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I replaced the upper intake plenum on my '01 - 4.6L. The install went smooth no real issues. However when I went to test it out I had a real problem; I can start the engine no problem, she idles fine but when I push the peddle she dies. Like it's getting no gas. Restart, great idle, but dies as...

I own a 2001 Mustang GT, no heavy mods just the standard; CAI, 70mm TB, aftermarket plenum, Accel coil packs, and flowmaster cat-back exhaust. I have heard that the stock 19# EV1 style fuel injectors are pretty much maxed out on even a bone stock 4.6. However if I go with 24# EV6 style...