System Lean after header install
Thread Starter
Joined: Oct 2007
Posts: 446
Likes: 1
From: Oakland, California
System Lean after header install Hi guys, I am having trouble with my '00 SS Camaro. It has BBK Header system(with their Y-pipe), Corvette O2 sensors, K&N FPIK air intake, and am running E85(just changed the stoich). I haven't figured out how to tune the MAF because the method I was going to use couldn't be used with the Beta version of HP Tuners(I had found this method on the HP tuners forum). After installing the headers today, I got a P0171 code, and also noticed that my intake temps got in upwards of +100*F! ISn't E85 suppose to cool things down? Can anybody offer any advice? I have the HP Tuners software, and have asked this same question over on their forum, but nobody wants to offer any advice.
I tried to upload my scan and tune here, but wasn't able to do so, so here is the link to my thread on the HP Tuners web site:
http://www.hptuners.com/forum/showth...711#post314711
I tried to upload my scan and tune here, but wasn't able to do so, so here is the link to my thread on the HP Tuners web site:
http://www.hptuners.com/forum/showth...711#post314711
Last edited by hcb1700; Feb 6, 2013 at 08:10 PM.
Yes of course it will change the way things read. And yes it is very common for it to read lean after headers. I have been using HPT since the day it came out and yes you can tune the MAF on this car with ANY version<beta or not, of HP Tuners. PM me if you need some help. BTW E85 doesnt run thru the intake as a LS1 is a port fuel injected engine so it will not cool down in coming air.
Thread Starter
Joined: Oct 2007
Posts: 446
Likes: 1
From: Oakland, California
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Hi guys, I am having trouble with my '00 SS Camaro. It has BBK Header system(with their Y-pipe), Corvette O2 sensors, K&N FPIK air intake, and am running E85(just changed the stoich). I haven't figured out how to tune the MAF because the method I was going to use couldn't be used with the Beta version of HP Tuners(I had found this method on the HP tuners forum). After installing the headers today, I got a P0171 code, and also noticed that my intake temps got in upwards of +100*F! ISn't E85 suppose to cool things down? Can anybody offer any advice? I have the HP Tuners software, and have asked this same question over on their forum, but nobody wants to offer any advice.
Did you have a wideband reading on that? I didn't see it in the log or what loaded when I opened the log file. how can you say lean if no wideband? Were the corvette 02s used? I suggest swap the 02s and see if the problem moves or stays on the same side. if it stays on the same side, then it is an installation/insertion issue. If it moves , then its the 02 sensor.
as far as the intake temps...well get it some fresh air and go driving, stop sitting still.
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Verdad Gallardo Everything is set all wrong to start tuning but as the above poster said, the B1 O2 is either very lean or dead. You have an exhaust leak, open headers with no extension off of the header or a completely dead O2. If you check these out I can help you out.
ISn't E85 suppose to cool things down?
Thread Starter
Joined: Oct 2007
Posts: 446
Likes: 1
From: Oakland, California
I finally got time to swap out the O2 for one of the stock ones that I modified. The new sensor that I put on was bad and now it is working properly with the modded Denso O2. It still lean, as it needs 30% more fuel with E85, but no more rough idle, or bank 1 lean code/random misfire. I don't have a wideband hooked up, and the HPT I have is the standard version, so there is no provision to add the wideband. I will take it out tomorrow with the scanner hooked up, and post a new scan log.
Thread Starter
Joined: Oct 2007
Posts: 446
Likes: 1
From: Oakland, California
Not sure, butas soon as I installed the modefied stock O2 sensor the problem went away. Now I'm just waiting to get the exhaust welded behind the Y-pipe where it meets the back pipe to get a more accurate scan log.
