backfire on stock bypass valve?

Heads, valves, pistons, rods, crankshaft, etc...

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DasBoost
In Neutral
Posts: 32
Joined: Tue Jun 17, 2008 3:29 am
Location: Cheyenne, Wyoming

backfire on stock bypass valve?

Post by DasBoost »

Why would my car backfire between the 1-2, 2-3 shift with more than 3/4 go pedal depressed. Running 13 pounds boost with 2.5 inch turbo back/ catless exhaust and wrx intercooler.
PhilSine
First Gear
Posts: 63
Joined: Wed Jul 02, 2008 8:40 pm
Location: Superior, WI

Post by PhilSine »

Backfire out the exhaust?

Also, are you recirculating back into the intake or venting to atmosphere?
91 Legacy SS
98 OBS-T
DasBoost
In Neutral
Posts: 32
Joined: Tue Jun 17, 2008 3:29 am
Location: Cheyenne, Wyoming

Post by DasBoost »

intake
PhilSine
First Gear
Posts: 63
Joined: Wed Jul 02, 2008 8:40 pm
Location: Superior, WI

Post by PhilSine »

Are you sure the BPV is working at all?

When our cars don't recirc like they should the result is that they run very rich especially at 3/4 throttle.
91 Legacy SS
98 OBS-T
i_c_the_light
First Gear
Posts: 80
Joined: Sat Dec 30, 2006 4:03 am
Location: New Zealand

Post by i_c_the_light »

It has happened to me a couple of times.
1990 Legacy GT wagon. 100% JDM, 100% factory.
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