navCtrl.push Não está incluindo minha pagina a pila

app.module.ts

import { NgModule, ErrorHandler } from '@angular/core';
import { BrowserModule } from '@angular/platform-browser';
import { IonicApp, IonicModule, IonicErrorHandler } from 'ionic-angular';
import { MyApp } from './app.component';

import { AboutPage } from '../pages/about/about';
import { ContactPage } from '../pages/contact/contact';
import { HomePage } from '../pages/home/home';
import { TabsPage } from '../pages/tabs/tabs';

import { StatusBar } from '@ionic-native/status-bar';
import { SplashScreen } from '@ionic-native/splash-screen';
import { Http } from '@angular/http';
import { HttpModule } from '@angular/http';

import 'rxjs/add/operator/map';
import 'rxjs/add/operator/toPromise';
import { EscolhaPage } from '../pages/escolha/escolha';


@NgModule({
  declarations: [
    MyApp,
    EscolhaPage,
    AboutPage,
    ContactPage,
    HomePage,
    TabsPage

  ],
  imports: [
    BrowserModule,
    HttpModule,
    IonicModule.forRoot(MyApp)
  ],
  bootstrap: [IonicApp],
  entryComponents: [
    MyApp,
    EscolhaPage,
    AboutPage,
    ContactPage,
    HomePage,
    TabsPage
  ],
  providers: [
    StatusBar,
    SplashScreen,
    {provide: ErrorHandler, useClass: IonicErrorHandler}
  ]
})
export class AppModule {}

home.ts

import { Component, OnInit } from '@angular/core';
import { NavController, LoadingController, AlertController } from 'ionic-angular';
import { Http } from '@angular/http';
import { HttpClientModule } from '@angular/common/http';
import { EscolhaPage } from '../escolha/escolha';

@Component({
  selector: 'page-home',
  templateUrl: 'home.html'
})
export class HomePage implements OnInit {

  public carros;

  constructor(
    public navCtrl: NavController, 
    private _http: Http,
    private _loadingCtrl: LoadingController,
    private _alertCtrl: AlertController) {}

  ngOnInit() {

      let loader = this._loadingCtrl.create({
        content: 'Buscando novos carros. Aguarde ...'
      });

      loader.present();

      this._http
        .get('https://aluracar.herokuapp.com/')
        .map(res => res.json())
        .toPromise()
        .then(carros => {
          this.carros = carros;
          loader.dismiss();
        })
        .catch(err => {
          console.log(err);
          loader.dismiss();
          this._alertCtrl
            .create({
              title: 'Falha na conexão',
              buttons: [{ text: 'Estou ciente!'}],
              subTitle: 'Não foi possível obter a lista de carros. Tente mais tarde.'
            }).present();
        });
  }

 seleciona(carro) {
   console.log(carro.nome);
    // adiciona pagina a pilha
    this.navCtrl.push(EscolhaPage, { carroSelecionado: carro });
  }
};

escolha.ts

import { Component } from '@angular/core';
import { NavController } from 'ionic-angular';
import { NavParams } from 'ionic-angular';

@Component({
  selector: 'page-escolha',
  templateUrl: 'escolha.html'
})
export class EscolhaPage {

  public carro;

  constructor(public navController: NavController, public navParams: NavParams) {


  }

}

escolha.html
<!-- src/pages/escolha/escolha.html -->
<ion-header>
  <ion-navbar>
    <ion-title>
      Sua escolha
    </ion-title>
  </ion-navbar>
</ion-header>

<ion-content padding>

</ion-content>