Posted: Sat Jan 07, 2012 1:40 pm Post subject: Got a code, need a tune?
Ok so the other day my car threw a P0171 running lean bank 1. Car seemed to be running fine so I deleted it with my aeroforce thinking if it was running lean constantly it would come back right away, well it didnt until today (a couple days later). Ive been meaning to get a tune but I was waiting on a couple more parts so I didnt waste money on 2 tunes. Any ideas what it could be? Been told it could be the o2 sensor upfront, bad injector(s), fuel pump going bad, fuel filter clogged, or my car needs a tune with my mods to get more fuel. Well if you take a look at w body store headers the front o2 sensor only reads the front three cylinders so if it was the pump or filter it would happen to all the cylinders right? Just trying to figure out what it could be. I dont want to destroy my engine.
If its simple stuff you wont need to re-tune so you should be good. If its something more like a cam or rockers you will need to retune, but you can call intense and they can retune the pcm (should be a lot cheaper than a 2nd tune too)
A gen v, northstar throttlebody, and lower intake possibly do a e85 swap as well but probly not the same time depends on money situation at the time already got the throttlebody just need to get the lower intake and supercharger
Yeah, you'll need to re-tune. Honestly, Id consider investing in a tuner. You can get a DHP for like 300 used on clubgp, and you're going to spend at least 200 on tuning..more if you do an e85 swap. Then you can get a lot better of a tune, and you can retune whenever you want for free.
I'd also look at a T fitting underneath the supercharger. Dunno what its called but I had lean codes and the engine was running like crap because it was broken. Guess its common because all the L67 engines in a few junkyards had them broken.
the car doesnt run like crap, it drives just fine except for the occasional part throttle knock. The t looked fine i will check it again. i just installed a boost gauge a couple days ago so i took the one off under the snout to get some more wiggle room when i had to cut the line for the extra t, it looked fine to me. A couple people on grand prix forums say its because of my exhaust leak from the egr to rear header connection so im thinking about just getting a intense pcm and having the egr deleted from it so i can just remove the damn thing.
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