Re: Cause of vacuum flutter at idle?
I forgot to mention that the car had rarely been started in the last 3 years.
Anyway, I changed the oil which had few miles put still managed to look black and nasty. As soon as I started it up, surprisingly it sounded better. I hooked up the vacuum gauge and to my surprise there is now next to no flutter.
After a quick spin around the block, it feels like it had more power too. It still needs to be tuned with the wideband, but I think my problem is largely resolved.
Could the crappy oil have prevented a lifter from pumping up?
Or was a spring or valve bound up from all of the sitting?
What do you guys think?
Thanks for your help.
1973 Cougar XR-7 convertible - 351C, 9:1 CR, 2V heads, Crower Ultra Beast, Weiand X–CELerator, 600CFM Edelbrock Performer, Dynamax long tubes, stock FMX, 3.89s w/ Detroit Locker