Whats wrong with my car??

[Rasco]

My car has been really sluggish. When I floor it....there's no response, the rpms go up slowly and it seems like its having a hard time. The car does it frequently especially during start up. Once in a while it'll run fine. Another thing I noticed is that when i really floor it...rpms climb up really slowly then I would hear a loud *thud*....the car would then imediately accelarate faster as if I had nitrous. I already changed the air filter, oil change, and plugs but its still the same. Do you guys have any suggestions on how to diagnose this problem? Thanks I appreciate you help.

[Aussie Ed]

trying cleaning out the throttle body of carbon deposits.

how old is your car, what transmission is it???

[Nico]

How is your distributor + wires ?

[xtychx]

I hope you are not implying that you floor it during start up...

-xtychx

[Gen3cruiser]

My old corolla did the same thing. Turns out only 3 cylinders were firing until at a certin RPM, like 2300 I think it would start to accelerate hard. Bet your also running on 3, go check it out.

[itsmycookie]

Put gas in your car
that might be whats wrong with it, or some other fuel problem

[dan99solara]

maybe its just slow?

[Tony the Tiger]

Well, what engine do you have? Without telling us your specific engine, all we can tell you is the general things like plugs/wires/cap/injector cleaner/TB cleaner/air filter/tranny fluid/basic maintenance.

[Rasco]

Its a 92' Camry with an automatic transmission...rebuilt 5SFE. Eveything is pritty much replaced and the T/B & intake manifold is super clean. Im thinking it might be a faulty sensor. The car has a hard time starting too ...I always have to crank it twice. Could it be the fuel injectors or pump?

I don't floor it at start up, there's enough fuel in the tank, and its not just slow...you can tell there's something wrong with it.