I've never seen a crystal that you could pull 5%.  I've built several VXOs
 (Variable Xtal Oscillators)
over the years and I've found that trying to pull most crystals more than half a
 percent often
results in the creation of a VFO (Variable Frequency Oscillator) with the
 frequency controlled
by the coil and cap.  I'd be very surprised if you could pull a 4.0 MHz crystal
 more than 40KHz
with a trimmer cap.

Is the circuit on one of the quick protoboards, the type where you just plug
 wires in?  These
have very high stray capacitance due to the way they are constructed.  Caps are
 not usually
required when building on one of these, just plug the crystal in and go.

The first thing I'd do is go out and get another crystal.

Wynn Rostek