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General E46 Forum
This is the place to get answers, opinions and everything you need related to your E46 (sedan, coupe, convertible and wagon) BMW!

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Old 05-29-2012, 10:26 PM   #1
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Join Date: May 2012
Location: Melbourne
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My Ride: Bmw 318i e46 1999
Bmw 318 e46 cold start problem / cuts out

Having trouble starting my bmw in the morning when its cold. I've taken it to two garages and there are no fault codes on the computer. I've replaced the MAF myself but it does not it seem to have made a difference. When its warmer I can start it easier, I need to rev it a bit then it will idle at around 1000rpm, seems fine on the open road too. Any help would be appreciated.

Made a quick vid which shows the issue.
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Old 05-30-2012, 04:49 AM   #2
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Join Date: Oct 2009
Location: Paisley Scotland
Posts: 162
My Ride: 323ise 1999 saloon
Hi. I have had the same problem for 3yrs, your cold is not as bad as ours but I have changed nearly every sensor and hose and still no luck. Good luck. Jim
PS Start with your vacuum hoses.
The older I get the wrong bit gets stiff!!

Last edited by jcjdavis1; 05-30-2012 at 04:50 AM. Reason: Just watched the vid.
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Old 05-30-2012, 06:02 AM   #3
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My Ride: '99 328i 300K miles
Check the sap hose from pump to valve...check the valve for a clog in the inlet (from decayed hose collecting inside it like mine).
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Old 05-30-2012, 08:39 AM   #4
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This happened to me once (318i N42 engine). I just had my solenoid o-rings replaced.

I removed them, cleaned my solenoids and installed them again. Then the sputtering went away.
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Old 07-10-2015, 03:30 PM   #5
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Join Date: Jul 2015
Location: Johannesburg
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My Ride: BMW E46 318
Hi guys,I also have the same problem and I don't seem to understand which solenoid and sap hoses they are talking about.pls pls please help.

Last edited by Rocktion; 07-10-2015 at 03:31 PM.
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Old 07-10-2015, 03:45 PM   #6
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Location: Riverside, CA
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My Ride: 325Ci 330Ci 530i 750
Check the fuel pressure. The fuel pump may be failing.

What are the trouble codes you read with your OBD code reader? Not sure if your car has an OBD plug or not.
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