Is anyone experiencing a rough idle?? - Page 2

kkriskal · 01-07-2018, 01:42 PM

Quote:

Originally Posted by BMWM.D.

This is the ZL1 section, and we have a different engine. So not apples to apples. But every modern small block I’ve owned has had a bit of a rough idle. It’s just how they are. There’s also a cat warmup routine (that usually retards the timing) that can make the idle rougher.

I’d say what you’re feeling is totally normal, and there probably isn’t anything the dealer can do about it. You can probably reduce or eliminate it with tuning software (bump idle speed, turn off catalyst warmup, etc.), but obviously there are consequences to that.

Hello BMWM.D, I am sorry, new to this forum so did Not realize until now that it was ZL1 section. However, thank you for the clarification, if it Normal then I don't want to do anything, it actually sounds cool like the old age carb models especially with the Track mode exhaust option. Just wanted to make sure it was normal, thanks again for your clarification.

CRF8 · 01-07-2018, 02:29 PM

Quote:

Originally Posted by CRF8

I’m no expert, and have no mods, but I do have a rough idle. No codes

Sorry didn’t see it’s the ZL1 section, I’m on my
Phone and that column is hidden unless I scroll

kwav8r · 01-07-2018, 03:22 PM

Quote:

Originally Posted by NightfallZL1

Ok so I didn't notice this at first but I seem to have somewhat of a rough idle you can feal it sitting in the car in park. I'm not sure if this is because of power/large camshaft or something is wrong. No check engine lights are on.

Normal. Mine does this as well (1900 miles) and also has an regular interval miss/skip. I haven't gone through the trouble to identify the time interval between misses, it's at least a minute I think.

I had a 2000 Fat Boy that had a similar miss. Kinda quirky for both to do the same thing. While I am curious to know why in this case I'm not worried about it.

kkriskal · 01-07-2018, 07:23 PM

Quote:

Originally Posted by kwav8r

Normal. Mine does this as well (1900 miles) and also has an regular interval miss/skip. I haven't gone through the trouble to identify the time interval between misses, it's at least a minute I think.

I had a 2000 Fat Boy that had a similar miss. Kinda quirky for both to do the same thing. While I am curious to know why in this case I'm not worried about it.

Thank you for your confirmation and feedback

KLR ZL1 · 01-07-2018, 07:35 PM

Quote:

Originally Posted by mlee

Totally normal... my 5th Gen Z did that too.

Same here MLEE on my 5G ZL1. Took it in teice and was told it was with in perimeters. My 2017 ZL1 is not like that.

kkriskal · 01-08-2018, 06:07 PM

Quote:

Originally Posted by KLR ZL1

Same here MLEE on my 5G ZL1. Took it in teice and was told it was with in perimeters. My 2017 ZL1 is not like that.

Thank you, I am glad it is a known behavior and widespread.

f.d · 12-21-2018, 02:46 PM

I have the same thing, I feel like there is a misfiring from the first day. 2018 Camaro SS Auto, brand new.
Now today it's just 2600 km.
I did scan for Idle, and it shows fast swinging +15 rpm to -15 rpm .
It’s never stable.
I forget what was the Idle rpm , maybe it’s swinging between 550 rpm to 580 rpm very very fast swinging.
No codes & no problems.
Sorry for bad English, I’m just trying to help.

adnan92 · 10-05-2021, 05:35 AM

Im also having this issue i almost changed everything cam sensor,crank sensor, injectors, mechanical fuel pump, pcv, map sensor, maf, fuel lines , spark plugs and wires, and all procedures for cleaning throttle and fuel sys .
Sometimes i have hard shifting from 1st to 2nd and from park to reverse . No codes just Amplifier shorted circuit

JSH · 10-05-2021, 07:46 AM

Yes, mine feels and sounds pretty lumpy

LT4Greg · 10-05-2021, 08:47 AM

Yes my 2017 ZL1 does it too which is totally stock with the exception of the RF CAI. I see no problem with yours.

KingLT1 · 10-05-2021, 08:51 AM

It's normal for GM small blocks. If it was misfiring past a certain threshold of what GM considers acceptable then you would get a check engine light. The ECU's are pretty smart so if there is a issue your dash is gonna light up.

Camaro1973 · 10-05-2021, 09:09 AM

Quote:

Originally Posted by JSH

Yes, mine feels and sounds pretty lumpy

LOL JSH, do you sniff glue while reading and responding?

The guys car runs rough, he doesnt have a cam.. lol....

Send me whatever your huffing.

JSH · 10-05-2021, 10:22 AM

It called sarcasm, particularly if one reads my sig. Pot is legal in CO, so...

Quote:

Originally Posted by Camaro1973

LOL JSH, do you sniff glue while reading and responding?

The guys car runs rough, he doesnt have a cam.. lol....

Send me whatever your huffing.

FoundNemo · 10-06-2021, 07:38 AM

Huffing pot is an interesting term lol. Is it canned green?

10-05-2021, 07:46 AM	#23
JSH Drives: '20 ZLE Join Date: Jun 2020 Location: Mile High Posts: 4,195	Yes, mine feels and sounds pretty lumpy __________________ 2020 ZL1LE A10. LME LT4 390 short block, LME CID Heads, Kong E2650, FBO. 15" conversion, MT ET Street R 325/15. 100 octane: 1045hp/1055tq. 100 octane + Meth (1x10+): 1117 hp/1067 tq

10-05-2021, 08:47 AM	#24
LT4Greg Drives: 2017 Camaro ZL1 Coupe Join Date: May 2016 Location: Georgia Posts: 5,875	Yes my 2017 ZL1 does it too which is totally stock with the exception of the RF CAI. I see no problem with yours. __________________ ZL1 Coupe, PDR, Exposed carbon fiber hood insert, My Link with Nav, M6 6 speed and Silver Ice Metallic. Mods done: ceramic window tint, GM Accessories Camaro floor mats and Roto-Fab CAI.

10-05-2021, 08:51 AM	#25
KingLT1 Drives: 2016 1SS NFG A8 Join Date: Aug 2017 Location: 46804 Posts: 7,665	It's normal for GM small blocks. If it was misfiring past a certain threshold of what GM considers acceptable then you would get a check engine light. The ECU's are pretty smart so if there is a issue your dash is gonna light up. __________________ 2016 NFG SS A8/Whipple 2.9/Fuel System/Flex Fuel

12-21-2018, 02:46 PM	#21
f.d Drives: camaro Join Date: Feb 2014 Location: Every day some were Posts: 118	I have the same thing, I feel like there is a misfiring from the first day. 2018 Camaro SS Auto, brand new. Now today it's just 2600 km. I did scan for Idle, and it shows fast swinging +15 rpm to -15 rpm . It’s never stable. I forget what was the Idle rpm , maybe it’s swinging between 550 rpm to 580 rpm very very fast swinging. No codes & no problems. Sorry for bad English, I’m just trying to help.

10-05-2021, 05:35 AM	#22
adnan92 Drives: Camaro 2ss 2016 Join Date: Apr 2020 Location: KSA Posts: 7	Im also having this issue i almost changed everything cam sensor,crank sensor, injectors, mechanical fuel pump, pcv, map sensor, maf, fuel lines , spark plugs and wires, and all procedures for cleaning throttle and fuel sys . Sometimes i have hard shifting from 1st to 2nd and from park to reverse . No codes just Amplifier shorted circuit

10-06-2021, 07:38 AM	#28
FoundNemo Drives: 2019 ZL1 Join Date: Oct 2019 Location: GA Posts: 573	Huffing pot is an interesting term lol. Is it canned green?

User Name		Remember Me?
Password