Cuz I've definitely lost it. I've got the AEM truboost and I noticed since my coil replacement episode that I'm not gettin my full 9.3-9.6 PSI... I noticed my missing 30ish horsepower on the highway and then noticed my PSI wouldn't go over 8.3.

I gave it a day or two and ripped it open all the way through third.. after the run i consulted the gauge for the max it read... gave me the

"HI.... 8.7" Which was better, but I would never boost under 9... I'd go to 10 before I'd underboost.


The beginning of the end? Back to the motor build shopping list?

 

It's been 90+ degrees all summer. I mean the 10psi was when it was definitely cooler. But I've been in high 9psi in the high 90's for 100% sure.

 

nice thread title sorry bout your problems as of late

 

I know a motor build would fix all this crap- but I really just wanna keep it running well in the mean time if possible :/

Thanks for the regards.

 

You gain over 30whp on just 1psi?

 

Just guessing- I'm probably not far off on a TT set up, it was REALLY noticeable.

 

why not just turn up the boost controller?

 

is your AFR still the same?

maybe a boost leak somewhere?

 

How are you regulating boost? Duty cycle or closed loop feedback? I'm not familiar with the AEM unit. What EMS?

 

That sounds like a horrible idea actually.

Unlikely its a leak. I did check it and reconnect everything just in case though. Doesn't sound, look or feel like one ( I've had several )

HKS:iS EMU

 

i can easily see over 1-2psi difference between days of varying temps.

Whats the wastegate spring pressure?

Boost can be down if there's a leak or its significantly hotter outside. both of which you said cannot be. so that means your wastegate isnt working right. Sure you didnt burn a hole thru your wastegaet vaccuum line?

i guess you cant log IAT or boost can you? If you can, up the boost and watch the IAT's.

 

I'm down to like 7.5 psi-- anyone got a freaking PDF for AEM tru boost? It's gotta be this stupid thing.

 

is there a way to reset the AEM gauge? not very familiar w/ it

although if you feel the loss in power, unless its a mental thing

 

No- You loose 1psi you can feel it

You loose 2 you WILL feel it.

I need the PDF manual or something.