[JZ oo7]

last night i was doing a WOT run through the l tunnel that i take before i get home. i noticed something horribly different coming from the intake. it happens after about 4.5k rpm. sounded like a plastic bag or something was in the way of my intake. car started choking, and it made a shuddering sound. feels kinda like how the rev limiter feels like. did it in every gear at almost the same RPM. i did not try it 5th gear. pulled over, pop the hood and checked the intake. it was clean, nothing blocking it. did the run again, and same sounds occured. never has happened before. i have a cone filter in replace of the stock flat panel filter with open hood scoop. got a stromung muffler. ECU was resetted about 4 months ago. had WOT runs during the 4 months too. temperature at the tunnel last night was warmer than before, maybe mid to high 70s with about 40% humidity. anyone knows what is going on? thanks in advance.

jz

 

[JZ oo7]

oh yea, car has about 27,000 miles. spark plugs nor spark plug wires has been changed yet. should be chaning those soon. and i'm on Mobil 1, 5-30 synthic oil.

jz

 

[Boy]

Sounds like safe mode. What MY do you have? Do you have a CEL? Have you pulled the code (go to Autozone)? This info will be helpful diagnosing the problem. You may have killed a MAF (if you've got a 98-99) or an O2 sensor (any year). Other things to look for are: check the coil pack, take off the plug wires if the terminals aren't relatively shiney then you may have killed the coil. Check the ends of the plugs wires for signs of corrosion/breakage. Pull your spark plugs and look at the electrode for signs of damage (fouling, lean/rich conditions, etc). You may want to reset the ECU to see if you can fool it into thinking the problem is gone (probably only last a day or so) at least to get you to and from work/dealer. All of the parts are easy DIY replacements so be very wary of dealer install prices. IF its within your budget cool, if not don't sweat it. Get the code pulled (assuming CEL) and we can start from there.

 

[Boy]

Thought this might help too...

Subaru OBD2 Codes
P0031
Front oxygen (A/F) sensor heater circuit low input

P0032
Front oxygen (A/F) sensor heater circuit high input

P0037
Rear oxygen sensor heater circuit malfunction

P0038
Rear oxygen sensor heater circuit high input

P0065
Air assist injector solenoid valve malfunction

P0066
Air assist injector solenoid valve circuit low input

P0067
Air assist injector solenoid valve circuit high input

P0100
Mass Air Flow Sensor Circuit Malfunction

P0101
Mass Air Flow Sensor Circuit Range Problem

P0102
Mass Air Flow Sensor Circuit Low Input

PO103
Mass Air Flow Sensor Circuit High Input

P0105
Pressure Sensor Circuit Malfunction

P0106
Pressure Sensor Circuit Range Problem

PO107
Pressure Sensor Circuit Low Input

PO108
Pressure Sensor Circuit High Input

P0111
Intake air temperature sensor circuit range/performance problem

P0112
Intake air temperature sensor circuit low input

P0113
Intake air temperature sensor circuit high input

P0115
Engine Coolant Temperature Sensor Circuit

P0116
Engine Coolant Temp Sensor Circuit Low Input

PO117
Engine Coolant Temp Sensor Circuit Low Input

PO118
Engine Coolant Temp Sensor Circuit High Input

P0120
Throttle Position Sensor Circuit Malfunction

P0121
Throttle Position Sensor Circuit Range Problem

PO122
Throttle Position Sensor Circuit Range Problem

PO123
Throttle Position Sensor Circuit High Input

P0125
Insufficient Coolant Temperature for Closed Loop

P0128
Thermostat malfunction

P0130
Front Oxygen Sensor Circuit Malfunction

P0131
Front oxygen (A/F) sensor circuit range/performance problem (low input)

P0132
Front oxygen (A/F) sensor circuit range/performance problem (high input)

P0133
Front Oxygen Sensor Circuit Slow Response

P0135
Front Oxygen Sensor Heater Circuit Malfunction

P0136
Rear Oxygen Sensor Circuit Malfunction

P0139
Rear Oxygen Sensor Circuit Slow Response

P0141
Rear Oxygen Sensor Heater Circuit Malfunction

P0170
Fuel Trim Malfunction

P0171
Fuel trim malfunction (A/F too lean)

