well the unit is in , but we are having issues totally expected
everything seems to work but we are not getting an airflow signal and the car is going into limp mode. because the ss has both map and maff sensors we installed the unit to the maf signal. we think this may be causing the issue so tonight we will try running it of the map sensor signal. we will keep you updated





Later
Ray

 

Is the goal to lean out the fuel mixture. In my dyno the A/F ratio was rather rich so leaning it out would probably get some more power and probably some more heat

 

our goal is to add more fuel more fuel means you can add more boost

 

and yes you are right from what i have seen the cobalts run rich unlike the RL which

 

...which...?

 

redlines run a little leaner than the cobalts

 

So once you get this figured out you can add more fuel....what's the point, unless you have found away around the EBPV?

 

the car will be getting a pulley monday, if the ebpv still keeps the boost low then we will figure out a way around it

 

I believe the solution for that is intercepting the MAP signal so the PCM doesn't try to lower the boost and physically modifying the vaccum operated part of the bypass valve not to open.

The bypass valve is use vacuum to open and close mechincally, however the PCM has a soleniod that can override the fuction and lower boost if needed.

Thats my theory. I think you need to intercept the MAF/MAP to get it just right and keep the PCM from going into limp mode.

 

I'm glad someone's got the time to roll up their sleeves and figure this stuff out for me. I'll be first in line to buy a kit from you if you can manage decent gains.

 

sorry but, I already said i would be the first. I think ray's gona be making tons of money tho!.

 

Ray at revitup is going to have so many customers if he can be the first one to provide decent gains because all of us have the itch to do sumtin crazy to our SS's. After watching that video for the exhaust over and over again i really cant wait til it is out and available so I can purchase it.

 

Rey, did you get my email?

 

It's a little more than that as the LSJ ECM uses "rationality checking" observing the relationship of mass-airflow, throttle opening and intake pressure (boost) at all times. A great many experienced people have been working on it now or over a year on the Redline with limited success. Often you think it's all good then it seems to find just the right combination of driving conditions and the MIL comes on and you're in "reduced power" mode until you cycle the ignition. Annoying little box!
WopOnTour

 

not loooking too hot, car keeps going into limp mode. we have our pulley here but cant proceed yet till we get the piggyback resolved

 

Yeah exactly. You can't just "clamp" a sensor and trick the ECU anymore like you could on earlier vehicles. Especially vehicles with ETC, the rationality diagnostics are WAY tighter/more sensitive largely for safety reasons. It would be a shame to "trick" the computer and have the car start accelerating on you randomly. The SS/Redline is too sophisticated for that.

 

anyone know what type of maf is on this car

 

does anyone know how to get ahold of some technical manuals?... maybe someone should check out their dealers if they have any connections.. i'll talk to the guys at my place around town

 

my wife works for caddilac but her techs say that they tried burning the disc but it wont work

 

thats basically the last peace of the puzzle right now we have power to the safc 2, have tach readings and tps and knock readings no mil's or engine reduce codes now we need to find the maf type

 

Try HELM inc at:
http://www.helminc.com/helm/Result.a...D7X0LHJVEF6GA6

That is where I got my Corvette manuals, basically the same thing the dealers use for helm is the provider for all GM publications. You can get the paper backs for $135.00

 

Ray i think thats deffinetly going to help you. I might get one myself

 

revitup > cobalts drive by wire


we figured a way around it
the best 3 am work night evar

 

yay. so do you have a estimated date on when we can expect numbers?

 

AFAIK
Pretty standard issue from GM/Delphi
-Heated element
-Wheatstone bridge
-A/D IC developing a 5V frequency modulated output proportional to airflow
-typical range 2kHz-10kHz

HTH
WopOnTour