You have a decay
rate with the IAC (idle air control) that when you close the throttle is brings the rpm down at a certain rate until you reach idle. For some reason mine was acting like it was at idle as soon as the throttle was closed causing it to not want to idle pulling up to a stop sign. He slowed down how fast the IAC was closing.
This is a stock cube LS1. 347 ci. It has forged diamond pistons, h beam rods. A set of TEA 5.3 stage 1.5 heads that have been milled to yeild a 11.3 compression ration. Cam is a comp XER grind 230-230 on a 110 lsa with .597 lift. FAST 90mm with Nick Williams 90mm tb.
I orginally built the motor to run nitrous, but sold the system to a friend. I may have to buy it back.
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