HI,

Just had my heater matrix replaced in my 95 wrx saloon and when i got the car back the engine was ........ in big trouble. I could barely keep it running, and the check engine light was flashing.

IdeaS?

Thanks

 

You need to read the error code from the ecu, but worth resetting the ecu first..

ECU Reset and Error codes

Turn OFF the ignition

Connect Error code Connectors and Test Mode Connectors : 2 black connectors under dash, connect black to black and 2 green connectors under dash, connect green to green, they are by your left knee when sat in the drivers seat and often taped back to the loom if they haven't been used before.

Turn ON ignition but doesn't start the engine

Engine Check lamp comes on

Press accelerator pedal to the floor

Then return it to the half-throttle position and hold it there for two seconds

Release foot off the pedal completely

Start the engine

Check engine light error code is indicated by Pulsing lamp

If an error is detected then Check ECU Code

If no error is detected - drive the car sensible for a couple of minutes
i.e. until warm (do not use boost or high rpm!)

When the ECU has been reset the Check Engine Light will flash

An Error Code is indicated by a flashing check engine light of varying length of flash, a flash of around once a second is the okay code and indicates all is well.

If an error code is detected Check the ECU Code

Turn ignition OFF and Disconnect Connectors

If there is a fault Check the Appropriate Sensor

Error Codes

An Error code is defined as a slow flash followed by fast flash i.e 2 slow and 3 fast = 23 Mass Airflow sensor.
A continuous on/off at the same speed is no fault found.

Code Fault
11 Crankshaft position sensor

12 Starter switch

13 Camshaft position sensor

21 Engine coolant temperature sensor

22 Knock sensor

23 Mass air flow sensor

24 Idle air control solenoid

31 Throttle position sensor

32 Oxygen sensor

33 Vehicle speed sensor 2

35 Purge control solenoid valve

42 Idle switch

44 Wastegate control solenoid valve

45 Pressure sensor –Pressure exchange solenoid valve

51 Neutral position switch

Simon

 

ok, so mine is continuous on/off. I haven't connected any wires yet ( although i have no idea whatthe garage did ) but the engineis still crappy. it cant seem to find the idle speed........ nearly cuts out wheni put my foot on accel.... then races.

Will removing the ECU and replacing also reset it?

Thanks

 

Check what Simon suggests, I would also check that the garage have fully connected / pushed home any connectors especially the air flow meter which they might have unplugged during the work.

Andrew

 

sounds like the garage have mistakenly plugged the "green" diagnostic plugs together after having the dash out to sort the matrix...................

under the drivers side just near the steering column............

alyn

 

was that the problem?

 

so the saga continues............

the garage have had my car for 7 weeks, and they cant fix it.

Anyway, NOW the check engine light is flashing 3 long and 3 short. From the previous post that look slike the speed sensor no. 2? Where is that? Any ideas? Actual perfomance is much better but ultuimately seems to lacking a bit of grunt in the higher rev range.

Thanks in advance

 

mounted on the gearbox.