Rattle after tune - Camaro5 Chevy Camaro Forum / Camaro ZL1, SS and V6 Forums

CamaroDreams07 · 11-21-2011, 11:33 AM

So I've had my Trifecta tune for a few days now, and it's pretty cool except one little issue. On cold startup, the car revs noticeably higher and there is a distinct rattle that can be heard as it peaks before going back down to idle. This is incredibly embarrassing to have this noise coming from a brand new car.

I'm sure the rattle is just a symptom of the higher cold RPMs but where should I start looking to isolate the cause? What's most likely, loose heat shield? I already replaced my tunnel brace so I'm 99% sure it's not the exhaust pipes hitting there.

I don't really know why the startup RPM is affected in the tune, I wish it wasn't.

bmorecam · 11-21-2011, 12:08 PM

No, the tune does not affect rpm. Do you have a manual or auto, and when you are driving do you notice your rpm higher or is it just at cold start up?

JChen · 11-21-2011, 12:18 PM

I have the same issue on my newly tuned Camaro! I installed my Trifecta tune last Wednesday. It's intermittent, however. I am trying to capture it on video but whenever I try to record it, the rattle doesn't happen.

It sounds like it's emminating from the middle of the undercarriage.

I'm not sure if it's a rattle or more of a clicking noise, but it's very rapid and only last for a second or two.

CiscoBee · 11-21-2011, 12:26 PM

I had the same and it turned out to be the bolts to the exhaust clamp was vibrating against the body at the high idle. I turned the clamp so the bolts were not close to the body.

The tune does not alter the idle, however the Ghost Cam at high idlel during cold start will make the car shake more causing more noice from vibration. After the initial cold start idle calms down it goes away.

CamaroDreams07 · 11-21-2011, 12:40 PM

It sure sounds like higher RPM. I guess that's just in my head. It only lasts for like a second, so pinning it down is going to be tricky.

SC2150 · 11-21-2011, 01:17 PM

Double check oil level. The VVT valvetrain is oil critical.

HopeRidesAlone · 11-21-2011, 03:02 PM

i have a rattle like that you explained but only at high rpms never at idol. Ever since i put the headers on im trying to track that one down

CamaroDreams07 · 11-21-2011, 04:02 PM

Quote:

Originally Posted by HopeRidesAlone

i have a rattle like that you explained but only at high rpms never at idol. Ever since i put the headers on im trying to track that one down

Its not at idle, it's at the high RPM the car hits when you start it. It only lasts as the RPMs peak at start up, then immediately quiets down. I've narrowed it down to the front half of the car, and the oil level is good.

HopeRidesAlone · 11-21-2011, 07:37 PM

i mean high rpms like wot high not just cold start and all at start up

jeff4946 · 11-21-2011, 07:40 PM

I got a slight rattle. I'm thinking its the internals of the catch can. That's when I got my rattle.

Amarr014 · 11-21-2011, 07:51 PM

mine does this two but i believe its something with the exhaust, its only on cold starts on the initial start up.... i think its some part of the exhaust rubbing against something.. will check it out tomorrow

JChen · 11-21-2011, 07:55 PM

Quote:

Originally Posted by Amarr014

mine does this two but i believe its something with the exhaust, its only on cold starts on the initial start up.... i think its some part of the exhaust rubbing against something.. will check it out tomorrow

When did you get your tune, Amarr014?

Amarr014 · 11-21-2011, 08:05 PM

just over a week ago

JChen · 11-21-2011, 08:16 PM

I got mine less than a week ago. I think CamaroDreams got his very recently as well. I wonder if this is isolated to newer tunes since I haven't heard of this issue with others who have had the Trifecta tune for a longer amount of time.

11-21-2011, 11:33 AM	#1
CamaroDreams07 Drives: Slow V6 Join Date: Jun 2009 Location: East Lansing, MI Posts: 9,361 View My Garage	Rattle after tune So I've had my Trifecta tune for a few days now, and it's pretty cool except one little issue. On cold startup, the car revs noticeably higher and there is a distinct rattle that can be heard as it peaks before going back down to idle. This is incredibly embarrassing to have this noise coming from a brand new car. I'm sure the rattle is just a symptom of the higher cold RPMs but where should I start looking to isolate the cause? What's most likely, loose heat shield? I already replaced my tunnel brace so I'm 99% sure it's not the exhaust pipes hitting there. I don't really know why the startup RPM is affected in the tune, I wish it wasn't. __________________ [B]

11-21-2011, 12:18 PM	#3
JChen Drives: 2010 SIM 1LT RS Join Date: Aug 2009 Location: Rockford, MI Posts: 313	I have the same issue on my newly tuned Camaro! I installed my Trifecta tune last Wednesday. It's intermittent, however. I am trying to capture it on video but whenever I try to record it, the rattle doesn't happen. It sounds like it's emminating from the middle of the undercarriage. I'm not sure if it's a rattle or more of a clicking noise, but it's very rapid and only last for a second or two. __________________ In: Airaid CAI Out: JBA Shorty Headers, MRT Axle-back Exhaust v1.0 Tuned by Trifecta

11-21-2011, 12:40 PM	#5
CamaroDreams07 Drives: Slow V6 Join Date: Jun 2009 Location: East Lansing, MI Posts: 9,361 View My Garage	It sure sounds like higher RPM. I guess that's just in my head. It only lasts for like a second, so pinning it down is going to be tricky. __________________ [B]

