I just got the intense stage 4 package installed and they dynotuned it. I was looking for any input on the results. My other mods are listed in my signature. I am getting a lot of excess air from my exhaust. Feels similar to a subwoofer releasing air at idle. I just keep getting bursts. I also have thrown error code P0171 three times.

I checked my knock sensor as well. It stays 0.0 most of driving and all of idle; however, when I initially rev it might hit 0.3-0.7 for about 1/4 second, but this is not always. I have noticed though a little knock in second at the high end (0.2) very minor and short duration. It is fairly bad in third though. I get 0.7 to 2.4 at the high end, but it isn't always.

Anyone have any opinions on the severity of the problems and potential fixes short of a retune? BTW, e-mailed them and waiting for responses. Just figured I would get others opinions too. With the holiday they might take a while to answer and help.

 

hmm
whats the a/f?

 

I have a hard time watch knock and air/fuel at the same time while reving, but it is around 14-15 little or no gas, around 11.5-12.5 high rev. I haven't seen it drop past 11.5 let me upload my dyno airfuel chart.

 

and it's still together?
hmmmmm

 

here is the dynorun

actually, that dip you see about 3k might be where most of the knock is coming. Now that I'm looking closely. Thanks for your help and responses. I was just asking stefanie if she knew anyone and you had already posted lol.

 

im good like that.

if they would have brought the fuel in further up in the power band, like it should be done in the first place, the torque would have been higher, and would have less chance of knock.
but back to the code. that i have no idea to be honest

 

from an old school point of view, its needs cooling, larger interchanger/cooler, might be at a compression that is too hot, given the octane rating. and feed it a little more, do you have an air fuel ratio meter setup? rule of thumb was 14:1
look at yor plugs too?

still pretty impressive!

 

The afr should be under 12 at WOT to run good. You might have a bad tune other than that i dont know lol

 

14.1 for what?
wide open?

 

I checked my air/fuel at idle. It is surging up to 16-18 and then back to 13-15. I do believe that goes along with the excess exhaust air too.

I told them ngk plugs and they ended up putting in autolite. I told them again I want ngk can you please swap them, they said ok. I might have still ended up with the autolite plugs. I doubt they are seriously impacting it though. They are new and should be functioning correctly. I told them not to disable read o2 as well, just disable p0420. Likely, they didn't listen there either. It was my opinion that the rear o2 was important for more than detecting the cat.

 

get rid of the autolites man after i put ngk's in my car it ran sooooooooo much better

 

yeah, I don't know.. I told them twice, still I'll check and maybe just swap them myself. Assuming, they ignored 3 requests. I'll have to double check again what they put in when they are around tomorrow.

 

Our engines seem to start blowing up if your a\f ratio gose any high then 11.5! All the GM Performace guys I know say our motor should stay in the high 10s low 11s unless you change the pistons.

 

I went through third again tonight. I don't have enough places to test 1,2,4. It would be hard to keep stopping and launching with traffic. Also, can't hit 120 to max out 4 and see what happens or at least couldn't keep doing it to check.

I did run through third though... I noticed knock a good bit more. It actually stopped accelerating like pauses. Felt kind of like a belt slip does, but I gave it more gas and it smoothed back out. I was at like 85% throttle when it happened I went to 100% and it seemed to even out. I also have seen the knock hit 7.x in third, so I'm definitely trying to get some tech support from them on that issue. I know any knock is bad, but is there a scale to judge how severe? 7.x is fairly bad right?

 

I've had Stage 4 for almost a year now and haven't had any trouble. Car runs great! Just e-mail Todd or Scott and they will take care of you. They are a great company and will do anything to take care of the problem. Sorry to hear your having problems.

 

yeah, I know they will take care of it. I'm not bashing the company. It is just the holiday like I said. They are busy and might not be in the office much. They were great about everything so far. I just wanted some extra feedback. I need to explain to them better what I can since it is 300 miles away. It isn't like I can just drive there and show them. This helps me isoloate the issues and diagnose anything.

Also, when I say the 7.x knock it isn't to say look they messed up. I just don't know where to start worrying about driving safely before fixing it. I also was just curious how a scale would go for severity when looking at it. I wish I understood more of the specifics when looking at the numbers on my scan guage. All I know now it what shouldn't be there, but not why or how much = how bad.

 

If I remember correctly, the engine can only adjust to about 8* of knock. Which would mean your running pretty dangerous.

 

Wasn't trying to say you were bashing, just letting you know they will do their best to take care of it.

I understand about as much as you so I know why your worried. 7.x of knock is not good, just don't beat on it if an when you see knock. Thats about what I know.

 

the knock count can be adjusted, higher or lower. depends on the end user.
stock is 8 degree's.

 

Interesting. Drove it awhile today. Didn't get the error code at all. Maybe, the car is settling in still some. My problem today was with 11-13ish boost. The boost over 10 is dropping off real quick. If I'm only at 75% throttle the car starts cutting out and boost just drops. If I increase the throttle it jumps to 15-19 and boost stays up. Basically, the car now doesn't like it when you don't give it enough throttle.

I'm not sure why the boost goes down so fast. It will just fall instantly from 14 to 10 if you don't give it more gas (I mean it won't level out at the current speed). Makes it hard to drive in heavy traffic. It also is trying to stall higher in first. It won't run below 1900 without gas, used to be fine until 1100 or so.

 

not always the case.

cylinder temps dictate what a/f ratio you can run and make it live.

 

if i may interject

stop driving your car now, take it back to intense and get those levels squared off your knock is going to blow your motor. Seriously

also you need to get a performance exhaust on that bad boy like STAT ! Your building too much pressure at the manifold. Unless you have exhaust and didnt list it in your mods.

In summary

A dual pass heat exchanger and a performance exhaust should set you straight. Plus the ECU has to relearn all of this ****.

 

I'm doing the dual pass after I get this squared away. I just didn't have time to order and install it before the dynotune.

I have miss issue right now. I'm going to pull the plugs and check them. I have been keeping an eye on the knock. Intense contacted me back to ask about the problems. I'll see what else I learn. I started this morning to idle about 10 minutes of carbon out, so I got some shell gas even though it was a 20 minute drive. I want to rule gas out of the equation.

My supercharger also is making some added noise now. Have to listen real close with the hood open (ear almost against the casing). I'm really hoping the bearings didn't get harmed at some point during this. Again, I have confidense intense will help me out; however, I welcome any technical input or suggestion.