Home
What's new
Latest activity
Authors
Store
Latest reviews
Search products
Forums
New posts
Search forums
What's new
New posts
New listings
New products
New profile posts
Latest activity
Members
Current visitors
New profile posts
Search profile posts
Log in
Register
Cart
Cart
Loading…
What's new
Search
Search
Search titles only
By:
New posts
Search forums
Search titles only
By:
Menu
Log in
Register
Navigation
Install the app
Install
More options
Change style
Contact us
Close Menu
Forums
Cobra Forums
2013-14 Shelby GT500
Need some opinions on WOT noise
JavaScript is disabled. For a better experience, please enable JavaScript in your browser before proceeding.
You are using an out of date browser. It may not display this or other websites correctly.
You should upgrade or use an
alternative browser
.
Reply to thread
Message
<blockquote data-quote="merkyworks" data-source="post: 15873106" data-attributes="member: 179203"><p>Maybe the gas you have is bad and not 91 octane. I would run through your current tank and then fill up at a name brand gas station (Shell or Chevron) and see if you still does this. </p><p></p><p>Assuming this is in fact detonation/knock.</p><p>Your car has knock sensors and runs closed loop all the time (even at WOT), so in theory the PCM would keep pulling timing until the knock sensors stop happy. The car might feel like a turd on the hit but the PCM is trying save the motor. The fact the detonation/knock is so bad the PCM can't stop it is really bad and leads me to believe is something big like bad fuel, clogged cat, bad O2 sensor ect. </p><p></p><p>If it's detonation the more load you put on the engine the worse it gets, 1st-2nd may not do it cause the load is lower but if its detonates in 3rd then you can bet its going to detonate in 4th. </p><p></p><p>Do you know for a fact the car is 100% stock, maybe someone modded it and then returned it back to stock but messed up on re-flashing the PCM back to stock.</p></blockquote><p></p>
[QUOTE="merkyworks, post: 15873106, member: 179203"] Maybe the gas you have is bad and not 91 octane. I would run through your current tank and then fill up at a name brand gas station (Shell or Chevron) and see if you still does this. Assuming this is in fact detonation/knock. Your car has knock sensors and runs closed loop all the time (even at WOT), so in theory the PCM would keep pulling timing until the knock sensors stop happy. The car might feel like a turd on the hit but the PCM is trying save the motor. The fact the detonation/knock is so bad the PCM can't stop it is really bad and leads me to believe is something big like bad fuel, clogged cat, bad O2 sensor ect. If it's detonation the more load you put on the engine the worse it gets, 1st-2nd may not do it cause the load is lower but if its detonates in 3rd then you can bet its going to detonate in 4th. Do you know for a fact the car is 100% stock, maybe someone modded it and then returned it back to stock but messed up on re-flashing the PCM back to stock. [/QUOTE]
Insert quotes…
Verification
Post reply
Forums
Cobra Forums
2013-14 Shelby GT500
Need some opinions on WOT noise
Top