[A26B]

Originally Posted by Jim Stanley

My 1990 was running great until today. Note: The car has 31K miles and I drive it about 1500 per year. When I started it up I could detect a miss. As I drove it the miss became more apparent. All of the gauges read normal and there were no warning lights. At idle it made a helluva racket, especially with the AC on. I stopped at a local shop and the mechanic said I was getting spark to all 8, so probably not a coil. He thought a fuel injector had gone bad. Sounds reasonable I suppose. A couple of questions for you seasoned Z folks:
1) Can a clogged injector be cleaned?
Sometimes but not recommended on 90~92 w/original injectors
2) Do they all have to be replaced? (I am going to try to find out if they were changed by the previous owner).
You should replace all 16 with new.
3) Why would the AC cause more rattle?
Additional load on the engine
4) If not a fuel injector issue, then what are some other probables?
Being a 1990 & spark on all 8, it's 95% likely injectors
5) Would it make sense to check compression and spark plugs?
Plugs; yes, just in case, compression; not something that would fail suddenly.

Thanks for your thoughts and recommendations.

Jerry