2010 SS - Bucking, runs like crap at WOT - Camaro5 Chevy Camaro Forum / Camaro ZL1, SS and V6 Forums

pr1mu5 · 07-20-2015, 12:51 PM

Hi all,

Second owner of a 2010 SS, Manual Shift. ~50k on the odometer.

Car has been great for the past year I've owned it, took it to the track last month and really had a blast taking the car out through the twists and turns of the local roadcourse.

About three weeks after that road course event, I'm noticing that the car is misfiring, or bucking, running rough. It seems like it only does this when it is warmed up, and only when under heavy throttle.

It's so bad it feels like you're riding a bull. Bucking forwards and backwards in my seat, and downshifting/upshifting doesn't help. Gentle gas pedal sometimes helps, or flooring it also sometimes clears the issue, for a little while (maybe for 30 seconds), but it will return.

Here's the kicker: NO CODES. Nothing. The idiot computer thinks everything is fine. I can't believe it's not throwing a code.

Cleaned out the K&N filter / intake, really the only modification to the car, to no avail.

Thoughts?

williamp78 · 07-20-2015, 12:54 PM

sounds like a sensor is giving you problems when i closed loop, have it scanned.

pr1mu5 · 07-20-2015, 12:58 PM

OK, thanks... to be clear, my little orange Actron OBDII scanner won't pick that up? (When I used it, it says everything is fine).

hworth18 · 07-20-2015, 01:07 PM

Check for vacuum leaks, especially where the intake tube is mounted to the throttlebody and clean the maf sensor. The clamps on aftermarket intakes are known to loosen after a while, make sure all the connections are tight.

Spec · 07-20-2015, 01:09 PM

TB? Without a Code, hard to decipher without actually being in front of your car.

WoodBoss · 07-20-2015, 01:14 PM

Sounds like it could be wire but without a scanner picking up a code you are just shooting in the dark.

pr1mu5 · 07-20-2015, 01:16 PM

Quote:

Originally Posted by Spec

TB? Without a Code, hard to decipher without actually being in front of your car.

That's whats killing me. Non recreatable in my driveway, and computer isn't throwing a code.

I did read an article about 'weak' and 'strong' MAF, I'll have to check that out...

Jasper · 07-20-2015, 03:17 PM

Since there is no code to go on and we're all just shooting in the dark at the moment, I'm gonna suggest the MAF is cooked. I cooked mine on the Grand Prix because eventually it got a coating of oil from the K&N which killed it. They will tell you that you over oiled it but I didn't. You can try to clean it with some throttle body cleaner and maybe it'll still be good. Otherwise, I'd move into the sparkplug/wire realm but that should cause a misfire and code.. I too am very surprised the check engine light isn't on.

J

07-20-2015, 12:51 PM	#1
pr1mu5 Drives: 2010 SS Join Date: Jul 2014 Location: United States Posts: 3	2010 SS - Bucking, runs like crap at WOT Hi all, Second owner of a 2010 SS, Manual Shift. ~50k on the odometer. Car has been great for the past year I've owned it, took it to the track last month and really had a blast taking the car out through the twists and turns of the local roadcourse. About three weeks after that road course event, I'm noticing that the car is misfiring, or bucking, running rough. It seems like it only does this when it is warmed up, and only when under heavy throttle. It's so bad it feels like you're riding a bull. Bucking forwards and backwards in my seat, and downshifting/upshifting doesn't help. Gentle gas pedal sometimes helps, or flooring it also sometimes clears the issue, for a little while (maybe for 30 seconds), but it will return. Here's the kicker: NO CODES. Nothing. The idiot computer thinks everything is fine. I can't believe it's not throwing a code. Cleaned out the K&N filter / intake, really the only modification to the car, to no avail. Thoughts?

07-20-2015, 12:54 PM	#2
williamp78 Drives: 2011 2ss blk/wht strp Join Date: Oct 2014 Location: south of houston Posts: 446	sounds like a sensor is giving you problems when i closed loop, have it scanned. __________________ 2011 2ss black/wht stripes "CAM only" https://www.instagram.com/w_j_p_boss/?hl=en

07-20-2015, 01:07 PM	#4
hworth18 Jus' Cruzin Drives: 2017 Camaro 1SS Krypton Green Join Date: Oct 2012 Location: Northeast Oklahoma Posts: 1,107 View My Garage	Check for vacuum leaks, especially where the intake tube is mounted to the throttlebody and clean the maf sensor. The clamps on aftermarket intakes are known to loosen after a while, make sure all the connections are tight. __________________ “The moment you think you know what’s going on in a women’s head, is the moment your goose is well and truly cooked” -Howard Stark

07-20-2015, 12:58 PM	#3
pr1mu5 Drives: 2010 SS Join Date: Jul 2014 Location: United States Posts: 3	OK, thanks... to be clear, my little orange Actron OBDII scanner won't pick that up? (When I used it, it says everything is fine).

07-20-2015, 01:09 PM	#5
Spec Account Suspended Drives: 2010 Camaro 1SS LS3 Join Date: Jan 2015 Location: Riverside, CA Posts: 4,018	TB? Without a Code, hard to decipher without actually being in front of your car.

07-20-2015, 01:14 PM	#6
WoodBoss "Old School" Drives: 2010 2SS L99 Join Date: Apr 2015 Location: Sherrills Ford, NC Posts: 1,294	Sounds like it could be wire but without a scanner picking up a code you are just shooting in the dark.

07-20-2015, 03:17 PM	#8
Jasper Drives: 2011 Summit White Camaro SS (LS3) Join Date: Sep 2014 Location: Welland, Ontario Canada Posts: 547	Since there is no code to go on and we're all just shooting in the dark at the moment, I'm gonna suggest the MAF is cooked. I cooked mine on the Grand Prix because eventually it got a coating of oil from the K&N which killed it. They will tell you that you over oiled it but I didn't. You can try to clean it with some throttle body cleaner and maybe it'll still be good. Otherwise, I'd move into the sparkplug/wire realm but that should cause a misfire and code.. I too am very surprised the check engine light isn't on. J