fuel injector question

[redeonx]

im have trouble with my 89 240xs . it has been idlen kinda bad., but it starts idlen at 800 rpms normal then drops to 200 rpms only when i come to a stop or when its parked . mim going to clean out the plugs on the fule injectors today they dont look to good in there, any help on wat i should use on them to clean it would be a big help.

it has a ka24e rebuild motor i put in it. it went in easy.

and im have som exhaust probles i keep breaken the rubber hangers and suggestions on wat i should do ? or how many rubber hangers should be holden up the exhaust. ty for ur time i hope some one can help me