The England forward's last strike for Pompey was against Bristol City in the FA Cup in January, but his partnership with David Nugent is beginning to gel following Jermain Defoe's return to Tottenham.
The south coast strugglers welcome Chelsea to Fratton Park on Tuesday night and the pressure is on as they are just two points above the relegation zone after weekend results went against them.
Crouch, who was relegated with Southampton in 2005, said: "I have just got to get the goals to keep us in this league. We have enough to turn it around.
"We have not relaxed - far from it - but there are only so many times you can say we have plenty of games to turn things around.
"I have been in this situation when you think you have time and then all of a sudden you have three games left and you have to win them.
"We do not want to get in that situation. We want to stop it before it gets to that."
Crouch believes he is back to his best form alongside Nugent after previous boss Tony Adams deployed him as a lone frontman.
Crouch added: "We lost Jermain and Lassana Diarra and if you are losing players of that quality it is going to have an effect but I would say that we definitely have the quality here.
"When Jermain was here we knew how we would play, formed an understanding and got a few goals.
"It is better to play with a partner because it shares the workload. To get away from two or even three centre-halves can be hard at times.
"We have got some good players here and now I can play with someone else."