I get the ck.eng.light sometimes after excelerating to fast, i purge the gas cap and it goes out.

 

I had a Callaway Honker installed yesterday and the engine light came on after driving home. I returned to the shop that installed the CAI and the fault was caused by the volume of air being out of the limits. This occurred when the car was stopped and the cooling fan came on reducing the air to the engine. This apparently has occurred only on some of the 2008 C6's. Callaway had a fix for this problem that was installed to correct this on my car. I drove 40 miles back home and did not experience the engine fault. I would recommend contacting Callaway if you have this problem. In regard to determining what is causing the fault, I understand you can call OnStar and they can run a real time diagonostic.

 

Buy a scanner, they are cheap!

 

Pauzao,
I wonder if it is "the same issue". I don't think we have enough info yet to make that call.

Did you still get the "Check Engine" light after you replaced the rubber cuff and MAF sensor housing?

 

Could you please tell me whether there were any drivability issues and what the "fix" was. We don't know who your shop contacted at Callaway, but we haven't identified coolant fan airflow being a problem for naturally aspirated Honker applications.

 

HI Mike, I sent you an e-mail. Please look at post 22, as he and others have experienced the same issues with the Honker and the 08 MN6.

 

Hi,
Rain wasn't the problem. We've driven test vehicles in deluges, snowstorms, and simulated storms and never triggered a diagnostic trouble code.

When was the Honker installed? Did the engine run any different than normal? Please let us know if you get the PCM scanned.

 

I just responded to your email. I'm concerned, but I'm just not ready yet to call your situation, teuhl's and pTr73's issue "the same issue".

You mention others. Do you know of others with Honkers who are triggering "check engine" lights, so we could do some investigation here?

 

Mike, I replied back. This issue is mostly with 08 cars.

 

Got your reply. You mention here that "This issue is mostly with 08 cars". Other than the two people posting here, do you know anyone else with a Honker that got check engine lights after installation. If so, I'd like to contact them. If not, I don't want people to think there's an issue with the Honker, if there is none.
Thanks.

 

If you search the forums, you shal find more related posts.

 

I've searched. Can you please point me in the right direction?
Thanks.

 

Thanks for calling and filling me in on the details. I also talked to your installing shop to talk about the "kit". It sounds like they encountered a phenomenon we've only seen with our supercharged Callaway Corvettes that we build in-house. The Honker system has such low restriction that the coolant fan's airflow can be detected by the MAF sensor. We haven't seen this as an issue with naturally aspirated applications, but with the PCM calibration we use with our supercharged cars, we had to compensate for this.

The issue isn't so much that the fan "reduces" the airflow to the engine; it's that the PCM expects to "see" certain values from the MAF sensor under certain conditions and, when the fans come on, it sees unexpected output. So it triggers a check engine light.

It turns out that the "Kit" your shop used was some parts from the Honker system that we build for MagnaCharger applications. These are standoffs and fasteners to lift the Honker filter element base from the radiator shroud surface. For supercharged cars, the cold air access hole is not cut into the radiator shroud.

This is only an idle-related condition. We haven't seen surging result from this situation. People experiencing surging with the check engine light may be having an unrelated problem.

By the way, you selected an excellent shop to work on your car. Reese *** and his guys at MTI Racing do an excellent job.

I'll have more on this during the week when I'm back in the office. If anyone else has experienced the check engine light right after installing the Honker in an LS3 or LS7 (and the fans cycled on), and hasn't called Callaway about it, I need to know so we can have a proper response.

 

Today I had the Callaway diffuser installed to mount the Honker as originally designed. No problems!!! While at MTI Racing in Atlanta, I had a low temperature thermostat installed. Reese made adjustments to the fan controls to work in conjunction with the low temp thermostat. Temp is reading less than 180 degrees with outside temp in low 70's. I am more and more impressed with the MCI Racing organization upon each visit. Highly recommend for your upgrades.

 

Sorry this took so long for me to respond, I didnt see this post until today. I didnt think rain was the culprit, I had 3 incidents with the check engine light coming on, the first 2 times i disconnected the battery and it went away... The second time I left it alone and it went off on its own. I do remember travelling over bridges before they came on (250ft above sea level). I know this might sound silly but do you think the air pressure that high might affect the MAF being that its sensitve? I am going to take the car to work tonight (going over the bridge and see if I get the light again.

 

Atmospheric pressure between sea level and 250 ft. above sea level isn't that different, so I don't believe the altitude is affecting MAF sensor input. There are Honker owners in mountainous regions with much greater variations in daily driving.

Is the road surface on the bridges solid, or is it made of steel grating where high winds could come up through the road surface and cause high turbulence under the car?

 

No grating as far as wind turbulence getting under the car. The road surface was a bit bumpy in places (maybe jostled the MAF a bit to cause an error IDK). I try to look at every possible reason even if they seem far fetched.

Regarless of any glitches which I know it isnt the honker itself. I am still 200% satisfied with design and quality of it. Which is why I chose it over all the other aftermarket CAI's out there.

BTW where can I get a replacement filter? Or do I wash the one I have in the car now?

 

You can either wash and reoil or replace the filter element.
Callaway sells replacement filter elements and K&N filter cleaning kits.
You can go to the Online Store on www.callawaycars.com or call us at 860 434 9002.