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
Fox-Body Cobras
Surging/surges/bucks ..
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="93Cobra#2771" data-source="post: 3889390" data-attributes="member: 4599"><p>MOST of the time, bucking is attributed to two things:</p><p></p><p>•Lean condition</p><p>•too much timing</p><p></p><p>Head design, and cam design both affect bucking. My old combo with TFS TW heads, had much less bucking than when I swapped to my GT40Y heads. Bucking got SIGNIFICANTLY worse.</p><p></p><p>The lean condition is often caused by the cam. At low rpms, you have enough overlap that unburnt fuel makes it into the exhaust. The O2's see this fuel, and lean the motor out thinking it is running rich. Reality is that it wasn't running rich, it just isn't as efficient at low rpms/low load. This is referred to by Ed Hohenburg as "cam dieseling".</p><p></p><p>Do me a favor before you replace any more parts. </p><p></p><p>•Unhook battery. </p><p>•Step and hold on brake pedal for 1 minute (clears KAM).</p><p>•Disconnect O2's and go for a drive and see what happens.</p></blockquote><p></p>
[QUOTE="93Cobra#2771, post: 3889390, member: 4599"] MOST of the time, bucking is attributed to two things: •Lean condition •too much timing Head design, and cam design both affect bucking. My old combo with TFS TW heads, had much less bucking than when I swapped to my GT40Y heads. Bucking got SIGNIFICANTLY worse. The lean condition is often caused by the cam. At low rpms, you have enough overlap that unburnt fuel makes it into the exhaust. The O2's see this fuel, and lean the motor out thinking it is running rich. Reality is that it wasn't running rich, it just isn't as efficient at low rpms/low load. This is referred to by Ed Hohenburg as "cam dieseling". Do me a favor before you replace any more parts. •Unhook battery. •Step and hold on brake pedal for 1 minute (clears KAM). •Disconnect O2's and go for a drive and see what happens. [/QUOTE]
Insert quotes…
Verification
Post reply
Forums
Cobra Forums
Fox-Body Cobras
Surging/surges/bucks ..
Top