Ok.... car surging and dying again......

[avellanet.jr]

Originally Posted by PQ

Yup. Zebra (Jason) used them. From what I understand their LS guy isn't there much. Do you know what they charge for a tune?

Yeah, i've talked to Zebra while he was in the area about them. Jon doesn't actually work there, he just rents dyno time. A few months ago I stopped by and asked, I believe it was $600 (kinda pricey in my eyes), $200 for retunes and they like to give him a weeks notice to schedule.

[VADER SS L99]

Put your normal oil cap on and see what happens.

[PQ]

Originally Posted by VADER SS L99

Put your normal oil cap on and see what happens.

I'd have to run a hose back to the original intake tube just before the TB to the valve cover. I guess I can do it temporarily.

Raining like a mother tonight so I haven't been able to do ANY of this.

[VADER SS L99]

Originally Posted by PQ

I'd have to run a hose back to the original intake tube just before the TB to the valve cover. I guess I can do it temporarily.

Raining like a mother tonight so I haven't been able to do ANY of this.

Just a stab in the dark here but some of the problems you are experiencing sound like a vacuum leak and oil cap breathers can cause a vacuum leak. I also assume you have a catch can. If something in this system is not working properly you can have problems.

FYI: When the other guys asked you do you have a "breather" or "valve cover breather", they meant that thing sticking out of your valve cover that fits on top of your oil filler.

[Doc]

It's hard to tell from the picture but are you still running the stock plug wires? If so, replace them with high-heat-resistant racing plug wires which can stand the heat of headers next to them.

I had a very similar problem when I got my cam and finally wound up giving Ted Jannetty a try and he nailed the tune; through the MAIL. I bought the SCT tuner from him, told him exactly what I had on the car. He sent me a starting tune which I datalogged and he completely solved the idle issue. Mine would do the same thing; idle fine one minute, then start swinging low to high to low...getting bigger and bigger until it either died or I interrupted it by giving it some gas and it would stabilize.

I told Ted my symptoms and now the car idles great. Starts up cold much better than it did before. Mine was even touchier since I had removed 22 lbs of weight by getting a lighter clutch/flywheel, so having a stable idle was critical to being able to drive the car smoothly. Ted got it right with only one datalogging. He's that good so if all else fails, give Ted a try.

I've got a CAI, VMax Ported Throttle body, comp cam, LT headers, high-flow cats and Magnaflow exhaust. Mine's not forced induction but the idle symptoms you describe seem very close to what I was experiencing.

[PQ]

Originally Posted by VADER SS L99

Just a stab in the dark here but some of the problems you are experiencing sound like a vacuum leak and oil cap breathers can cause a vacuum leak. I also assume you have a catch can. If something in this system is not working properly you can have problems.

FYI: When the other guys asked you do you have a "breather" or "valve cover breather", they meant that thing sticking out of your valve cover that fits on top of your oil filler.

Ok. Well I have one. hahahaha

Yes, I do have the catch can. The last time I had this problem the catch can and breather had not been introduced yet. I am 99% sure this is the same problem just revisited and somehow masked for all this time. The problem is 100% in every way identical to the last time. I'm chasing it down the same again and redoing all the tests but I think I'm dealing with something that has not yet been figured out.

Originally Posted by Doc

It's hard to tell from the picture but are you still running the stock plug wires? If so, replace them with high-heat-resistant racing plug wires which can stand the heat of headers next to them.

I had a very similar problem when I got my cam and finally wound up giving Ted Jannetty a try and he nailed the tune; through the MAIL. I bought the SCT tuner from him, told him exactly what I had on the car. He sent me a starting tune which I datalogged and he completely solved the idle issue. Mine would do the same thing; idle fine one minute, then start swinging low to high to low...getting bigger and bigger until it either died or I interrupted it by giving it some gas and it would stabilize.

I told Ted my symptoms and now the car idles great. Starts up cold much better than it did before. Mine was even touchier since I had removed 22 lbs of weight by getting a lighter clutch/flywheel, so having a stable idle was critical to being able to drive the car smoothly. Ted got it right with only one datalogging. He's that good so if all else fails, give Ted a try.

