Help us help you. By posting the year, make, model and engine near the beginning of your help request, followed by the symptoms (no start, high idle, misfire etc.) Along with any prevalent Diagnostic Trouble Codes, aka DTCs, other forum members will be able to help you get to a solution more quickly and easily!
Hi Karim,
I moved this to the repair questions section where I think you'll get more help.
If you can provide us with the engine size and country of origin, I'm sure someone will be glad to assist you