Brief 'check engine' light blink
This has happened twice in the past week. I was driving along and my check engine light came on for about 1 second and the went off. Specifically, it was when I started driving, just got on the highway, and was in second or third gear. In other words, it was my first time through the gears on my way up to highway speeds.
The symptoms (minimall) -gas mileage in the low 20s. This doesn't bother me, I live 5 miles from work and all my cars have low gas mileage unless we go for a long trim. -rough idle. Again minimal. You cannot see it on the tach. I can feel it because I try to pay attention to these things. Passengers have never been able to notice Changes I have made in the last 3 months -change to all synthetic fluids (previous owner used petroleum based) Just changed the oil last week and thought I overfilled it a little. Let that out the next day. -K&N replacement filter -tranny filter and cooler installed -power steering o ring fix -rotated tires and painted center caps One of these two may be the culprit -resistor mod two weeks ago (replaced the resistor after one day) -last week, swapped ECUs from another '92. This one had the EPROM mod, tan resistor cut, and black one crushed. Mine had none of these. So, the check engine light makes me fear impending doom. I don't know where to start to look. The car runs great. Any advice would be greatly appreciated. Oh, nvrmore, did anything funny happen in the brief time you had this ECU in? Thanks |
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As for the light, could be a lot of things unfortunately. My guess would be a sensor that is starting to flake out. Mine is starting to do that as well however it will go on for a few minutes at a time. I'm guessing mine is an oxygen sensor. So this is where the big question comes out. Who wants to post the how-to on how to check the engine codes again?? :) I need them again too. :) Ryan |
To retrieve codes:
1) Remove the kick panel just beside the left foot rest on the driver's side. 2) Locate blue wires. 3) Locate black connector. Hold it notch up. 4) With ignition off, insert one of the wires into top row, 2nd pin from left. 5) Turn key to on position, but do not start the car. 6) Watch blinky check engine light on dashboard. Count blinks. Long blinks = 10, Short blinks = 1. 7) Keep watching blinky light until you get mesmorized. :D You may want to clear codes to make sure that old codes are removed from system before determining problem. I would personally read codes now, clear the codes, then wait until the CE light comes on again to retrieve the codes. To clear codes: 1) With engine off, stick the blue wires to 1st and 2nd pin in the top row counting from left on the black connector, with notch facing up. 2) Start car. Shut off car. Remove pins. 3) Read codes to make sure they are clear. No codes = steady blinks at 1/4 second intervals. Clear as mud? :D Those that require pics, I can take them when I get back into Toronto on Monday. VK I miss my SVX. |
We have a winner! Now for the grand prize, provide a listing of the codes themselves and how they equate to blinking lights.... :D
Ryan |
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As for 'feeling' a rough idle, I used to swear my SVX did the same thing. I started buying gas from a different station - I suspect that the discount station I was going to was mixing octane ratings. You are putting in premium fuel, right? My guess is going to be that you need to replace one or both of your exhaust O2 sensors. 90% of the time that I've had a 'check engine' light come on in any of my cars was due to a faulty O2 sensor. That could also cause your poor mileage or rought idle. |
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Will the O2 sensor show up as one of the ECU codes? |
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-- 1988 and Later Models with Multi-Point Fuel Injection -- CODE PROBABLE CAUSE 11 Crank Angle Sensor or Circuit 12 Starter Switch or Circuit 13 Cam Position Sensor or Circuit (TDC Sensor on Justy) 14 Fuel Injector No. 1 (Legacy, Impreza, Justy, SVX) 14 Fuel Injector No. 1 and 2 (XT, Loyale, GL, DL) 15 Fuel Injector No. 2 (Legacy, Impreza, Justy, SVX) 15 Fuel Injector No. 3 and 4 (Loyale, GL, DL) 15 Fuel Injector No. 5 and 6 (XT-6) 16 Fuel Injector No. 3 (Legacy, Impreza, Justy, SVX) 16 Fuel Injector No. 3 and 4 (XT) 17 Fuel Injector No. 4 (Legacy, Impreza, SVX) 17 Fuel injector No. 1 and 2 (XT-6) 18 Fuel Injector No. 5 (SVX) 19 Fuel Injector No. 6 (SVX) 21 Coolant Temperature Sensor or Circuit 22 Knock Sensor or Circuit (Right Side on SVX) 23 Air Flow Meter or Circuit (Exc. Justy) 23 Pressure Sensor (Justy) 24 Air Control Valve or Circuit (Exc. Justy) 24 Idle Speed Control Solenoid Valve (Justy) 25 Fuel injector No. 3 and 4 (XT-6) 26 Air Temperature Sensor (Justy) 28 Knock Sensor No. 2 (SVX, Left Side) 29 Crank Angle Sensor (SVX, No. 2) 31 Throttle Position Sensor or Circuit 32 Oxygen Sensor or Circuit (No. 1, Right Side, On SVX) 33 Vehicle Speed Sensor (VSS) or Circuit 34 EGR Solenoid or Circuit 35 Purge Control Solenoid or Circuit 36 Air Suction Solenoid Valve (Impreza) 36 Ignitor Circuit (Justy) 37 Oxygen Sensor (No. 2, Left Side, On SVX) 38 Engine Torque Control (SVX) 41 Air/Fuel Adaptive Control 42 Idle Switch or Circuit 43 Throttle Switch (Justy) 44 Wastegate Duty Solenoid (Turbo Models) 45 Pressure Sensor Duty Solenoid (Turbo Models) 45 Atmospheric Pressure Sensor or Circuit (Non- Turbo Models) 49 Airflow Sensor 51 Neutral Switch (Manual Transmission Models) 51 Inhibitor Switch (Automatic Transmission Models) 52 Parking Brake Switch (Exc. Justy) 52 Clutch Switch (Justy) 55 EGR Temperature Sensor or Circuit 56 EGR System 61 Parking Brake Switch (Loyale) 61 Fuel Tank Pressure Control Solenoid (Impreza) 62 Fuel Temperature Sensor (Impreza) 62 Electric Load Signal (Justy) 63 Fuel Tank Pressure Sensor (Impreza) 63 Blower Fan Switch (Justy) 65 Vacuum Pressure Sensor VK |
how to
Randy, how about moving the codes & procedure to "how to"?, if it's ok with VK:)
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Re: how to
Those aren't MY instructions. They're merely my regurgitation of other sources of information. :D
As for the codes, those I found from the alt.autos.subaru newsgroup. Sure, why would I mind? VK Quote:
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Try this: |
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I've scanned all three pages of the manual regarding the codes and will drop them into a folder in the How-to locker. Meanwhile, VK, you've been absent for a while. Good to see you back. :D |
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