my car is jittering. like above 2500 it jumps. the rpm drops 100 for a milisecond. but i just gotten a newer motor put in. this problem was like that before the swap and it is still there. i was wondering if it had something to do with the exhaust system. i have 2 1/4 in. piping running all the away from the cat to the axle. because i gotten a stock si muffler put on. i thought it would be back pressure dealing with it. want to fix it soon

 

Just a tip, but a subject line other that ???

 

you should also tell people what kind of car it is.

 

its a 93 civic dx coupe.
why didn't you bring this to my attention while it was here?
i could have checked it out for you. it ran great when i drove it. what speed are you at when this happens? i can take a look at it if you want me to. i didn't notice this problem. give me a call man. ill check it out.
it running good otherwise??