I have an 86 with 2 annoying problems. The first is that there is a vibration in any gear at 1500-2300 rpm under light to medium loads. The vibration goes away when cruising or heavy acceleration. I've had the u-joints replaced drive shaft balanced( was ok) and replaced u-joints on half shafts but to no avail. Last year I cracked the flex plate and changed it over the winter. Which leads to the second problem. It now has onlt 13-14" vacuum. I've sprayed carb cleaner and starting fluid all around the intake looking for a leak, with no change in idle. The car will sit at 14 and then drop to 6-7" (600 rpm) for a secon and then back to 14. I've adjusted the valves, retarded timing, adn tightened every bolt on the TPI system I can find.But I'm at a loss now on what to do.Should I take it all apart and start over or is there something else I can try? A friend has said that the computer will take over ny abnormalities in idle, and that it sounds like the idle air control motor is acting up. Any ideas on these 2 problems?
- posted
18 years ago