Problem with a Corvette.

[Stranger]

I've had a '73 Corvette (L44 350 small block) in my garage for the last week. Installed an Edelbrock (2101 Performer) mainfold, Road Demon carb and valve covers. Car was ROCK STOCK before.



Now with the new carb, when you hit the brakes the engine dies, WTF? ?



Lowered the secondary bowl level, even changed the check valve for the brake booster, still dies.



Any siggestions?



TIA

 

[Bill Stockard]

If it ran OK before the manifold change, I would guess you have a vacuum leak either at the maniford to head or manifold to carb. The leak is causing a lean condition and with the extra air from the brake booster when you use the brakes, the fuel air mixture is too lean to support combustion.



Spray WD40 around the maifold and the base of the carb. If the engine speeds up you have a vacuum leak to the outside. If you have a vacuum leak on the underside of the manifold or an internal leak in the base gasket or in the carb, this test won't work.



Make sure you have the proper carb base gasket.



Also made sure you have the vacuum hoses re-connected properly.



Hope this helps... .



Bill

 

[Bad340fish]

After many years of expierience(not in SP lol) with replacing car parts with better ones I have learned this. When you add some new shiny go fast parts the parts in the near area become jealous and therefor FAIL requiring replacement with a new shiny part. I would have to guess the booster took a crap on you. If you unplugg the booster I am sure everything is good right?? It does sound exactly like you have a vacuum leak but if it only dies when you put the brakes on thats where you point your finger. I don't know how exactly to test a power booster though.



If it is bad and a camshaft swap is in your future I would toss the booster in the trash and go manual brakes. Before I added the willwoods on the front of my car removing the power brakes was the best thing I have ever done for stopping power. Keep us posted

Clark