The car: 99 Civic si,
55000 miles
password jdm cf intake

Just installed an itr throttlebody and adjusted the tps on it because the previous tps was broken from a seller here on honda-tech. Well I didnt really have to adjust the tps all i did was bolt it on the throttlebody and checked the voltage. The multimeter read 0.44V.

Everything seems fine. But now i hear a very faint sucking sound near intake manifold-throttlebody. I think its the throttle body but I am sure everything is sealed correctly. Also when i turn off the car i hear a kind of sizzling sound AROUND the fuel rail area. I cant tell where its at. Im not even sure what it is.

Ill probably try putting the old throttlebody in to see if everything goes back to normal.

In the meanwhile id like to have anyones input. Thanks

 

Hissing sound....mmm vacuum leak? Anything on a bad idle? If so a bad idle theres a quick way to check if the engine is running from a vacuum leak place your hand over the TB and it should try to suck and die in a matter of a second or two. If it continues to run there is a vaccum leak or use carb cleaner and look for bubbles.