I've got a CAI, VMax Ported Throttle body, comp cam, LT headers, high-flow cats and Magnaflow exhaust. Mine's not forced induction but the idle symptoms you describe seem very close to what I was experiencing.

I am still running the stock wires. Good advice. I'll do that soon. I doubt that's the problem since 7 cylinders log zero misfires and the one logs minimal and at high rpms. But I probably should get the wires.

And I'd rather stick a needle in my eye than use SCT.

[Higgs Boson]

Just FYI, stock plug wires work on some serious applications. I ran them on my 850 hp Z06 and just about every other high HP build I've been involved in with or without headers. the stock plug wires and stock ignition coils are better than aftermarket options, I would keep those stock....just my 2.....

[PQ]

Wires aren't my immediate concern. I'll deal with them later. Kinda would like orange to dress it up a bit.

But tonight I did a number of things. All to no avail.

It should be stated that the car runs absolutely fantastic. I'd just like to find the erratic idle factor. IF there is one. It may be perfectly normal and just need to be upped.

Here is the MAF sensor I cleaned. Certainly didn't need it though.

[Rhino79]

Sounds like an idle airflow issue, when you rev in park/neutral does it dip below idle speed then come back up?

[partymn]

Kinda makes you miss the old days of carbs don't it.


I am a noob on the new Camaro fuel injection but if it were one of my older fuel injected cars, the first thing that I would look at would be the IAC motor. The idle air control motor can cause these exact symptoms that you are experienceing and not throw a code. Plus it has no effect on anything other then idle. Like I said, dont know if these Camaro's have one.

[Scott@Bjorn3D]

Randy the outside of th MAF can look great and still be dirty as hell. Did you spray the inside with MAF cleaner? And then let it dry?

[PQ]

Originally Posted by Rhino79

Sounds like an idle airflow issue, when you rev in park/neutral does it dip below idle speed then come back up?

When it's acting up yes but not nearly as bad as in gear and moving at idle.

Originally Posted by partymn

Kinda makes you miss the old days of carbs don't it.


I am a noob on the new Camaro fuel injection but if it were one of my older fuel injected cars, the first thing that I would look at would be the IAC motor. The idle air control motor can cause these exact symptoms that you are experienceing and not throw a code. Plus it has no effect on anything other then idle. Like I said, dont know if these Camaro's have one.

Other than at idle there is ZERO problems. I've not heard of that on these cars but I'm not positive.

Originally Posted by Scott@Bjorn3D

Randy the outside of th MAF can look great and still be dirty as hell. Did you spray the inside with MAF cleaner? And then let it dry?

7-11 was all out of MAF cleaner.

I just wiped the outside off and used a tightened q-tip and wiped the inside. I'd be shocked if that was it. the air flow doesn't seem to have any harsh dips when logging.

After logging it (hasn't acted up for over a week now) the RPMs go up and down from 600 to 750 ish for the most part. a few below 600 and up to 800 every 10 seconds or so.

[BaylorCamaro]

Originally Posted by Scott@Bjorn3D

Randy the outside of th MAF can look great and still be dirty as hell. Did you spray the inside with MAF cleaner? And then let it dry?

Originally Posted by PQ

After logging it (hasn't acted up for over a week now) the RPMs go up and down from 600 to 750 ish for the most part. a few below 600 and up to 800 every 10 seconds or so.

After my car was super charged it was running fine. I was driving back to Texas from Florida, and about 150-200 miles into the trip I started getting some weird idle and it wanted to die when I was at a stop light. Driving it seemed to be fine, until later it started to misfire and acted really weird when there was an rpm increase, like if you were going up a hill, etc.

The MAF got damaged/dirty/blown out from the super charger and left me stranded in Tallahasse for two days while a dealership rushed order a new MAF.

Anyways, my point to to telling all of this is, if it is MAF related I'd think it would be getting worse and but it hasn't happened for a week? That's strange.

[Higgs Boson]

again, it's in the tune, base running airflow. I even posted a how to for whoever it is that gets the pleasure of fixing it.

it only does it under certain circumstances, when it is too far out of identical conditions for the maf to keep it smooth. it isn't tuned right.