Hey group! I replaced my fuel filter and the fuel line to the engine on my 87 Jetta and now when I come to a stop the engine acts as if it's about to stall, revs drop about 250 rpm, it used to idle at about 950-1000. Now it'll drop to about 700-750 then shoots back up to 1000. Should I have replaced anything else or what do you think? TIA
Maurice