What parts should i replace no spark on a 1990 Oldsmobile 98?
You shouldn't replace anything until you've checked out the diagnostic codes. Find out what the computer has detected. Then start going through to isolate the problem. If you just replace a bunch of parts, I can almost guarantee that something will get connected wrong then you'll NEVER be able to find the problem.
If a 1999 Mirage will crank but not spark and you replaced many parts so it may be the wiring how do you find out?
To replace the spark plugs on your Celebrity requires a 5/8" spark plug socket, short extension and either a ratchet or breaker bar. First remove the spark plug wire then use the socket to remove the spark plug. The spark plugs should have a .045" gap. Replace the spark plug and reattach the wire. Continue until you have replace all of the spark plugs.
Spark plugs, distributor cap, and distributor rotor should be replaced. Ignition coil should be checked for corrosion at the post. Clean or replace as needed. Spark plug wires should be inspected for corrosion. Clean or replace as needed. PCV valve should be cleaned. Fuel filter should be relaced. Air filter should be inspected and replaced if needed. Oil and filter should be changed if applicable.
You will need a general screwdriver, a spark plug socket, a socket wrench and and extender, a wire brush and a silicone dielectric compound. You should find more of these tools at SEARS or your favorite car parts dealer. You will need a spark plug wrench with an extension to replace the spark plugs in a 1998 Nissan Sentra. You can find an instructional video at www.youtube.com.