idle issue

[eclipse93gst]

well my 1g is idling funny but only when i come to a stop it fluctuates between 1-2000 rpm for a few seconds and then idles fine at 900rpm and all this started after i put a new ecm in

 

[dented_coffee]

Sounds like your ISC is going bad. My 94 Talon was doing that a long time ago. I tested my ISC and turns out I had a dead coil in the ISC.

DmTaLoN's Idle Speed Control Test/Fix Page!

I hope this helps you out and keep us updated on what your results are.

 

[brownfinger]

You might try performing the basic TPS, BISS, and timing adjustments before shelling-out any money. Plus, the new ecu will take a few miles to learn all the individual settings to match your adjustments.

Base Timing Adjustment

1G BISS Adjustment

TPS Adjustment

You need to do it in the right order: Get idle to 750, set timing, re-check idle, set TPS, set BISS. Then be patient. The ecu needs a little time to realize things have changed.

 

[eclipse93gst]

thanks guys for the help i will be checking into all this info you have giving me appreciate it

 

[i love boost]

if non of that works, check your grounds.

 

[SlickPyro]

I would go through the idle relearn procedure. I swapped ecus recently and it surged a bit. I have a rebuilt throttle body and a new isc, so I knew it wasnt that. So when I swapped in the new ecu and it had idle problems I went thru the idle relearn procedure and it idles just fine now right where it needs to be! Hope you figure it out!