If your 1999 XJ8 idles but won't accelerate, start by checking for issues with the throttle body or accelerator pedal position sensor, as these can affect acceleration. Additionally, inspect the air intake system for blockages or leaks, and ensure the fuel system is functioning properly, including the fuel pump and fuel filter. It’s also a good idea to scan for any diagnostic trouble codes (DTCs) that may indicate specific problems. Lastly, consider checking the Transmission Fluid level and condition, as transmission issues can also cause acceleration problems.
Vacuum leak in a/c door control system . Look for vacuum leak under the hood.
Listen and look for a vacuum leak. Could be anywhere.
Should be able to remove the inspection cover and look at it.
You should look here: http://www.links4jeeps.com/writeups/clockspring/
what dose a 1999 Alero transmission look like.
Look underneath the engine near the transmission. It should be there where it belongs unless someone moved it.
Look for a vacuum leak.
My Honda, in good running condition, idles at 700 RPM This is what it idled when it was new. For the 1989 Honda your idle speed should be between 750-1000 RPM and if you have any questions look under your hood and it will tell you right there.
If you have a carburetor, there is a crew on the driver side behind the throttle cable it usually has a spring on it if you turn it to the right it idles up left it idles down If its a fuel injected motor idle is handled by the computer. There usually is a "base idle speed" around 800-1000 RPM. This normally doesn't need to be adjusted. Have a look for carbon build up on the butterfly as well, this will influence idle too.
Should be in the main fuse block. Look for a fuse labeled "courtesy".
look on the bottom of the engine on the left hand side. you should see it there.
It should say in your owners manual, I believe it is 13.6 quarts for the 3.4 L but you should look in the back of your owners manual to be positive.