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I'm new to this site. I'm a mechanic and i do allot of diagnostics. First your vacuum is too hi should be between 10 and 15 psi at idle. Second I think that you might have a bad fuel pump or maybe you have rust in your tank that your strainer is picking up and clogging. What you need to do is get a fuel pressure reading. At idle the car should have between 30 to 50 psi of fuel pressure. As you accelerate the fuel pressure should rise between 60 and 70 psi. If the fuel pressure drops when you accelerate your fuel pump is bad (weak) or your strainer is clogging up with rust or junk. I've seen weak fuel pumps alot on high performance engines do this.
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