ok started up my 67 camaro with 5.3 and at first it idles highabout 3k then goes down to like 500 so i shut it off. tried again and it idled to about 3k then went steady at around 900 kinda choppy. i figure most of all that is caused by not doing a idle learn. but my real problem is when i hit the gas it cuts out and wants to die until i let off then it goes back to idling. anyone knoow y? im going to get a scanner today any suggestions?

 

Vacumm leak somewhere

 

Would a vacuum leak cause the throttle responce thing. I hit the gas and it almost dies