M3 (2001-2006) Forum - Engine: S54 - Max Hp: 333 hp at 7,900 rpm / 262 lb/ft at 4,900 rpm
Total Produced: 45,000+ - Years Produced: 2001 to 2006. at BMW M3 Forum.com (E30 M3 | E36 M3 | E46 M3 | E92 M3 | F80/X)