My 87 TII has low compression, because it doesn't start when it is hot. It also idles like crap too. I think it could possibly be a vaccum leak but i am not sure. I'm ticked off and sick of losing to shitty cars. oh and i am guessing but i figure the cats are clogged too. I found a little vacuum line next to the AVC that is capped but idk what it is too. PLEASE HELP!