mis fire would be my guess. the engine will shake and vibrate? its called a dead miss, where a cyl is "dead" if you smell gas, its not running rich. its not burning the fuel, its misfiring (which turns on the check engine light) could be ignition (spark to ignite fuel, not key ignition) problem, or low compression in cyl.
if you can get spark in every cyl (check at spark plug, not at rotor) then try to get a compression test done in each cyl
No, the engine exhaust is what comes out of the tailpipe.
need to check your evap system or you have a blown head
if the noise comes from the front end while you rev the engine, and not alot of sound comes from the tailpipe, check the exhaust from the front back for cracks or breaks. it sounds like an exhaust leak to me.
why do check engine light comes on
Where is the smoke coming from? If it's the engine you may have bad valve covers or something is burning up from under the hood. Check the source and check it fast. If it comes from the tailpipe you may have a catalytic converter problem.
No, the check engine light comes on when the computer detects a malfunction and sets a code.No, the check engine light comes on when the computer detects a malfunction and sets a code.
The check engine light comes on at start up for a bulb check. If it stays on with the engine running the computer has detected a malfunction. You need to have it checked for codes.
Check the engine oil, sometimes when the oil is low the check engine light comes on while sitting still and goes out when you accelarate.
Maybe, the check engine light comes on when the computer detects a malfunction and sets a code.Maybe, the check engine light comes on when the computer detects a malfunction and sets a code.
You can buy the check engine computer and the book comes with it. I know, I bought one. When your check engine light comes on, you plug it in and check the engine and it will give you the code and you look in the book for that code and it gives you the answer.
I had all sensors replaced in my 03 Trailblazer and the check engine light stiil comes on. Why?
A low battery can cause the electrical system to flash check engine lights