P0172
Fuel trim malfunction (A/F too rich)

PO181
Fuel Temperature Sensor A Range Problem

PO182
Fuel Temperature Sensor A Circuit Low Input

PO183
Fuel Temperature Sensor A Circuit High Input

P0201
Fuel Injector Circuit Malfunction - #1

P0202
Fuel Injector Circuit Malfunction - #2

P0203
Fuel Injector Circuit Malfunction - #3

P0204
Fuel Injector Circuit Malfunction - #4

P0244
Wastegate control solenoid valve malfunction (high input)

P0245
Wastegate control solenoid valve circuit low input

P0246
Wastegate control solenoid valve circuit high input

PO261
Fuel Injector Circuit Low Input - #1

PO262
Fuel Injector Circuit High Input - #1

PO264
Fuel Injector Circuit Low Input - #2

PO265
Fuel Injector Circuit High Input - #2

PO267
Fuel Injector Circuit Low Input - #3

PO268
Fuel Injector Circuit High Input - #3

PO270
Fuel Injector Circuit Low Input - #4

PO271
Fuel Injector Circuit High Input - #4

P0301
Cylinder 1 Misfire Detected

P0302
Cylinder 2 Misfire Detected

P0303
Cylinder 3 Misfire Detected

P0304
Cylinder 4 Misfire Detected

P0325
Knock Sensor Circuit Malfunction

P0327
Knock sensor circuit low input

P0328
Knock sensor circuit high input

P0335
Crankshaft Position Sensor Circuit Malfunction

PO336
Crankshaft Position Sensor Circuit Range Problem

P0340
Camshaft Position Sensor Circuit Malfunction

PO341
Camshaft Position Sensor Circuit Range Problem

P0400
Exhaust Gas Recirculation Flow Malfunction

P0403
Exhaust Gas Recirculation Circuit Malfunction

PO420
Catalyst System Efficiency Below Threshold

PO440
Evaporative Emission Control System Malfunction

P0441
Evap System Incorrect Purge Flow

P0442
Evaporative emission control system malfunction

P0443
Evap System Purge Control Valve Circuit

PO443
EVAP System Purge Control Valve Circuit Low Input

P0444
Evaporative emission control system purge control valve circuit low input

P0445
Evaporative emission control system purge control valve circuit high input

PO446
EVAP System Vent Control Low Input

P0447
Evaporative emission control system vent control low input

P0448
Evaporative emission control system vent control high input

PO451
EVAP Pressure Sensor Range Problem

PO452
EVAP Pressure Sensor Low Input

PO453
EVAP Pressure Sensor High Input

P0456
Evaporative emission control system malfunction

PO461
Fuel Level Sensor Circuit Range/Performance Problem

PO462
Fuel Level Sensor Circuit Low Input

PO463
Fuel Level Sensor Circuit High Input

P0464
Fuel level sensor intermittent input

P0480
Cooling Fan Relay 1 Circuit Low Input

P0483
Cooling Fan Function Problem

P0500
Vehicle Speed Sensor Malfunction

P0505
Idle Control System Malfunction

P0506
Idle Control System RPM Lower Than Expected

P0507
Idle Control System RPM Higher Than Expected

P0509
Idle control system circuit high input

P0512
Starter switch circuit high input

P0545
Exhaust gas temperature sensor circuit low input

P0546
Exhaust gas temperature sensor circuit high input

P0600
Serial Communication Link Malfunction

P0601
Internal Control Module Memory Checksum Error

P0604
Internal control module memory check sum error

P0703
Brake Switch Input Malfunction

P0705
Transmission Range Sensor Circuit Malfunction

P0710
Transmission Fluid Temperature Sensor Circuit

P0715
Torque Converter Turbine Speed Sensor Circuit Malfunction

P0720
Output Speed Sensor Circuit Malfunction

P0725
Engine Speed Input Circuit Malfunction

P0731
Gear 1 Incorrect Ratio

P0732
Gear 2 Incorrect Ratio

P0733
Gear 3 Incorrect Ratio

P0734
Gear 4 Incorrect Ratio

P0740
Torque Converter Clutch System Malfunction

P0741
Torque converter clutch system malfunction

P0743
Torque Converter Clutch System Electrical

P0748
Pressure Control Solenoid Electrical

P0753
Shift Solenoid A Electrical

P0758
Shift Solenoid B Electrical

P0760
Shift Solenoid C Malfunction

P0763
Shift Solenoid C Electrical

P0778
2-4 brake pressure control solenoid valve (2-4 brake duty solenoid) circuit malfunction

