Rough Idle After Header Install

**isukathalo93** · 07-27-2015

After a near impossible SD Header install on my 06 GT i got everything hooked up and started her up... But the engine is shaking pretty bad to the point where you can feel it while sitting in the driver seat. The idle will stay consistent than stumble for a second. The CEL is on but even if it was running fine it would be on because i'm cat-less. I'm to afraid to drive it up to the autoparts store to get the codes read. The seal between the headers and the EGR tube has an exhaust leak but idk if that has anything to do with it.. Any suggestions on what i should look for?

**JamesIvey24** · 07-27-2015

id check plug wires/connections

**Travisgt2** · 07-27-2015

Make sure everything is installed correctly maybe in your excitement for new parts you forgot something it happens to everyone some time or another

**Scottydoggs** · 07-27-2015

did you take the spark plugs out for the install and removal of the stock crap? if not you cracked a plug or two easy.

**isukathalo93** · 07-27-2015

I did not so i will definitely check those out.. If anything it would probably be one of the rears. I was also looking up vacuum leaks as well, seeing as i was laying on top of the motor, and if i do recall some of those lines looked pretty brittle. Would the EGR not being sealed to the headers have anything to do with it? or no.

**Scottydoggs** · 07-27-2015

the egr needs to be hooked up. and its a loud ass exhaust leak too.

**isukathalo93** · 07-27-2015

Haha well yeah the loud exhaust leak is a little hard to miss

I was just curious if it was contributing to my performance issues is all i know i need to seal it. The problem is i work 7-6 pretty much 5 days a week so i don't have tons of time after work to mess around with stuff. But i will definitely check plugs tomorrow. On a side note i don't think i will ever install headers again on any car.. What a pain. I had to cut a few inches off the connecting pipe from front to rear manifold just to get it to work.

**Scottydoggs** · 07-27-2015

i feel for all you guys, mine installed two times with no real issues.

**isukathalo93** · 07-27-2015

I'm pretty sure the only thing that went smoothly was that i didn't need to dent the firewall for the o2 sensor. It has a decent clearance between it and the firewall. Oh and i could squeeze the pipe past the trans dipstick.

**Scottydoggs** · 07-27-2015

mine kjust cleared too, but when the engine moves it will hit the fire wall. most will hear it hitting when in reverse on the brakes. i know i did. bent the crap out of it too.

**isukathalo93** · 07-27-2015

I don't suppose anyone makes shorter o2 sensors do they?

**Scottydoggs** · 07-27-2015

it just as easy to beat the fire wall. or move it to the cross over pipe. what i did.

**JamesIvey24** · 07-27-2015

nah, move the bung. dont monkey around trying anything else...unless clearancing the firewall will help...should try that first.

**isukathalo93** · 07-27-2015

Im a little fed up with exhaust work right now haha. My first concern is gonna be getting my engine to run right.

**JamesIvey24** · 07-27-2015

fix the leaks you know you have first. dbl check your vac lines too.

**Scottydoggs** · 07-27-2015

i had that leak, my coin flew off on me when i blocked it, it will affect how the engine feels.

**isukathalo93** · 07-27-2015

Ive heard bad things about blocking off the EGR so i'm a little weary to try it.

**JamesIvey24** · 07-27-2015

youv'e heard bad things about stopping exhaust carbon from entering your intake?

**isukathalo93** · 07-27-2015

Oh so that's why the back of my throttle plate and intake are coated black? -__- here i thought they were painted lol. I ended up cleaning up my throttle body once i seen how bad it was the other day. And as far as the EGR delete goes ive heard it raises combustion chamber temps if you delete it.