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My 67 Firebird is starting to bog down from a stop. Also at the beginning of every gear during exceleration. I have checked for:
A Vacuum leak,
plugs and wiring
Intake manifold seating
For my ignition I'm using the MSD Atomic system. On it's handheld device it shows no errors in the system.
Ok I'm going to assume fuel pressure has been measured at the rail & is good. That to me screams vacuum leak. If the computer is not detecting a misfire then its your fuel or vacuum. I would smoke the engine and/or leak-down test the cylinders. Good luck I want you to do burn outs too
Smoke test done, fuel pressure 57psi. It's also overheating a bit at 212F (water boiling point) but that may stand to reason since the ambient temperatures here are about 105° But I would like your opinion on the temperature. And yes the thermostat was checked, opened at 185 and both fans on. Could you please explain how to do a leak test the cylinders?
06-24-2016, 03:43 PM
67 firebird LS1 Boggs at starting line 
