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Old 03-07-2013, 09:37 PM   #1
Scooby Newbie
Member#: 231953
Join Date: Dec 2009
Location: Sacramento, CA
2002 WRX

Default Weird Boost Spike

The other day I was driving a drunk friend home and had to pull over to the side of the road for.. emergency evacuation.. so my car spent a good amount of time idling that night.

So I finally get the guy home and I'm pulling onto the freeway and my boost gauge spiked up to ~29 PSI and the needle was jumping around a bit as I drove at a constant speed. When I pulled over I didn't see any smoke. The car seemed to drive fine after that but I avoided boost just to be safe.

Fast forward to today, I decide to datalog with my AP and strangely everything seemed completely normal-- boost gauge seemed accurate (wasn't bouncing around), and the car had no problem pulling on some ~50% throttle runs.

Unforunately, I didn't think about updating my AP firmware so it is using some older parameters. Hopefully there's enough to see if anything is wrong. On datalog9 I tried to go WOT but had to let off really fast because I saw a black Ford front end poking around a corner haha.




Car is running Stage 1 Cobb OTS map, all stock aside from K&N filter, Perrin silicone intercooler Y-pipe, and Greddy Evo2 catback.

Does anything look wrong?
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Old 03-09-2013, 01:50 AM   #2
mod maniac
Scooby Specialist
Member#: 300551
Join Date: Nov 2011
Chapter/Region: SCIC
Location: mariposa ca.
2002 FOZ STI 2.34
Fullers Garage


If it is all stock running the td04I don't think you could make 29 psi. You also should have hit fuel cut if you did.
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Old 02-01-2017, 08:17 AM   #3
Scooby Newbie
Member#: 444113
Join Date: Apr 2016

I'm having same issues any solution?
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