1999 Pontiac Firebird "check engine light" Questions

check engine light coming on when traveling and constant highway speeds, the check engine light comes on and stays on until slowing to lower speeds or stopping and restarting the car. valve body issue

check engine light comes on, when i start it back up and drive the check engine light disapears. It is also getting hot while stopped. SOUND LIKE FAULTY IDLE SPEED CONTROL OR FAULTY FUEL INJECTOR OR A

...the problem with the car parked. Could be the pump or relay or other component. And if the check engine light stays on while the engine is running I would also check the computer for trouble

...check engine light comes on and flashes I replaced the gas cap it never built up back pressure so I thought it might be why reason it was running so bad .but after putting the cap on and putting the ...

check engine light on 2000 Firebird stays on. OK, let me explain something, THAT LIGHT IS NOT A DECORATION, it comes on when something on your engine has failed, take it in and get a mechanic to read ...

...is the code. I don't know how to check. Stupid check engine light. bank 1 tell you there is a missfire on the right bank of the engine. check all the spark plugs and wirs , then the ignition

...Some say this may increase the engine noise and also the check engine light will stay illuminated? yes more noise, engine light on, and poor fuel economy, not a good idea to remove or bypass

...check engine light comes on. Save yourself some money and go to a local parts store to use a scanner. Most parts stores will hook up to your car for free and tell you the codes that are being logged. ...

...engine check engine light on transmission works fine when check engine light goes out does not shift right.Sometimes give gas quick dies will not start back until cools off starts right up If you ...

ENGINE POWER RESERVE LIGHT COMES ON IN DASH THEN ENGINE HAS NO POWER. MUST TURN CAR OFF THEN RESTART THEN LIGHT GOES OFF is the check engine light on?