Just purchased a 02 gle from a local dealer. Car runs great but needs some body work which I will tackle after the winter.

Anyway something strange happens when I step on the gas to merge or pass a slower driver.

after about a sec or 2 the car shoots forward like a bat out of hell. At the same time I hear a sucking noise like the engine is pulling in air. I sounds really cool but I can't fine any aftermarket parts.

I did take it to my buddy and we put it up on the lift. There is a shiny newly welded bit like right after the header. Does anyone know what it could be?
Sorry i completely didn't think of taking a pic while I was under the car.

 

Pictures would have been really helpful bro. If you help us, we help you.

 

Yeah man...my bad. have an appointment at my mechanic next week. I'll take a few shots.

 

First guess would be an O2 sensor bung welded on, or EGR tube. Both would have either a wire or pipe going into them.

Pics or better description are certainly needed. Congrats on the new purchase!

P.S. Whatever is on the exhaust won't have to do with a 'sucking' noise, that would be a hissing noise (air expelling).

Seems to me you have either an intake leak or someone has removed stock baffles/noise suppressors. Have you checked the air filter to make sure it's in good shape and seated properly?

 

Very interesting.
No bro...no wires or pipes going to it.

How can I check for an intake leak? And I'm going to check the air filter now.