5 psi and it shuts down

[Sinister CO]

So I was just going over the various settings on my car, trying to make sure everything is looking good for the year. When I took it out for a spin and started to build boost, it just fell on its face at about 5 psi. There is a trouble code for low MAT readings. Would that be enough to cause this problem? I have a commander chip and thought I read somewhere that it ignored that sensor.

 

[larrym]

Are your couplers all secure?

 

[Sinister CO]

Yeah, everything is good and tight on the intake tract.

 

[John Larkin]

Is the wastegate tightened?

 

[dynoman]

Do you have a fuel pressure gauge ? What is base pressure ? Is FP rising 1 for 1 with boost ? Do you have a Scan Master ? We need more info to help.

 

[Sinister CO]

I will double check the waste gate tomorrow. It's 45 base rising as it should. I'm old school and have direct scan. I will get a log tomorrow and take a closer look.

 

[fastblackracing]

What condition is the turbo inlet hose and couplers in.....I have seen things get sucked shut
when the boost comes on and the compressor inlet pressure goes negative.

 

[Sinister CO]

It's all aluminum piping so I'm pretty sure I'm good there.

 

[TurboBuRick]

First thing that comes to mind is starving for fuel.

Is it possible the chip is in valet mode?

 

[Sinister CO]

No valet mode on this one. I'm picking up the new sensor after work so if the rain holds off I'll throw that on and see what happens.

 

[mikestertwo]

So I was just going over the various settings on my car, trying to make sure everything is looking good for the year. When I took it out for a spin and started to build boost, it just fell on its face at about 5 psi. There is a trouble code for low MAT readings. Would that be enough to cause this problem? I have a commander chip and thought I read somewhere that it ignored that sensor.

If it's setting the code for the MAT sensor then it is not ignoring it.

 

[Sinister CO]

I'm pleased to report that a new MAT sensor cured the problem.

 

[TurboBuRick]

Just curious, what chip are you running?

 

[Sinister CO]

It's the commander.