Help on wierd "thud" Options

[Athorn]

I have not noticed it while driving (maybe from the vibrations of the road) but when im stitting at a stop light once in awhile my car will make a wierd thud there is no noise but that is the best way to describe it. The only things that i can thing of are that i just replaced the spark plugs and wires monday maybe something went wrong with that (misfire) and also on monday i took a bad speed bump maybe that messed with the muffler? It still drives fine im just worried about what it is. I have tien s tech lowering springs so thae front of my car is a little lower but i have never heard of a speed bump doing that. Sorry if im rambling, and any help would be appreciated.

[creis]

need more info, where did the thud come from, front/back/left/right? I dont think a missfire would make much noice at all if you even noticed it, maybe a little backfire. was it just bassy (subwoofer like pound) and about how load? and how long did it last?

[Athorn]

Its hard to tell where it comes from besides in the engine..i mean i can feel in in the floor boards and it only lasts for a second. I noticed a couple of time when i was in second gear but its hard to tell while i am driving. There is no noise at all.

[laff09]

check the snaps on your shift cables, and make sure they are working properly.

[Athorn]

I can shift fine and i notcie it the most while im just sitting there. But i took a bad speed bump last monday and it sounded like it hit underneeth preety hard.

[808celica]

prolly a bad engine mount..........and vibration from the motor. just my guess............