P0785
2-4 brake timing control solenoid valve (2-4 brake timing solenoid) circuit malfunction

P1086
Tumble generator valve #2 (LH) position sensor circuit low input

P1087
Tumble generator valve #2 (LH) position sensor circuit high input

P1088
Tumble generator valve #1 (RH) position sensor circuit low input

P1089
Tumble generator valve #1 (RH) position sensor circuit high input

P1090
Tumble generator valve #1 (RH) malfunction (stuck open)

P1091
Tumble generator valve #1 (RH) malfunction (stuck close)

P1092
Tumble generator valve #2 (LH) malfunction (stuck open)

P1093
Tumble generator valve #2 (LH) malfunction (stuck close)

P1094
Tumble generator valve circuit #1 (open circuit)

P1095
Tumble generator valve circuit #1 (over current)

P1096
Tumble generator valve circuit #2 (open circuit)

P1097
Tumble generator valve circuit #2 (over current)

P1100
Starter Switch Circuit Malfunction

P1101
Neutral Position Switch Circuit High Input (A/T)

P1101
Neutral Position Switch Circuit Malfunction (M/T)

P1102
Pressure Sources Solenoid Valve Circuit Malfunction

P1103
Pressure Sources Switching Solenoid Valve Circuit

P1104
Engine Torque Control Signal Circuit Malfunction

P1106
Engine Torque Control Signal 2 Circuit Malfunction

P1110
Atmospheric pressure sensor low input

P1111
Atmospheric pressure sensor high input

P1112
Atmospheric pressure sensor range/performance problem

P1115
Engine Torque Control Cut Signal Circuit High Input

P1116
Engine Torque Control Cut Signal Circuit Low Input

P1120
Starter Switch High Input

P1121
Neutral Position Switch Circuit High Input [MT Vehicles]

P1121
Neutral Position Switch Circuit Low Input [AT Vehicles]

P1122
Pressure Sources Switching Valve Circuit High Input

P1124
TCS Signal Circuit High Input

P1130
Front oxygen sensor circuit malfunction (open circuit)

P1131
Front oxygen sensor circuit malfunction (short circuit)

P1134
Front oxygen (A/F) sensor microcomputer problem

P1137
Front oxygen (A/F) sensor circuit range/performance problem

P1139
Front oxygen (A/F) sensor #1 heater circuit performance/range problem

P1141
Mass Air Flow Sensor Circuit High Input

P1142
Mass Air Flow Sensor Circuit Low Input

P1143
Pressure Sensor Circuit Low Input

P1144
Pressure Sensor Circuit High Input

P1146
Pressure sensor circuit range/performance problem (high input)

P1150
Front Oxygen Sensor Heater Circuit High Input

P1151
Rear Oxygen Sensor Heater Circuit High Input

P1230
Fuel pump control unit malfunction

P1244
Wastegate control solenoid valve malfunction (low input)

P1245
Wastegate control solenoid valve malfunction (fail-safe)

P1301
Fire due to increased exhaust temperature

P1312
Exhaust temperature sensor malfunction

P1325
Knock Sensor Circuit Low Input

P1400
Fuel Tank Pressure Control Solenoid Low Input

P1420
Fuel Tank Pressure Control Solenoid High Input

P1421
Exhaust Gas Recirculation Circuit High Input

P1422
EVAP Purge Control Valve Circuit High Input

P1423
EVAP Vent Control High Input

P1440
Fuel Tank Pressure Control System Low Input

P1441
Fuel Tank Pressure Control System High Input

P1442
Fuel Level Sensor Circuit Range/Perf


P1443
EVAP Control System Vent Control Function Problem

P1480
Cooling fan relay 1 circuit high input

P1500
Radiator Fan Relay 1 Circuit Malfunction

P1501
Idle Control System Malfunction (Fail Safe)

