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
The Terminator
Terminator Talk
Basically Stock '03 Cobra Hesitating on Shifts
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="bubblehead93" data-source="post: 14345644" data-attributes="member: 96609"><p>usually the hesitation becomes an issue after you mod the fuel system, typically a BAP, then the cars actual fuel supply no longer matches what is in the tune... the pcm tries to anticipate fuel demand by load and then has a feedback process based on injector d/p to fine tune it... you let of the gas, fuel pressure spikes, the pcm dials back the fuel pumps, you grab the next gear, nail it, and because the tune is not adjusted properly, you live more on the feedback than on the front end, so pressure drops, car hesitates, before the pumps can spool back up and raise injector d/p again... bunch of stuff out there how to fix it in you tune, anybody who has been tuning these cars should be able to get it right...</p><p></p><p>Unless you had a BAP installed in anticipation of future mods, not sure why you would be having these problems, though there were some issues in the early stock tune, which people quickly fixed, even with the canned tunes... check the trunk, in the spare tire well, or driver's side, behind the panel near the trunk hinge... red box, boost-a-pump, or something similar... if not, need more data about the car....</p></blockquote><p></p>
[QUOTE="bubblehead93, post: 14345644, member: 96609"] usually the hesitation becomes an issue after you mod the fuel system, typically a BAP, then the cars actual fuel supply no longer matches what is in the tune... the pcm tries to anticipate fuel demand by load and then has a feedback process based on injector d/p to fine tune it... you let of the gas, fuel pressure spikes, the pcm dials back the fuel pumps, you grab the next gear, nail it, and because the tune is not adjusted properly, you live more on the feedback than on the front end, so pressure drops, car hesitates, before the pumps can spool back up and raise injector d/p again... bunch of stuff out there how to fix it in you tune, anybody who has been tuning these cars should be able to get it right... Unless you had a BAP installed in anticipation of future mods, not sure why you would be having these problems, though there were some issues in the early stock tune, which people quickly fixed, even with the canned tunes... check the trunk, in the spare tire well, or driver's side, behind the panel near the trunk hinge... red box, boost-a-pump, or something similar... if not, need more data about the car.... [/QUOTE]
Insert quotes…
Verification
Post reply
Forums
Cobra Forums
The Terminator
Terminator Talk
Basically Stock '03 Cobra Hesitating on Shifts
Top