which tunes on gryphon?

[bigsakius]

thanks Cody, ya I think I will stick with the 40tow and 100 race. Although I have to figure out first why I am only boosting 10lbs on stock setting. Also do you know if pegasus will run on windows 7

[cleatus12r]

I couldn't tell you about Windows 7. I assume it works on the same basis as Vista.

As far as your boost issue goes.......

You either have a dirty air filter or a restriction to the compressor inlet.....
OR
you have a boost leak somewhere between the turbo compressor outlet and the intake manifolds.......
OR
you have a hole in your boost line to your gauge......
OR
you have a turbine drive pressure leak in your exhaust system between the exhaust manifolds and turbine inlet......


My educated guess is that you are either losing boost through a loose intercooler pipe boot or drive pressure at the turbine inlet junction where the exhaust pipes run up the back side of the engine. Both of these are very common issues.

Spotting an exhaust leak is very easy. Use a flash light to look up behind the engine towards the back of the turbocharger. You'll see witness marks (soot) where the exhaust pipes merge into the "y" of the turbine inlet. The driver's side is a lot easier to see than the passenger side but it can be done.

For the intake side, use a deep-well 11mm or 7/16" socket and some long extensions to tighten the four clamps on the intercooler pipe boots at the intercooler junctions and lose the extensions to do the four clamps at the compressor outlet and intake "y".

Use an 8mm or 5/16" socket to tighten all four clamps on the orange boots at the intake manifolds below the intake "y".

Let us know how it goes.

[bigsakius]

well i did a quick troubleshooting to see if I would get more boost by unplugging the red wire that attaches to the wastegate. I still have not run her too hard due to the feet of snow we have all over the place but a quick stabb on the accelorator and I was able to reach 15lbs of boost. I am not sure where to look from here but I guess there maybe a leak somewhere. Before I bought the truck there was a new turbo installed so I wonder if they put that on correctly? I also scanned the truck with the gryphon and 4 codes did pop up although no check engine light. I will go read those in a little bit.
Thanks for the help btw

[bigsakius]

ok here are the codes I got,

P0232, P0603, P0478, and P0470.

I know the 0603 is due to the tuner, and the last two are with the exhaust pressure sensor. I am wondering if that could be the reason for the low boost and bad mpg. Or could it be the fuel pump. Truck seems to run fine to me though hmm

[cleatus12r]

P0470- Exhaust backpressure circuit malfunction
Open or shorted wiring/sensor.

P0478- Exhaust backpressure too high under normal driving conditions.
Stuck shut or partially shut exhaust backpressure valve or shorted EBP sensor.

P0232- Fuel pump relay driver failed off.
Voltage detected on fuel pump monitor circuit when pump was commanded off.