high rpm and engine surge 5.0

[sevi]

Having dealt with carbs I was unprepared for the higher idle of an EFI engine with performance modifications. The car in drive idles at 800 rpm. Can this be lowered to 600 or is it necessary to swap out the cam for something milder. If so, any recommendatons?

Engine surge. when cruising and taking my foot off the throttle it feels like the engine surges slightly back and foth. Any ideas?

1989 mustang with Trick Flow heads, TF street intake, 10:1 TF pistons, TF stage 1 cam (499/510 221/225, lobe seperation 112) 73 mass air body, 65 TB, 24# injectors, headers

 

[88mouse]

what size toque converter you have in it?

 

[sevi]

high rpm engine surge

stock torque converter

 

[jrichker]

See "Help me create the Surging Idle Checklist" at http://forums.stangnet.com/showthread.php?t=698148
for help with your idle problems. The first two posts contain all the updates to the fixes. I continue to update it as more people post fixes or ask questions.

 

[88mouse]

cam is to big for stock converter