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1SLOSN95
03-04-2009, 12:47 AM
Well about a month ago i put long tube headers on my mustang...during the installation the EGR tube posed to be a real PITA so we cut it...we capped off the spot on the header...which still leaks because my buddy cant weld...and he tried to seal up the tube by beating the end with a hammer and running a bead across it...u think the tube not being sealed could cause my car to run iffy...it doesnt have any power sometimes but then suddenly goes to its full potential...idk whats going on...when im at a stop light with it in drive and on brake the car vibrates really bad...any input people???
5-SpeedBird
03-04-2009, 01:13 AM
did you ever tune it after the LTs?
1SLOSN95
03-04-2009, 01:31 AM
Nah its not required...people put these headers on everyday and not get them tuned and they run fine...
esg-642t
03-04-2009, 05:04 AM
Any CEL's?
Prob has something to do with the fact that you basically have an exhaust leak.
1SLOSN95
03-04-2009, 05:05 PM
thats getting fixed this weekend
MadStang
04-10-2009, 08:45 PM
it's for two reasons:

You NEED to be retuned for the EGR delete.

You have an exhaust leak which is throwing your o2 sensors off causing the car to try and correct itself, thus, producing a rough idle.
Ducky
04-11-2009, 02:09 PM
it's for two reasons:

You NEED to be retuned for the EGR delete.

You have an exhaust leak which is throwing your o2 sensors off causing the car to try and correct itself, thus, producing a rough idle.
This.

Do you know what the EGR does? The engine is designed to account for the returning gasses. Which it is now lacking. Plus, a tune will make the LT's worth the $$$.