2000 Chevy z71 and check engine light is on and when its cold in the mornin it will surge real bad until it warms up light comes and goes off once in a while whats the problem?
The problem is, you haven't used a code scanner yet. The code scanner will tell you the rest of the story. Borrow, rent or buy an OBD2 code scanner at your local auto parts retailer. Many auto parts retailers will even help you use it and figure out what it all means.
The check engine light comes on and stays on when a problem is detected by the self diagnosis system of your vehicle. Generally, a check engine light is lit when there is a problem in the emissions or somthing that is affecting the effectiveness of the emissions. If the check engine light is flashing a misfire has been detected
The idle is not adjustable. You have other problems if it's idling to fast are to slow. The throttle plates are calibrated / preset at the factory. Is the check engine light on ?? If it is, then you need to have the engine scanned with a engine scanner to check the emission system and sensors. It will also help your idling problem after you repair the problem that made the check engine light come…