I just installed an after market intake / filter and it has set the Check Engine light!? How can I get rid of it? The car seems to be running fine. Thanks.

 

take it to an autozone, pep boys, or advance store. they will read and clear it for free. now if it comes back after that your gonna need to go visit a real shop.

 

Maybe in Florida its free, up here $90

 

Wow $90 to read the codes. I thought it was free everywhere. It's free here in TX as well.

OP: Grab the code and we can tell you what it is and what you'll have to do to fix it!

Jon

 

Do an advanced search on......... surge...and surging.

 

PM sent

 

You can buy a scanner for less then that.

Autozone is free around here as well. I think you need to find another parts store.

 

If the battery is disconnected for a minute the codes will be cleared. You just won't know what they are unless the light comes on again.

 

To answer your question, you did an airflow modification thus you need to tune. Your codes will be P0174 and P0171; lean long term fuel trends. You need to tune the car to make it not run lean at idle. It also makes the car run richer at wide open throttle. Your power gains from the mod you did will not be had until you lean the car out at wide open throttle and richen up the long term fuel trends.

Any mod that affects airflow needs to be tuned. You cant just put such mods on the car without doing so.

Autozone here doesnt charge for reading codes. If that was the case, I would do that for a business venture. 90 bucks for one minute's work using a 50 dollar tool............

 

Thanks to all. I pulled the neg. cable for awhile and the CEL is gone. I know I need to get the codes read and/or buy a tool anyway. It's hard to fool Mother GM...... I think a lot of us waste a lot of time and money tinkering, but it is hard to break old habits.

 

IT'S BACK!! I guess the new intake, which was billed as "needing no tuning, and causing no problems", has it's first unhappy customer. The CEL is back and will probably stay that way until I can get help. It may, infact need a "tune" as someone suggested, but that will not happen. I will try to take advantage of a very generous offer from a fellow southern Arizonan to read and reset it for me. Any other ideas or suggestions are very welcome. Thanks. :o

 

Which CAI did you install?

 

Halltech "Killer Bee II." I have had other Halltech intakes on other Corbettes without a problem, but the new '10 GS dosen't seem to like it....

 

I'd like to jump in here and add that I also purchased a KB II with beehive recently and am having similar issues BUT Jim has been VERY helpfull in trying to resolve the issues. He's even sent me a new air bridge & MAF to see if that helped. So far no luck but I am continuing to see if it's my lack of skill or what. Jim is in cyber contact constantly with things to try. I will be checking the system more this weekend to make sure I have everything tight and in place. Will also check for air leaks if needed.
I have an 07 ZO6 with a Katech torqer cam, LT headers, Corsa Sport exhaust and new tune. Started getting CEL and Service Traction Control message after KB II install and tune.
CEL caused by lean codes P0171 & P0174.


Kelly

 

Jim has emailed me too, with suggestions and possible fixes. I am going to work on it tomorrow, and will post results. I really hope I can get it to work properly. Regardless, I would like to publically state how appeciative I am of the Halltech follow-up. Jim seems to be on top of things.

 

Same issue here. P0171 (system lean bank 1) after KBII install and tune. The code always seemd to pop up at idle. Jim has been very helpful with me as well. He sent me a new bridge, with a different PCV location (in the hose instead of in the bridge itself). I bought a monitor, and have been trying to log my STFT and LTFT numbers since the bridge change. So far, no codes, and the LTFT's have been in the +8 to + 12 range at idle (only 25 miles since the swap). I wish I would have had some data prior to the bridge change for comparison. I'm hoping to log some additional miles this weekend.

- Jason

 

Most CELS are caused by LTFTs and its not limited to what they are at idle. You may have +25% at cruising speeds on the hiway. A change of some part may take them from +25 to +21 but its far from optimum. I doubt it was your idle fuel trend because an airbridge isnt going to change them from +24 to +12 unless it had a small leak....after the MAF.

When you get your car from the factory its already running lean at idle and rich at WOT. For those of you thinking that no check engine light meant there was no problem, here is the hard reality:

Your car corrects average fueling to stay at 14.7:1 at cruise and idle within a +/-24% range. At WOT it looks at the lean amount and dumps that much more fuel for safety. So lets take the example of the guy who has air cleaner X. His addition of the air cleaner took the car's fuel trend up to 22% lean and he has no check engine light because its not over 24%. When he floors the car, the computer sees he is running 22% lean at idle/cruise and then dumps 22% more fuel than the commanded amount. His car is running pig rich and is getting big deposits in the combustion chamber and on the tops of the pistons. Its far from ok but the owner thinks he is fine because there is no CEL.

Now the same guy takes off that air cleaner and puts on Air cleaner Y. Air cleaner Y flows better so more air gets into the engine. His fuel trends now go to 25.5 up from 22 and he gets a CEL. At WOT the car dumps 25% more fuel.....same pig rich condition.

A lack of check engine light doesnt mean good. They both need to tune for the mod as you do for any airflow mod.

To the OP, the new aircleaner is the better one because the lean condition (CEL) is showing it flows more air. If the unit was advertised as no CEL will result it usually means if the rest of the car is stock. The more air flow through the engine, the worse the tune departs from optimum. No airflow mod makes any real power until you adjust the new fuel curve to take advantage of the additional airflow.

Clearing CELs doesnt fix why you get them so they keep comming back. It isnt a defective air cleaner....it means its a better one.

 

Resetting the codes with a reader or scanner is no different than disconnecting the battery. The real favor is to get it scanned while the car is running with HPtuners to verify where you lean condition is.

Bone stock cars running rich from the factory wind up never making full power by the time they have 30k on the clock due to hot spots caused by carbon deposits. I have done enough head swaps to see what these cars look like inside when they have mods that werent tuned.

Just sharing and no need to take heed.

 

Some problems with installing new air intakes is that many cause air turbulence around the MAF, especially the LS3 and LS7 engines with the blade type MAF and the aftermarket mfg's realize this. Ff the MAF reads crap going in, the computer sends crap out. Before trying to use a tune to correct the problem, first eliminate the source of the problem...turbulence surrounding the MAF.

Turbulence can be severe enough to cause a CEL or maybe just a "Service traction Control" and "Service Active Handling" to appear on the DIC. It may be present, but not severe enough to throw any codes, just degrade the car's performance and gas mileage. Many people never get a code thrown but experience surging. They remove the aftermarket intake and the surging problem is resolved.

Callaway, a well known and respected company, knows that their air intake, the Honker, can cause problems on some cars with turbulence surrounding the MAF. If you experience surging with your LS3/LS7 after installing their Honker, they don't try and sell you a tune, they sell you a diffuser that they designed and fabricate, to solve the problem.

 

Thank you SpinMonster, et.al. I appreciate your help and information. The checked the PCV line connection, etc. at the recommendation of Jim Hall, and now the CEL is out. I will get the codes read and take it from there. Appreciate all your help, even though I am a little "chagrined" at causing this problem. :o