LLY: Running straight pipe without programmer??

[DMax_Bella]

Hey guys new to diesel. Got a 04 lly love it so far but it is bone stock and thinking of putting straight pipe 5" exhaust after replacing turbo mp.
Question is will I have any problems running straight pipe without a programmer?? I have searched and can't seem to find a straight answer.

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[chevyburnout1]

You'll be fine.

 

[THEFERMANATOR]

Some may turn on the check engine light for an EGR low flow code, but not all will.

 

[Dozerboy]

Ya some do some don't. I would plan on getting a EGR code. IIRC if you don't want a programmer a Finger Stick will block the CEL.


Sent from a ditch being dug near you

 

[Lparrill]

I didn't get any codes when I had exhausts on either my 04.5 LLY or my 05 LLY when running 100% stock tuning.

 

[Taylor-34]

I don't have a programmer and am running 4" straight pipe just so I didn't have to deal with a code throwing with a 5" don't know how much of a difference 4 vs 5 is tho either

 

[THEFERMANATOR]

I didn't get any codes when I had exhausts on either my 04.5 LLY or my 05 LLY when running 100% stock tuning.

You probably had a code, but no SES light. And there are SEVERAL different emissions calibrations for LLY's. I have tuned a few now all Florida trucks, and some have thrown an EGR codes and others haven't with straight piped exhaust. When I looked at teh tune file you could see very different emissions system in each truck, yet these were all Florida bought trucks. So it's a crap shoot wether it will code or not, and if it codes it's still a crap shoot wether or not it will turn on the SES light. Same way with LBZ's.

 

[DMax_Bella]

Thanks for the advice guys. Sorry if that was a dumb noob question.

 

[Lparrill]

You probably had a code, but no SES light. And there are SEVERAL different emissions calibrations for LLY's. I have tuned a few now all Florida trucks, and some have thrown an EGR codes and others haven't with straight piped exhaust. When I looked at teh tune file you could see very different emissions system in each truck, yet these were all Florida bought trucks. So it's a crap shoot wether it will code or not, and if it codes it's still a crap shoot wether or not it will turn on the SES light. Same way with LBZ's.

You are correct. I should have been more specific. I did get a code when using my V2 but didn't get a SES on my 05. Didn't even get a code on my 04.5

 

[Taylor-34]

So is this code going to affect me when I throw my cat and muffler on for the emissions test?

 

[rivergoer]

it shouldnt as long as you delete it after you put cat back on. i used to have to put cat on return to stock tune hide programmer and pull egr blocker then delete codes to get it tested.. now i said screw it and i reg it in AZ with veterans plates to my vacation house.. if i get pulled over i show my military id and az id with ca dl and i dont get botherd about the reg not being ca. knock on wood i havnt had that problem yet. these emisions on our trucks suck ass. and 75 bucks for them to hook up a bull shit scanner and rap the throttle a few time. yeah joke..

 

[Taylor-34]

Thanks rivergoer, and you're a vet. They better not mess with you ha

 

[rivergoer]

No problem man... looks like you preety much have my set up there except GMC. hahah sme year miles and well i pull a 5 er toy hauler with about that same amount of angle hahaha. where do you go to the dez at? im in temecula and go to ocotillo,north shore and johnsons all the time.

 

[Taylor-34]

Same!! I go mostly ocotillo and have a quick swap out to run the dunes of pismo and dumont

 

[rivergoer]

awesome dude! we have a house on shell beach i can see pismo dunes from my patio so we just tow a quad or rhino down there sometimes. we should hook up for a couple beers some day when im back.

 

[rivergoer]

if you keep an eye out in temecula you will probably see my truck running around. it has a shell on right now and it has f word indudstries stickers on it. unless my wife pulled them off..