So my problem started about a week ago it wouldn't accelerate so I thought dirty mag clean it but still nothing so order a new one put it in an it helps but still doesn't speed up an now I got this really bad hissing when I hit 4 to 5k rpms Wat do you guys think it can be

 

vacuum leak somewhere, did you take the maf back off and check the o-ring?

 

Yea I did took everything apart even put my oem air box an still nothing
I think hissing sound is frm exhaust gasket is bad
But can figure out why I can speed up like I use to

 

Look for signs of soot around manifold. If you do have an exhaust leak then its possible the computer isnt getting correct reading and running lean.

Sent from my SGH-T999 using Tapatalk 2

 

Most likely exhaust leak if you're not throwing codes. I ran w/o a mid or rear section before and felt like I was hauling a full trailer. Do you have an aftermarket exhaust or stock? Check the connection points for leaks.

 

I got the dezod green headers an a cat back
All my Connections are welded

 

Getting Megan s pipe goin to check where the s pipe connects
I was revving engine while someone sprayed seafoam into throttle body an bunch of white smoke came out an drove he seems to speed up but not quite there yet

 

faulty tps possibly? exhaust leak at the manifold will deff cause slow acceleration. If its vacuum related, your car will prob idle poorly too so idk if your problem is vacuum.

 

So I found out wat it was I mess up my headers I destroyed my cat an it clogged my s pipe
But I swap my headers to some strup headers an my Megan s pipe