I've just done my 305 to 350 conversion, (and a 700r4 to t-5) (90 marow RS). After a ton of headache I got pretty much everything dealt with except now my idle when warmed up is crap. It just will not stay running, I didn't know if my set up: throttle body to trans-dapt spacer to adapter plate to edelbrock performer could be the problem.....? Any advice, I read the thread talking about "tbichips". Thats what I'm running.... problem diagnosed?

thanx

Jay and RIP

 

You changed the computer and the TBI? What kind of 350 do you have, a LO5?

 

I have the origional 746 computer with the "tbichip". The motor is first gen 350 I beleive, (has the two peice rear main seal"

 

oh, and the tbi is off the origional 305 but has injectors for a truck 350, (84 suburban)

 

The speed density system of the TBI is calibrated to a LO5 350, not whatever 350 you happen to have. That's why it's not running worth ***. You probably need a tune.

 

computer tune?

 

Yes, as in the computer needs to be calibrated to your particular setup.

 

thanks buddy, I'll giver a shot.