I am tuning a buddies TBSS, just did a 402ci swap into. So far everything seems fine exept that after a rev the rpm takes a couple sec to start droping down to idle. Setup is as follows, LS2 402, trick flow heads, 11.5-1 comp, 232/236 114lsa cam, ported stock 87mm tb. This motor was out of a 07tbss and idle didnt hang in it. Same scaler is being uses between the two, but tps hangs high for a couple secs before dropping. What should i do to adjust this? Still learning Gen4 i am used to Gen3 pcm's. Thanks

 

Anyone? What controls TPS in E67 pcms? No iac or follower/cracker tables like the genIII.

 

48 hits and still nothing? Im curious to know also because my truck does the same thing.

 

what year is your truck?

 

Its either the t-body or your airflow tables are too high. Its very different from the geniii but once you get used to it its easier.

 

Are you refering to final airflow min?

 

its a 2000

 

What airflow and throttle tables did you change from the stock TBSS tune? Also, the effective throttle area for idle may have been altered depending on how close the porting got to the center of the throttle bore.

 

http://www.tbssowners.com/forums/showthread.php?t=17957