Mathf.Clamp issues...resctricting car movement

Code (CSharp):

1. using System.Collections;
2. using System.Collections.Generic;
3. using UnityEngine;
4.  
5. public class carController : MonoBehaviour {
6.  
7.     public float carSpeed;
8.     public float maxPos = -633.3f;
9.     Vector3 position;
10.  
11.     // Use this for initialization
12.     void Start () {
13.         position = transform.position;
14.  
15.        
16.     }
17.    
18.     // Update is called once per frame
19.     void Update () {
20.         position.x += Input.GetAxis("Horizontal") * carSpeed * Time.deltaTime;
21.         position.x = Mathf.Clamp(position.x , -342.6f , -633.3f);
22.  
23.  
24.  
25.    
26.  
27.         transform.position = position;
28.  
29.        
30.     }
31. }
32.  

So what am i doing wrong here? The car shifts left entirely when i use this...I am no coder i just came up with it following tutorials. Its a script for restricting the car in frame when tapped.
Thank you for any help!

 

-633.3 is less then -342.6 so you need to switch them in this line of code:

Mathf.Clamp(position.x , -342.6f , -633.3f);

 

I tried that too...but with no help, even that gives erratic results!