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My son and I recently started an El Camino project. It's a 1984 Conquista with the 305 and auto.
It's got some issues that make me think there is a massive vacuum leak somewhere and would appreciate some pointers on particular places to look.
Here's the issues:
1) At highway speed, giving it much more throttle results in predetonation noise. It seems like the timing on the motor is not changing correctly. Is the distributor vacuum controlled on a 1984 305?
2) The transmission does not kick down when you give it gas like above. Again - is this vacuum controlled?
3) The cruise control is inoperative. I know vacuum can cause problems for this.
4) The AC/heat vents only blow out of the floor and will not change to blow from the dash. Again - I know the vents are changed by vacuum actuators.
Any thoughts on where to begin looking? It seems like there must be a huge leak somewhere but I'm not hearing any typical vacuum noises.
It's got some issues that make me think there is a massive vacuum leak somewhere and would appreciate some pointers on particular places to look.
Here's the issues:
1) At highway speed, giving it much more throttle results in predetonation noise. It seems like the timing on the motor is not changing correctly. Is the distributor vacuum controlled on a 1984 305?
2) The transmission does not kick down when you give it gas like above. Again - is this vacuum controlled?
3) The cruise control is inoperative. I know vacuum can cause problems for this.
4) The AC/heat vents only blow out of the floor and will not change to blow from the dash. Again - I know the vents are changed by vacuum actuators.
Any thoughts on where to begin looking? It seems like there must be a huge leak somewhere but I'm not hearing any typical vacuum noises.