P1502
Radiator Fan Function Problem

P1507
Idle Control System Malfunction (Fail Safe)

P1510
Idle Air Control Solenoid Signal 1 Circuit Low Input

P1511
Idle Air Control Solenoid Signal 1 Circuit High Input

P1512
Idle Air Control Solenoid Signal 2 Circuit Low Input

P1513
Idle Air Control Solenoid Signal 2 Circuit High Input

P1514
Idle Air Control Solenoid Signal 3 Circuit Low Input

P1515
Idle Air Control Solenoid Signal 3 Circuit High Input

P1516
Idle Air Control Solenoid Signal 4 Circuit Low Input

P1517
Idle Air Control Solenoid Signal 4 Circuit High Input

P1518
Starter switch circuit low input

P1520
Radiator Fan Relay 1 Circuit High Input

P1540
Vehicle Speed Sensor Malfunction 2

P1544
High exhaust temperature detected

P1560
Back-Up Voltage Circuit Malfunction

P1590
Neutral position switch circuit high input

P1591
Neutral position switch circuit low input

P1592
Neutral position switch circuit (MT model)

P1594
Automatic transmission diagnosis input signal circuit malfunction

P1595
Automatic transmission diagnosis input signal circuit low input

P1596
Automatic transmission diagnosis input signal circuit high input

P1698
Engine torque control cut signal circuit low input

P1699
Engine torque control cut signal circuit high input

P1700
Throttle Position Sensor Circuit Malfunction (A/T)

P1701
Cruise Control Set Signal Circuit Malfunction (A/T)

P1702
Auto Trans Diagnosis Input Signal Circuit

P1703
Low clutch timing control solenoid valve circuit malfunction

P1704
2-4 Brake Timing Solenoid Valve Circuit Malfunction

P1705
2-4 Brake Pressure Solenoid Valve (Solenoid D) Circuit

P1711
Engine torque control signal 1 circuit malfunction

P1712
Engine torque control signal 2 circuit malfunction

P1722
Auto Trans Diagnosis Input Signal High Input

P1742
Auto Trans Diagnosis Input Signal Malfunction

 

[JZ oo7]

nope, i don't have a CEL on. i thought it would go on, but it didn't. will check my spark plugs later. thanks for the input.

jz

 

[iBlueVirus]

you car is going to die man... just get rid of it and i'll take it off your hands for $20.

 

[JZ oo7]

Leo, NO! :lol:

jz

 

[iBlueVirus]

man, I am just trying to help you out. Alright, fine, $20.01. But that is the highest I can go! :lol: Is it still doing it? Were you low on gas? I had something similar, but only when I was at autox coming out of a sharp turn.

 

[JZ oo7]

yup, still doing that. and it's not gas starvation. it's starting to get worst now. only does it when i'm at WOT. might reset my ECU, see if that helps. if problem is still there, gonna put my stock airbox back in and bring it back to subaru.

jz

 

[iBlueVirus]

dude bring it to Santa Cruz Subaru and we can chill! Let me know bro!

 

[JZ oo7]

yea, i'm thinking about bringing it back to subaru. i just don't know if i should keep my ghetto filter on or replace it with the stock filter box. hmmmm...

jz

 

[iBlueVirus]

doesn't take that long... just replace it and go

 

[JZ oo7]

i gotta dig for my stock plumbing

jz

 

[iBlueVirus]

or you know what you could do? bring the stock intake but don't change it. if they don't have to touch it, they don't care.

 

[JZ oo7]

they might actually have to touch the stock intake. god damn it. i don't wanna drive so far! oh well. wonder where in SC that i can bring them along and have some WOT runs, so i can show them what's going on.

jansen

 

[iBlueVirus]

there are few spots around and they know them too. don't worry, just bring the sucka in!

 

[JZ oo7]

haven't been to SZ subaru in a long long time

jz

 

[iBlueVirus]

so did you reset the ecu?

 

[JZ oo7]

nope, haven't had a chance to yet.

jansen

 

[iBlueVirus]

should try that before you bring it in. it MIGHT save you a trip