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Originally Posted by chogunna91
Whats throttle screw settings u mean Iacv screw? uhh not that I know of but Spencer did it once to test out my car and gun it it ran great. Oh yeh thats true about the screw he screwed it in almost all the way in the way it was when i first got the motor. I can actually check timing using my Apexi power fc controller. its at 15 degrees on idle. Yeh my idles is just on there atg 850. So should I retard the ignition a little and adjust my iacv to match up to 850 and compesate for my vac? How will I measure the manifold from brake booster? Thanks alot for the info btw!
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IAC is not what im talking about,although you will have to re adjust it if my suspicion is right.im talking about your throttle plate screw ,if you look closely there is a tiny machined screw and its set at factory. If some one closed it too much it could interfere with correct vacuum redings ,it means the Throttle valve needs to be adjusted slighly to allow small orifice to read vaccum at idle.Open it in small incraments untill you see vacuum rise to 18 ,then you might have to back down IAC, lastly check your TPS settings at idle, you should be able to through your power FC controller.