# LT1 ????

**URL:** <https://forums.speedlife.net/t/lt1/200381>\
**Category:** PittSpeed Automotive\
**Created:** [October 27, 2008, 8:12pm UTC](https://forums.speedlife.net/t/lt1/200381 "2008-10-27T20:12:26Z")\
**Posts on this page:** 8\
**Page:** 1

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**Author:** ![ZXGTO06](https://avatars.discourse-cdn.com/v4/letter/z/e47c2d/32.png) [@ZXGTO06](https://forums.speedlife.net/u/ZXGTO06)\
**Post date:** [October 27, 2008, 8:12pm UTC](https://forums.speedlife.net/t/lt1/200381/1 "2008-10-27T20:12:26Z")

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My little bro has a 97 6sp z28, we put long tube headers catless mid and slp loudmouth on the car also it is running the o2 sims. It ran with no “check engine light” for about 300 miles then it came on! I read the code and it is saying insufficient EGR flow??? changed the EGR and still the same code. I know it has to do with the headers but how do i fix it ?!😕

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**Author:** ![SPC\_Wright](https://avatars.discourse-cdn.com/v4/letter/s/e36b37/32.png) [@SPC\_Wright](https://forums.speedlife.net/u/SPC_Wright)\
**Post date:** [October 27, 2008, 8:51pm UTC](https://forums.speedlife.net/t/lt1/200381/2 "2008-10-27T20:51:45Z")

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sure it isn’t the air pump? I know when I pulled mine on the Bird, the light came on. Are those the Casper O2 sims? If so, email em and let em know so they can fix it for you.

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**Author:** ![ZXGTO06](https://avatars.discourse-cdn.com/v4/letter/z/e47c2d/32.png) [@ZXGTO06](https://forums.speedlife.net/u/ZXGTO06)\
**Post date:** [October 27, 2008, 8:57pm UTC](https://forums.speedlife.net/t/lt1/200381/3 "2008-10-27T20:57:32Z")

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I will look into the air pump. Im not sure what sims he is running i will talk to him and see. Thanks!!

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**Author:** ![Jeff95TA](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/jeff95ta/32/5935_2.png) [@Jeff95TA](https://forums.speedlife.net/u/Jeff95TA)\
**Post date:** [October 28, 2008, 3:41am UTC](https://forums.speedlife.net/t/lt1/200381/4 "2008-10-28T03:41:54Z")

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I assume the headers have the bungs for the emissions hookups on them?

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**Author:** ![SPC\_Wright](https://avatars.discourse-cdn.com/v4/letter/s/e36b37/32.png) [@SPC\_Wright](https://forums.speedlife.net/u/SPC_Wright)\
**Post date:** [October 28, 2008, 3:48am UTC](https://forums.speedlife.net/t/lt1/200381/5 "2008-10-28T03:48:46Z")

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I was gonna ask em that but I figured that was a no (if he’s running sims)

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**Author:** ![Jeff95TA](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/jeff95ta/32/5935_2.png) [@Jeff95TA](https://forums.speedlife.net/u/Jeff95TA)\
**Post date:** [October 28, 2008, 5:15am UTC](https://forums.speedlife.net/t/lt1/200381/6 "2008-10-28T05:15:27Z")

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Yeah, I had my EGR and air pump deleted out of the computer when I removed them.

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**Author:** ![Ymesss](https://avatars.discourse-cdn.com/v4/letter/y/ad7895/32.png) [@Ymesss](https://forums.speedlife.net/u/Ymesss)\
**Post date:** [October 28, 2008, 5:21am UTC](https://forums.speedlife.net/t/lt1/200381/7 "2008-10-28T05:21:19Z")

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Yeah usually your kinda fucked on camaros when you put headers on, get a tune and get the codes deleted.

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**Author:** ![ZXGTO06](https://avatars.discourse-cdn.com/v4/letter/z/e47c2d/32.png) [@ZXGTO06](https://forums.speedlife.net/u/ZXGTO06)\
**Post date:** [October 28, 2008, 9:17am UTC](https://forums.speedlife.net/t/lt1/200381/8 "2008-10-28T09:17:17Z")

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The headers do have the bungs in them. who around here will tune lt1?

The front 02s are in the headers the rears are in 02 sims.