I Think I'm Having Back Pressure Issue

Antfrank · Jun 26, 2017

so I recently changed my mid pipe from the o/r h pipe unknown brand to a o/r x pipe bassani. After that happened now basically there seems to be a back pressure issue where when stepping on gas it sounds like it's holding all the air in. I can't really explain cause I'm new to cars but can't seem to figure out what can cause this problem. Any help would be appreciated.

Dan02gt · Jun 26, 2017

Hmm if I had to guess I would say you have an exhaust leak at the header flanges. They can be a pain to seal up 100%. A very small leak can be loud when you step on it. I had to put washers under the nuts on mine to get it to properly seal.

Antfrank · Jun 26, 2017

See but my exhaust isn't loud only in 3rd gear at 2800-3500 rpm other then that 1st 2nd gear all rpm and 3rd higher then 3500 sounds like air is being restricted

General karthief · Jun 26, 2017

Just changing the pipes shouldn't change anything unless you went smaller, run the codes and check your fuel pressure.
It was plug and play right? Nothing unusual?

Antfrank · Jun 26, 2017

Yea didn't go smaller same size and everything just went from h to x pipe and now all the sudden this happens. I will check the fuel pressure thanks

General karthief · Jun 26, 2017

Can you swap the h pipe back on for a test run?

Antfrank · Jun 26, 2017

karthief said:
Can you swap the h pipe back on for a test run?

i was thinkin about doing that sometime this week if I can't figure out this issue. I have asked all over coming up empty

jrichker · Jun 27, 2017

An offroad pipe is nothing but a empty pipe - no baffles, no converters, noting to obstruct the flow of exhaust. Therefore unless something got stuck in the pipe, there is nothing to block the flow of exhaust gases.

Cut a 1"x6" streamer of paper and tape it to the top of the outlet of each tail pipe so that the long end of the streamer is like the tail of a kite.. Start the car and let it idle; observe that both streamers flutter in a similar manner and have about the same amount of flutter. That tells you that the exhaust system does not have an obstruction in one side.

Antfrank · Jun 27, 2017

I will try that thanks

Mustang5L5 · Jun 27, 2017

Did you remember to plug the O2 sensors back in? Did you run the engine codes?

Really shouldn't be a difference in flow between the two off-road pipes. H-pipes tend to product more low end torque, while X-pipes produce higher end HP. You could just be feeling the shift in the torque to higher RPM.

I Think I'm Having Back Pressure Issue

Antfrank

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Dan02gt

mazing how much gas smell came from that tiny hole

Antfrank

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General karthief

wonder how much it would cost to ship you a pair

Antfrank

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General karthief

wonder how much it would cost to ship you a pair

Antfrank

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jrichker

StangNet's favorite TOOL

Antfrank

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Mustang5L5

That is…until I whipped out my Bissell

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I Think I'm Having Back Pressure Issue

Member

mazing how much gas smell came from that tiny hole

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wonder how much it would cost to ship you a pair

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wonder how much it would cost to ship you a pair

Member

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Member

That is…until I whipped out my Bissell

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