Been viewing forums for a while but first post so far :P
Anyway I have a 1998 astra g which very recently lost most of its power and flat out would reach a measly 65. It was also misfiring and felt very lumpy to drive with zero acceleration.
I've just changed the spark plugs after some advice from a mate and the cars stopped misfiring but still has little power (more than before but still pathetic). Any ideas what might be wrong? Theres no visible damage under the hood or car and no warning lights.
Any advice would be fantastic.