Today, since the weather was nice I was able to get the Z06 out and take a cruise. I notice right off duiring cruising speed on the highway that the car was now surging, slightly but it was there. Now the only thing that I've done since the last time I had it out was install the Blackwing with SLP cold air box, a hurst shifter, and the dual tip Borla. So the electrical connectors that were apart were the MAF connector for the Blackwing and the Active handling and spare cig lighter socket for the Hurst.
Do you think I did something to the MAF to cause this furing the BW install? I noticed in the BW kit they gave me a short section of black hose to connect the BW to the MAF inlet. I remember tightening up the worm clamp to the MAF inlet pretty tight to get the hose to hold right.

What does the list think happened ?

Thanks

 

How many miles have you driven the car since you installed the Blackwing? If less than 100 or so you may be experiencing normal relearn as the ECM trys to adjust the A/F with the addition of more air from your new system.

Check all the connections, if they are OK drive it around town for a 100 miles or so and see if it clears up.

Les

 

I'd look for an unmetered air leak. Check all your connections on the air hose carefully.

 

Never thought abotu an air leak.... :eek: I just used the diagnostics procedure for codes and found one code - 28-TCS C1287H, which was listed as "steering sensor rate malfunction". I do not think this has anything to do with it so I cleared it, restarted the car and it never came back on a second check. Wonder where this came from. Car has 3000 miles on it and the BW has @ 50 on it now.

So has this beena common problem with aftermarker intakes, surging and air leaks of some sort ?

:confused:

 

Surging indicates an airleak or bad turbulence in front of the MAF.

C1287 is fairly common on new Z06 cars. You will get a Service Active Handling Message when this code is detected. I got that code a bunch of times when my car was an infant but I have not seen it in a while.

 

I agree with RB, like I said first thing is to check the connections, especially those in front of the MAF. If they are good and the car is not throwing codes I stay with my drive it a few miles recommendation.

Common? My short answer would be yes, most of these systems are finiky and you have to be very careful that all connections are well sealed. Air sucking in ahead of the MAF will cause turbulence. Unmetered air after the MAF will cause a lean condition and codes.

Give it a good once over ")

Les

 

You guys are great !!! :D This is what I love about the forum, you get an answer right away. Air leak makes sense and did not come across to me at first. Tomorrow after work I'll check it all out and make sure everything is secure, then give it another test drive.

Thanks Listers... :seeya

 

Hey guys take a look at this post on the Z06 forum from awhile back

"One of the first mods I did was replace the factory accordian piece after i noticed it was terribly loose at the crimped on factory clamp and letting in extra O2 at the end of the airbridge. So I got the old 4" to 3" rubber plumbing adaptor hose from Home Depot and 86ed the accordin hose. It was hard at first to get on but it fit after I gave up trying to keep the airbridge mounted on the plastic studs.

Well the only problem with this hose has been since it was sunny south Florida and still africa hot out the hose being soft thick rubber constintly needed to be retightened every week or so. Until the other day when after being retightened again the hose poped off the airbridge and I put it back and the same thing happened. So upon closer inspection the side of the bridged had colapsed , so I took the bridge off to repair it temporarely with staples from a HD staple gun to keep the side aligned. I looked closer and the seems were split on booth sides. So now I have black duct tape to seal it up for the time being til I buy an aftermarket bridge.

Have any of you relpced the cheezy factory crimped clamp with a screw hose clamp? If so be careful not to over tighten the sides of the bridge at the seems are very weak this could be why GM uses a crappy crimped clamp here. I saw a post a couple of weeks ago asking if you noticed if your car shakes at idle and most people attributed it to the cam. But after I fixed the leak I had on my car most of that shake is gone. Maybe they are getting extra air leaking in causing this problem , would be worth looking at. Hope this helps anyone expirencing the same problem."

Now I DID notice that when I put things back together that the accordion piece from the bridge to the TB was loose as hell, and I left it that way. MAybe that is the root cause of it all. Maybe time to buy one of those silicone/rubber couplers and pitch the accordion ?


:smash:

 

Ordered a red power coupler from Xtreme MS today - hopefully solves the surging problem.... :seeya

 

I read your post carefully and noticed you also installed the SLP Cold Air box with the BW on your 2002. I remember several posts concerning the use of the Cold Air Box with the BW on 2002's caused surging! I would also ad, the design of the Z06 intakes (nose grills) really eliminates the need for a cold air box as there is a constant stream of outside air entering the engine compartment.

The thory with the surging is actually to much air being froced under a slight positive pressure via the cold air box. One suggestion- remove the cold air box and take a test 100 mile drive. Better yet, also do an idle relearn as it will reset the PCM. When you do the 100 mile drive drive her hard and she will re-learn well!

Hope this helps.

:cheers: :cheers: :cheers: :cheers: :cheers: :cheers: :cheers: :cheers:

 

As soon as I read a Blackwing w/ a Cold Air box, I knew that was it...
I had an '01 Z06 w/ those mods(pls a 'hogged' out MAF & TTS headers) and it did the same thing. I actually blocked the shroud w/ cardboard where the shroud was cut and it pretty much stopped the surging @ light throttle altogether. I sold the car before I could swap in a new shroud or replace the MAF w/ a stock type(screened). :(
Good luck, but I believe that is the issue.

FWIW, I also tried sealing the box very well--but the surge continued...

George