I'm looking for tips on my 84 buick regal service engine light before I have it smogged?

Question

Service engine light came on. I tried disconnecting the battery for 5 minutes and it still is on

Answer 1

Take the car to auto-zone. Thy can run the code for you and it is free.
You will have to understand what he is telling you to get it fixed.
It could be something as sample as low coolent lever, or something like an o2 senser.
But atleast thy will be able to tell you what it is.

Answer 2

84 Buick, WHAT? What engine size, and manual or auto transmission?
You CAN check the computer for codes yourself. There is an ALDL connector under the dashboard, usually just to the right of the steering wheel. Most parts stores have an ALDL "key" that fits into the A-B position on the connector. 1.) With the ignition off, put the diagnostic key into the connector. 2.) Turn the ignition to the "on" position, but not "start". 3.) Watch the light, and count the flashes... one/one two, (Code 12) displayed 3 times, means the computer is on-line, and ready to display codes.4.) After the code 12, count the flashes to display additional codes. Like, three flashes, followed by two flashes, is a Code 32. It will display any codes 3 times, and then go to the next code. When it is done, it will display Code 12 again, and then keep repeating the codes until you remove the code key. If it is a "Hard Fault" disconnecting the battery will not remove the code, and you will need to find out what the code indicates is wrong. Your parts store should have a code list for your model vehicle and year. BUT! Sometimes, a code can indicate a sensor that is NOT bad, but is being affected by another unrelated component. If you are in doubt, take it to a shop that you trust for a full computer diagnostic. Make sure the technician(s) is(are) ASE certified.
The general condition of your car, and the milage have a great deal to do with how it performs. The computer diagnostics in your car, are based on your car being in properly maintained condition. If it's a piece of junk, the computer has no choice but to "read it and weep"... ( I have an '82 Buick, so I'm familiar with the beast!)

Answer 3

Depending on your states requirements, you may not have to worry about it. I live in PA and you only have to worry about the check engine light being on when you get it checked if your car has OBD II diagnostics. Trust me, your 84 Regal doesn't have it

Call a local service center and they should be able to tell you about your states' regulations