Rough startup

Likeanowl · 10-13-2019, 01:15 PM

Lately I’ve noticed that maybe 1 in every 5-6 start ups the car seems to grunt a bit before it starts. Almost like in the winter when it’s really cold. Then briefly last week I had a CEL light come on for only a day before it went away again. Other than that, no other negative symptoms with the car. The light went away before I could get the code read. Any ideas?

6SPD GOD · 10-13-2019, 05:49 PM

Quote:

Originally Posted by Likeanowl

Lately I’ve noticed that maybe 1 in every 5-6 start ups the car seems to grunt a bit before it starts. Almost like in the winter when it’s really cold. Then briefly last week I had a CEL light come on for only a day before it went away again. Other than that, no other negative symptoms with the car. The light went away before I could get the code read. Any ideas?

By the signs and symptoms you mentioned, it looks like you probably ran E85 using JB4 with cheap intakes like BMS or VRSF and never bothered to gap the plugs or replace the plugs.

RoundelM3 · 10-14-2019, 07:14 AM

Have you checked for error codes with an OBDII code reader? That's what any dealership or independent repair shop would do, and it's the only way to determine the root cause.

coldfish · 10-14-2019, 08:15 AM

Quote:

Originally Posted by Likeanowl

Lately I’ve noticed that maybe 1 in every 5-6 start ups the car seems to grunt a bit before it starts. Almost like in the winter when it’s really cold. Then briefly last week I had a CEL light come on for only a day before it went away again. Other than that, no other negative symptoms with the car. The light went away before I could get the code read. Any ideas?

is your car stock ?

Likeanowl · 10-14-2019, 09:01 AM

Car is not stock. Have not put e85 in it yet. Currently just jb4 and intakes.

JPOWER · 10-14-2019, 09:20 AM

This sounds like the Intakes. I had that happen to me with the Injen Intakes. It can also be your Spark plugs starting to give out. Either way let us know how you make out.

10-13-2019, 01:15 PM	#1
Likeanowl Captain 1152 Rep 711 Posts Drives: BMW F80 M3/ Yas Marina Blue Join Date: Aug 2019 Location: Ohio iTrader: (0)	Rough startup Lately I’ve noticed that maybe 1 in every 5-6 start ups the car seems to grunt a bit before it starts. Almost like in the winter when it’s really cold. Then briefly last week I had a CEL light come on for only a day before it went away again. Other than that, no other negative symptoms with the car. The light went away before I could get the code read. Any ideas?
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10-14-2019, 07:14 AM	#3
RoundelM3 Major General 1830 Rep 6,984 Posts Drives: 15 F80 M3, 22 G01 X3 30i Join Date: Apr 2010 Location: Wendell, NC iTrader: (2) Garage List 2022 BMW X3 [9.83] 2015 BMW M3 [6.50]	Have you checked for error codes with an OBDII code reader? That's what any dealership or independent repair shop would do, and it's the only way to determine the root cause. __________________ 2015 F80 ///M3 Sedan 7DCT Tanzanite, 2022 X3 sDrive30i 8AT Brooklyn Grey
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10-14-2019, 09:01 AM	#5
Likeanowl Captain 1152 Rep 711 Posts Drives: BMW F80 M3/ Yas Marina Blue Join Date: Aug 2019 Location: Ohio iTrader: (0)	Car is not stock. Have not put e85 in it yet. Currently just jb4 and intakes.
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10-14-2019, 09:20 AM	#6
JPOWER Second Lieutenant 159 Rep 282 Posts Drives: 2015 BMW M4 BLK VERT(F83) Join Date: Oct 2017 Location: NEW JERSEY iTrader: (0)	This sounds like the Intakes. I had that happen to me with the Injen Intakes. It can also be your Spark plugs starting to give out. Either way let us know how you make out.
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