12-02-2019, 09:33 PM | #1 |
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Idle issue on cold start only
I have 2012 bmw 335i. It has always had that type of idle after a cold start when you turn it on it almost hesitates for a second and then the rpm goes up with the loud cold start sound.
I recently got a new intercooler and charge pipe. Upgraded it all. When I start the car ONLY on a cold start when the car has sat for a good 5-6+ hours it hesitates and is louder then normal. And then goes too normal. If I drive around and start the car after let's say running errands it's fine. It's something that I'm ok with dealing with because it's only on a cold start but I'm just curious as to why it does that. Car is on stock spark plugs, no tune. Fully bolted. CP/IC/intake/DP. Car is driving phenomenal. I don't feel any leaks, open throttle and normal driving it's so much better then it was before I did the upgrade. I know it's not an O ring issue or anything like that. Just strictly cold start. Any one encounter this?
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2012 bmw 335i sedan
VRSF catless DP VRSF 5? HD IC Stock intake(had open before and was sick of noise) BMS CP 550i 351m rims with 275/245 set up. No tune as of yet. |
12-08-2019, 01:38 PM | #2 | |
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12-08-2019, 01:40 PM | #3 | ||
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Nonetheless, it hasn't done it since. I'm in Florida and we had a few days of morning 50 degree weather and since those cold days it hasn't done it. Very odd
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2012 bmw 335i sedan
VRSF catless DP VRSF 5? HD IC Stock intake(had open before and was sick of noise) BMS CP 550i 351m rims with 275/245 set up. No tune as of yet. |
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12-08-2019, 01:42 PM | #4 | |
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12-08-2019, 01:44 PM | #5 | ||
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Spark plus are stock which I plan to change once I tune but lately the start has been good and normal. It was just off during those cold days
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2012 bmw 335i sedan
VRSF catless DP VRSF 5? HD IC Stock intake(had open before and was sick of noise) BMS CP 550i 351m rims with 275/245 set up. No tune as of yet. |
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12-08-2019, 01:47 PM | #6 |
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Glad to hear it’s better now. If it begins doing it again swapping them out would probably help, especially if they’re stock and your MY2012. I have the same year and had to swap them out as soon a I tuned it.
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12-08-2019, 01:48 PM | #7 |
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What intake do you have? Usually cold start and rough idle are attributed to intake.
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12-08-2019, 01:48 PM | #8 | |
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2012 bmw 335i sedan
VRSF catless DP VRSF 5? HD IC Stock intake(had open before and was sick of noise) BMS CP 550i 351m rims with 275/245 set up. No tune as of yet. |
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12-08-2019, 01:50 PM | #9 | |
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2012 bmw 335i sedan
VRSF catless DP VRSF 5? HD IC Stock intake(had open before and was sick of noise) BMS CP 550i 351m rims with 275/245 set up. No tune as of yet. |
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12-08-2019, 01:54 PM | #10 | |
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I know many have luck with the 97506 so i guess it may just depend on the car. |
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12-08-2019, 01:56 PM | #11 | ||
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2012 bmw 335i sedan
VRSF catless DP VRSF 5? HD IC Stock intake(had open before and was sick of noise) BMS CP 550i 351m rims with 275/245 set up. No tune as of yet. |
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Jake From State Farm54.00 |
12-08-2019, 01:57 PM | #12 |
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12-08-2019, 01:58 PM | #13 |
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Which tune did you go with?
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2012 bmw 335i sedan
VRSF catless DP VRSF 5? HD IC Stock intake(had open before and was sick of noise) BMS CP 550i 351m rims with 275/245 set up. No tune as of yet. |
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12-08-2019, 02:03 PM | #14 |
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I went BM3 and opted for the WiFi agent. It is very user friendly and their customer service is awesome. I’ve heard good things about MHD as well and have a few buddies running it. I don’t think you can go wrong with either except MHD runs off of android only and doesn’t offer an apple option.
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