11-21-2011, 03:02 PM	#7
HopeRidesAlone Drives: 2010 Camaro Black 2SS/RS Join Date: Mar 2010 Location: Maryland Posts: 839 View My Garage	i have a rattle like that you explained but only at high rpms never at idol. Ever since i put the headers on im trying to track that one down __________________ 2010 Black 2LT/RS - Injen CAI, ARK DTS Catback Polished Tips, OBX LT Headers, Lowered on Eibach, 3/8 blackiceolator, Trifecta Tuned.- *Totaled 3/10/13* 2010 Black 2SS/RS - Stainless powers 1 7/8 LT headers, cold air inductions cai, Tuned by dynosteve, Feesler side skirt, Feesler Spoiler, Feesler carbon fiber bowties, H&R Lowering Springs.

11-21-2011, 07:37 PM	#9
HopeRidesAlone Drives: 2010 Camaro Black 2SS/RS Join Date: Mar 2010 Location: Maryland Posts: 839 View My Garage	i mean high rpms like wot high not just cold start and all at start up __________________ 2010 Black 2LT/RS - Injen CAI, ARK DTS Catback Polished Tips, OBX LT Headers, Lowered on Eibach, 3/8 blackiceolator, Trifecta Tuned.- *Totaled 3/10/13* 2010 Black 2SS/RS - Stainless powers 1 7/8 LT headers, cold air inductions cai, Tuned by dynosteve, Feesler side skirt, Feesler Spoiler, Feesler carbon fiber bowties, H&R Lowering Springs.

11-21-2011, 12:08 PM	#2
bmorecam Account Suspended Drives: jealous vendors mad!! HAHA!! Join Date: Jan 2011 Location: CYBERGMONSTER@GMAIL.COM Posts: 3,658 View My Garage	No, the tune does not affect rpm. Do you have a manual or auto, and when you are driving do you notice your rpm higher or is it just at cold start up?

11-21-2011, 12:26 PM	#4
CiscoBee Account Suspended Drives: 2010 Camaro Rally Yellow 2LT Join Date: Aug 2009 Location: Smithtown, NY Posts: 689 View My Garage	I had the same and it turned out to be the bolts to the exhaust clamp was vibrating against the body at the high idle. I turned the clamp so the bolts were not close to the body. The tune does not alter the idle, however the Ghost Cam at high idlel during cold start will make the car shake more causing more noice from vibration. After the initial cold start idle calms down it goes away.

11-21-2011, 01:17 PM	#6
SC2150 Account Suspended Drives: 2012 Camaro RS, RX supercharged Join Date: Dec 2009 Location: Bradenton, FL Posts: 6,063	Double check oil level. The VVT valvetrain is oil critical.

11-21-2011, 07:40 PM	#10
jeff4946 Drives: 2010 RS 2LT Join Date: Jan 2011 Location: slc, utah Posts: 623 View My Garage	I got a slight rattle. I'm thinking its the internals of the catch can. That's when I got my rattle. __________________ K&N Cai, BSR Ported intake, MBRP catback, BBK long tubes, VMax throttle body, 3.73 SS gears, Zex nitrous 125hp shot, window switch, purge,remote bottle opener, bottle heater, Trifecta tune, Hurst short throw, RX catch can, Intake isolator, Ported Intake manifold

11-21-2011, 07:51 PM	#11
Amarr014 BAD BEE Drives: very fast! Join Date: May 2011 Location: Daytona Posts: 686 View My Garage	mine does this two but i believe its something with the exhaust, its only on cold starts on the initial start up.... i think its some part of the exhaust rubbing against something.. will check it out tomorrow __________________ 2011 V6 LS M6 \| straight piped \| HIDs \| Injen CAI\| 75 Shot NX nitrous\|Trifecta Tune\|RX ported TB,IM and matched heads, Isolator\| RX Catch Can \| AAC Red Halos \| AAC Red interior lighting \| Red bowties \| 15% tint \| Tinted Tails \| SS wheels and tires \| SS tips\| Cat delete\| Arc audio 10's\| ******** box\|Scosche&kenwood\|

11-21-2011, 08:05 PM	#13
Amarr014 BAD BEE Drives: very fast! Join Date: May 2011 Location: Daytona Posts: 686 View My Garage	just over a week ago __________________ 2011 V6 LS M6 \| straight piped \| HIDs \| Injen CAI\| 75 Shot NX nitrous\|Trifecta Tune\|RX ported TB,IM and matched heads, Isolator\| RX Catch Can \| AAC Red Halos \| AAC Red interior lighting \| Red bowties \| 15% tint \| Tinted Tails \| SS wheels and tires \| SS tips\| Cat delete\| Arc audio 10's\| ******** box\|Scosche&kenwood\|

11-21-2011, 08:16 PM	#14
JChen Drives: 2010 SIM 1LT RS Join Date: Aug 2009 Location: Rockford, MI Posts: 313	I got mine less than a week ago. I think CamaroDreams got his very recently as well. I wonder if this is isolated to newer tunes since I haven't heard of this issue with others who have had the Trifecta tune for a longer amount of time. __________________ In: Airaid CAI Out: JBA Shorty Headers, MRT Axle-back Exhaust v1.0 Tuned by Trifecta

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