Most auto part stores can scan and determine problem
To answer your question I need to know the year model of your Chevy Celebrity as well as the engine that it has in it.1996 chevy calavlier 2.2
No Chevy Celebrity ever had a 4.0L engine
That sounds like a problem within the engine control module or possibly the wiring,
Check
No.
Does your 1986 Chevy Celebrity have the 2.5L 4 cylinder engine or the 2.8L V6?
The idle speed on a 1987 Chevy Celebrity is controlled by the engine computer, there is no way provided to adjust it.
The timing on y our 1987 Chevy Celebrity is controlled by the engine computer, there is no way provided to adjust it.
Which engine does your 1982 Chevy Celebrity have? Is it the 2.5L 4 cylinder or the 2.8L V6? They are very different.
Depends on what engine it has
On a 1989 Chevy Celebrity the timing is controlled by the engine control module, there is no specification or provision for adjusting the timing manually.
The spark plug gap for your 1989 Chevy Celebrity 2.8 V6 is .045".