I recently got a '65 Mustang with either a 289 with 302 headers or with an actual 302 (not entirely sure yet). It has an Edelbrock 4 barrel carb with blockage keeping it from running 100%. It will run fine at high speeds but very poorly at low speeds.

I purchased some Seafoam and put it in my gas tank per the instructions. Filled up with Premium gas. Drove her home. Tried to crank her, but the battery was dead. I got it tested to be sure, and then I put a new battery on. Now the car will not start at all. It almost starts every time and all the lights work, so it's not the battery. It doesn't sound like it's struggling to turn over, but it just won't crank up. Could the Seafoam have done this at all?

I tried putting a little Seafoam into the carb after she wouldn't start, but she's still not cranking up.


Any suggestions?

 

get a holley

 

That's exactly what the mechanic said. I was hoping to work with the Edelbrock to save money though.