Quote:
Originally Posted by DRJDVM's '69
Big problems now....****..
Did the vaccum guage and it peaked around 1-1.5 turns out.... car seems to run better too..... did it a couple of times and messed with the idle.
Took the car out for a ride and it seemed to run better. Went on the freeway, got on it alittle to pass someone, then started to cruise at about 70 MPH and 2000 RPMs in 5th gear....went about 3/4 mile just cruising and ....bamm, some black smoke.... car just started to die and I had to pull over on the side of the freeway.... car cranks but no oil pressure....WTF....
called AAA and the car is home....
WTF did I do ??? How could I have broken something cruising at 70 MPH..... I did get on it alittle before but it seemed fine and nothing went wrong for almost a mile..... the motor is all forged, Dart block etc etc, so....
Could I have leaned it out too much and got into detonation ??
Not good....
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I doubt it, at least as far as doing damage. You'd have plenty of warning; pinging sound, etc. and even then you'd have to do a lot of it before breaking a ring or piston. You'd still have oil pressure.
Black smoke is usually super rich a/f, like a float stuck, dirt in the needle and seat, etc. I'd pull the air cleaner off and first check if gas is pouring down the carb when you turn the pump on (if electric; if manual you'd have to crank the engine over). Also, what is your fuel pressure? If it's too high, or right at the limit it will cause numerous flooding issues, erratic idle, etc. Also, do you have access to another oil pressure gauge? Is this one electric or manual? If electric, make sure the wire is still connected, didn't burn on the headers, etc. I always start on oil pressure issues with trying another gauge, and the vast majority of the time the gauge or sender is bad, and there is no real oil pressure issue.
Jody