Open Flash Header Discussion

[Ctuckfly]

Originally Posted by 904FRSlow

Also I have nameless axleback 5" muffler 3" tips with the rest stock, would adding OFH make it sound raspy?

This what I've got and am wondering about.

[sirsol66]

Originally Posted by Ctuckfly

This what I've got and am wondering about.

If it helps, I run the OFH with a berk dual exit muffler delete and there's no rasp. So, I wouldn't expect yours will have rasp either.

[lucid215]

im running the ofh, invidia over \front pipe and jdm trd axle back. theres a bit of rasp if i rev from a stand still. but once i get moving it sounds really good

[Kelbyat07]

Originally Posted by sirsol66

If it helps, I run the OFH with a berk dual exit muffler delete and there's no rasp. So, I wouldn't expect yours will have rasp either.

How loud is your setup?

And does the OFH give the car the nice boxer sound?

[lucid215]

yes it gives it a good rumble

[tomaszjanczak]

I installed the OFH on Saturday and flashed with OFT Stage 2 UEL 91 octane. On Sunday, I got a check engine light with code P2097. I reset it but today it came back on with the same code. Could it be that theres a leak by the O2 sensors? All the bolts I torqued to the required amount so I can't image there would be a leak at any of the gaskets. Except for the OFH, all other intake and exhaust parts are stock. Any ideas?

[Foobar]

How tight are you guys torquing the bolts down? 22 ft-lbs on the engine and 38 ft-lbs on the overpipe?

[SimplePortal]

Anyone have this header plus an Ark catback exhaust?

[Wepeel]

Originally Posted by Foobar

How tight are you guys torquing the bolts down? 22 ft-lbs on the engine and 38 ft-lbs on the overpipe?

22 at the engine, 26 at the overpipe.

[Wepeel]

Originally Posted by tomaszjanczak

I installed the OFH on Saturday and flashed with OFT Stage 2 UEL 91 octane. On Sunday, I got a check engine light with code P2097. I reset it but today it came back on with the same code. Could it be that theres a leak by the O2 sensors? All the bolts I torqued to the required amount so I can't image there would be a leak at any of the gaskets. Except for the OFH, all other intake and exhaust parts are stock. Any ideas?

Did you use new gaskets?

[tomaszjanczak]

Originally Posted by Wepeel

Did you use new gaskets?

Yes, brand new gaskets at the header/engine and header/overpipe connections.

[steve99]

Originally Posted by tomaszjanczak

I installed the OFH on Saturday and flashed with OFT Stage 2 UEL 91 octane. On Sunday, I got a check engine light with code P2097. I reset it but today it came back on with the same code. Could it be that theres a leak by the O2 sensors? All the bolts I torqued to the required amount so I can't image there would be a leak at any of the gaskets. Except for the OFH, all other intake and exhaust parts are stock. Any ideas?

as other guy says new gaskets are a must or you will get leak

log you long term fuel trims , afr, commanded afr and , wideband afr

P2097 is fuel trim to rich

long term fuel trim should be less than say 7% if its way over that something wrong

afr is front o2 sensor measurement
wideband afr is rear 02 sensor measurement
commanded afr is what ecu is asking for

with an OFT

these three should read similar under load ie on the throttle.

its probably a leak or maybe damaged 02 sensor. penitrating oils ect can damage 02 sensors

[tomaszjanczak]

Originally Posted by steve99

as other guy says new gaskets are a must or you will get leak

log you long term fuel trims , afr, commanded afr and , wideband afr

P2097 is fuel trim to rich

long term fuel trim should be less than say 7% if its way over that something wrong

afr is front o2 sensor measurement
wideband afr is rear 02 sensor measurement
commanded afr is what ecu is asking for

with an OFT

these three should read similar under load ie on the throttle.

its probably a leak or maybe damaged 02 sensor. penitrating oils ect can damage 02 sensors

Thank you for the help. I did use brand new gaskets everywhere and did not use any penetrating oils on the O2 sensors. I will get a log tomorrow. Could it be that I just didn't tighten the O2 sensors enough? I thought I tightened them pretty well.

[steve99]

Originally Posted by tomaszjanczak

Thank you for the help. I did use brand new gaskets everywhere and did not use any penetrating oils on the O2 sensors. I will get a log tomorrow. Could it be that I just didn't tighten the O2 sensors enough? I thought I tightened them pretty well.

its possible their is leak near 02 sensors.

- Exhaust leak near rear O2 sensor
- Faulty rear O2 sensor
- Fuel contamination

Check the connection to the rear o2 sensor the plug may not have been pushed all the way in.