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
Engine/Tuning
Odd idle issues, ISC duty cycle
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="xtreme_exploder" data-source="post: 16333108" data-attributes="member: 153138"><p>I have an idle problem that is very difficult for me to figure out. Car is an '03 Cobra with a Whipple Crusher, 80lb injectors/return system, and ported heads w/ Comp "stage 2" blower cams. I have the idle set at 750 rpm, and I'm assuming that isn't too low. While the car is idling, it has a weird issue where the idle will drop to around 600 rpm every 20 seconds or so. My data logs show the ISC duty cycle instantly dropping by at least 10% when that happens. Then it'll slowly pick itself back up, before doing the same thing. I've tried adjusting the throttle blade position with the IAC and TPS unplugged, only seems to make it worse. I can't ever get the duty cycle to the 30% or so that everyone says is ideal. My integrator will slowly wander up and down, which i don't understand. The car often has trouble starting or will stall after firing up. Also, the spark source is always at minimum clip while idling, not sure why that is. My datalog is linked.</p><p>[MEDIA=googledrive]1gupTXngJlB_EOKjuLYJdFm-6VmwWhDL3[/MEDIA]</p></blockquote><p></p>
[QUOTE="xtreme_exploder, post: 16333108, member: 153138"] I have an idle problem that is very difficult for me to figure out. Car is an '03 Cobra with a Whipple Crusher, 80lb injectors/return system, and ported heads w/ Comp "stage 2" blower cams. I have the idle set at 750 rpm, and I'm assuming that isn't too low. While the car is idling, it has a weird issue where the idle will drop to around 600 rpm every 20 seconds or so. My data logs show the ISC duty cycle instantly dropping by at least 10% when that happens. Then it'll slowly pick itself back up, before doing the same thing. I've tried adjusting the throttle blade position with the IAC and TPS unplugged, only seems to make it worse. I can't ever get the duty cycle to the 30% or so that everyone says is ideal. My integrator will slowly wander up and down, which i don't understand. The car often has trouble starting or will stall after firing up. Also, the spark source is always at minimum clip while idling, not sure why that is. My datalog is linked. [MEDIA=googledrive]1gupTXngJlB_EOKjuLYJdFm-6VmwWhDL3[/MEDIA] [/QUOTE]
Insert quotes…
Verification
Post reply
Forums
Cobra Forums
The Terminator
Engine/Tuning
Odd idle issues, ISC duty cycle
Top