0235SS93

iTrader: (1)

Hey guys! Im having some trouble nailing down the idle in my truck. The motor is a lq4 with 243 heads, nnbs flex fuel intake manifold and injectors, tsp224 cam on a 112 lsa with lt headers. If it set idle speed to 750rpm, the truck drives perfect. However, it just doesnt lope enough or sound right to me there. But, if i try to idle it at 700rpm, i was getting some low speed surging. Well, i got that pretty much nailed down and the engine sounds much better. However, when it's idling in p/n and i rev it up, it tries to stall out as the engine returns to idle and then surges between 400-1000rpm for a few seconds until it steadies out. Sometimes it just completely dies. Any ideas or pointers from you guys to make this thing lope like it should but still drive fine?

sweet-94z28

iTrader: (30)

Lower the Throttle Follower and be sure you have the correct Base Running Airflow.

Bowtie316

iTrader: (1)

Have you used the Russ K idle config to set base airflow. If not, search for it and give it a try. I don't know much about idle tuning but that is where I would start.

0235SS93

iTrader: (1)

Base Running Airflow is dialed in, tried going both ways with the follower decay, even tried a lil more spark at idle to burn off excess fuel. The last option made the biggest impact.