That is the problem with the elephant gambit: you are a central pawn down for no real compensation.
Elephant Gambit, Queen's Pawn Countergambit or Englund Counterattack
The Englund 1.d4 e5 is also basically a one-trick pony. Setting a trap after 1. d4 e5 2. dxe5 Nc6 3. Nf3 Qe7 4. Bf4 Qb4+ 5. Bd2 Qxb2, where beginners often fall for 6.Bc3? Bb4! and lose. Once they learn that 6.Nc3 is the correct move, the Englund is basically refuted as White is leading in development.

The Englund 1.d4 e5 is also basically a one-trick pony. Setting a trap after 1. d4 e5 2. dxe5 Nc6 3. Nf3 Qe7 4. Bf4 Qb4+ 5. Bd2 Qxb2, where beginners often fall for 6.Bc3? Bb4! and lose. Once they learn that 6.Nc3 is the correct move, the Englund is basically refuted as White is leading in development.
In Englund also, if white plays f4, then what? Similar to elephant's gambit. The pawn is saved!
In the opening 1.e4 e5 2.Nf3 d5 3.e*d5 Bd6 If white plays c4 and saves his pawn, what should black do?? I have searched a lot, but this line is nowhere in the theory. I have played one match of Queen's Pawn Countergambit and lost because my opponent saved his pawn through c4! Please tell me!!