spitting noise on acceleration

[k5zx]

Does anyone know wht might cause this? I have searched every mustang forum and googled it. I can find nothing on it

 

[SpartaPerformance]

I don't even understand the problem can you be a bit more descriptive?

 

[69mach1-409]

With that limited of a description.. I'm guessing a small exhaust leak. Have you done any exhaust mods?

 

[STANGmole]

With that limited of a description.. I'm guessing a small exhaust leak. Have you done any exhaust mods?

Wouldn't an exhaust leak throw an engine code? Why I'm asking is that I 'think' (agreed...tough to tell from limited description) I have a similar sound which to my ears sounds like an exhaust leak; I've had no work done on the car though and it only has 3K miles on it. ???

 

[69mach1-409]

Not necessarily. The leak would have to be pretty big, and before the Cats to throw a code.

To find/confirm a leak I usually toss a car up on a lift, wait for it to cool, start her up, get some one to cover the tail pipes (enough to cause back pressure), and follow the pipes back to the manifolds feeling/looking for leaks.

 

[k5zx]

With that limited of a description.. I'm guessing a small exhaust leak. Have you done any exhaust mods?

when I accelerate the engine make a loud and distinct "spit". It throws p171 and p174 (too lean) codes.

I didnt want to post that before anyone answered. I thought maybe the exhaust too, might have been doing it. I didnt wwant to say so before anyone responded. I just had catbacks put on. Bassanis. one busted and was replaced with a magnaflow.

my sct wouldnt datalog. Ive had several people helpl through emails I finally took it to the shop in paris last weekend.
thanks everyone

 

[k5zx]

I couldnt figure out how to edit my post so I am replying to it.
I tried to datalog, but my laptop wouldnt read my sct, I just took my car in after 4 months problems.

The MAF sensor was just putting out 2.2 volts and also the flyby wire chip is bad. I dont know which was causing the spitting noise.