Hi everyone,
I'm a new member of WRX Tuners. I'm in Colorado and need help diagnosing a lag issue.
My car is a 2002 WRX Sedan.
Performance mod list:
JDM EJ205
ID 1000 Injectors with IAG rails
Fuel pressure regulator
VF30
Grimmspeed uppipe
Borla header
Cobb downpipe, cold air, boost control
Apexi exhaust
Process west top mount
Gfb mach 2 diverter
255 walbro pump
Problem:
I got a custom tune for my car.
Day 1: It was running great, 18-19psi at 3,000rpm. I drove it conservatively and did one 2nd gear pull to try everything out. I know you're supposed to wait and "break in" a new tune.
Day 2: I try a 3rd gear pull, psi was great then I hit 4,000rpm, loud pop happens in the engine bay and boost drops. At first I thought I blew the engine so I pull off and take a look. No smoke so I start the car up again and everything runs fine (this was 4 days ago). I try to accelerate again and that's where the problem lies, all of the gears have the same lag: 3,000rpm = 3psi 4,000rpm = 10psi 5,000rpm = 18-19psi
The past 4 days have been a thorough check of everything on the car.
We did a vacuum leak test, all hoses checked out and all connections were solid.
We put the air compressor on the end of the exhaust to see if there was a blown gasket or something like that on the back end. There was an uppipe and header leak, that was re-torqued but didn't change anything.
We will be checking the wastegate tomorrow.
If anyone has had a similar experience or could explain the loud popping in the engine bay and boost lag that would be extremely helpful.
Thanks!
- Sean
I'm a new member of WRX Tuners. I'm in Colorado and need help diagnosing a lag issue.
My car is a 2002 WRX Sedan.
Performance mod list:
JDM EJ205
ID 1000 Injectors with IAG rails
Fuel pressure regulator
VF30
Grimmspeed uppipe
Borla header
Cobb downpipe, cold air, boost control
Apexi exhaust
Process west top mount
Gfb mach 2 diverter
255 walbro pump
Problem:
I got a custom tune for my car.
Day 1: It was running great, 18-19psi at 3,000rpm. I drove it conservatively and did one 2nd gear pull to try everything out. I know you're supposed to wait and "break in" a new tune.
Day 2: I try a 3rd gear pull, psi was great then I hit 4,000rpm, loud pop happens in the engine bay and boost drops. At first I thought I blew the engine so I pull off and take a look. No smoke so I start the car up again and everything runs fine (this was 4 days ago). I try to accelerate again and that's where the problem lies, all of the gears have the same lag: 3,000rpm = 3psi 4,000rpm = 10psi 5,000rpm = 18-19psi
The past 4 days have been a thorough check of everything on the car.
We did a vacuum leak test, all hoses checked out and all connections were solid.
We put the air compressor on the end of the exhaust to see if there was a blown gasket or something like that on the back end. There was an uppipe and header leak, that was re-torqued but didn't change anything.
We will be checking the wastegate tomorrow.
If anyone has had a similar experience or could explain the loud popping in the engine bay and boost lag that would be extremely helpful.
Thanks!
- Sean