Throttle body heater delete (Page 5/5) Yellow-88 SEP 08, 09:19 AM Here's one for the hard core nerds. Basically what it says is that pressure change in a gas is related to movement of heat. It explains why venting a high pressure pneumatic cylinder to ambient gets cold and probably why engineers took no chances with our little throttle bodies. I'll loose the tubes and void the warrantee. What was the warrantee on a Fiero anyway? https://ls1tech.com/forums/...intake-air-temp.html ron768 SEP 09, 03:01 PM quote Originally posted by Yellow-88: Why would you have an EGR with no vacuum line? Yeah, you do need a cold start injector. I think you mentioned once that you have to crank a long time to get started. Could that be the problem? If you do 7730, you loose the cold start injector.