anywhere under about 3500rpm it feels like its bogging down real bad the codes say system too rich and fuel trim malfunction, a few weeks ago it also said cylinder one misfire so i got new plugs and ngk wires, cap and rotor, and it ran a little better but still it has no power at low rpm, it seems like its starved for fuel or flooding out, when i get on it and hit second it shoots a black cloud out the exhaust so i know its got to be really rich. any body have any idea whats wrong?? its a 98 five speed 140,000 mi. it also has a aem cai and i just bought a new filter so its getting enough air also changed the fuel filter today and erased the codes. i listened to the exhaust closely at idle today and it sounds like its miss firing on a cylinder or something and the exhaust stinks bad so maybe a clogged cat? but i don't think it would be the cat cause it still runs fine at high rpm please help!!!


Modified by d15bdelsol at 7:46 PM 5/20/2008

 

have you check you vaccum lines? have you pull out the plugs and see which one is wet? are the firing order right? have you check compression?

 

no i haven't done any of those, the plugs havent been wet but definitly rich. i did the wires one at a time so i know the firing order is still corect. and i don't have anything to do a compression check


Modified by d15bdelsol at 9:35 PM 5/20/2008