cogin

just changed the back box and have now got a couple of faults on the ecu, 45 and 23, presure sensor and MAF, do i try an ecu reset or stick the std box back on??

cogin

had a moment there when i thought id got it, nope, runs fine when cold with CEL on and above faults, when hot will tick over roughly, going between 600 and 1100 rpm but cant drive with revs over 4000, unplug MAF when running, no change!!!

Its Knakered aint it.

wrxgreen

i can see how changing just the back box causing a ecu fault like that

cogin

would it cause it or just hilight an existing one, the CEL was'nt on when i started!!

DannyBoy007

iTrader: (7)

it's gone into limp mode, I wouldn't drive it, I can't see changing the back box would of changed a great deal, as said it might of just highlighted the fact it was knackered maf in the first place.

Disconnect the battery, this will clear all of the codes, and then do a diginostic, this will show current fault codes.

Have a a chat with David at API, He'll be able to sort you out and answer any question you have, there isn't anything about these cars he doesn't know and he'll ship the goods for next day delivery

pippyrips

agree with Danny - the backbox and cel light happening at the same time is more than likey coincidence. Sounds more like an underlying problem unfortunately

cogin

Oh well, why must i fiddle, thanks guys

cogin

ok, action plan, i've disconected the battery, gonna put std b/box back on the car, then we will see what fault codes we've got, then phone David at API,

I am so far into the dog house that even the dog won't look me in the eye!!

Should have left alone, then the car would have broke down on the way to the airport, at least it would not have been my fault

turboDean

iTrader: (4)

List of fault Codes from the PSI3 manual:

DIGIT NON EOBD FAULT CODES
NOTE: Some codes are duplicated and therefore have multiple meanings
24 Idle Control System Malfunction
23 Mass Air Flow Sensor Circuit
22 Knock Sensor
21 Engine Coolant Temperature Sensor
18 Electrical Load Signal
13 Camshaft Position Sensor
12 Starter Signal
11 Crankshaft Position Sensor
37 Rear O2 Sensor Circuit / A/F Sensor Circuit Malfunction
35 CPC System
33 Vehicle Speed Sensor
32 Oxygen Sensor
31 Throttle Position Sensor Circuit
29 Crankshaft Position Sensor 2
28 Knock Sensor #2
26 Intake Air Temperature Sensor
45 Pressure Sensor
44 Turbocharging Pressure Control Signal
43 Accelerator Pedal Switch
42 Idle Switch
39 Traction Control System
38 Torque Permission Signal
38 Torque Control Signal #2
38 Torque Control Signal #1
62 Exhaust Manifold Valve Negative Pressure Control Solenoid
61 Air Suction Control Solenoid Valve
56 EGR System
55 EGR Valve Lift Sensor
54 Air Intake System
51 Neutral Position Switch
49 CO Resistor
48 Lean Burn System
53 Anti-Quick Operation Mode
66 Twin Turbocharger System(T)
66 Twin Turbocharger System(S)
66 Twin Turbocharger System(H)
66 Two Stage Twin Turbocharger System
65 Differential Pressure Sensor
64 Relief Valve Control Solenoid Valve 1
64 Relief Valve Control Solenoid Valve 2
53 IMM Control Module EEPROM
53 EGI Control Module EEPROM
53 Use of Unregistered Key
53 Key Communication Failure
53 Communication Error (Time Over)
53 IMM Circuit Failure (Except Antenna Circuit)
53 Reference Code Incompatibility
53 Antenna
89 VVT Systems (R)
88 Fuel Pump Circuit Malfunction
87 Variable Induction Solenoid Valve Circuit Malfunction
86 CAN (Communication System)
85 Charger System Circuit Malfunction
81 Torque Up Control Valve
68 Turbocharging Pressure Control Output Signal #2
67 Exhaust Manifold Valve Positive Pressure Control Solenoid
89 VVT Systems (L)
24 ISC Valve (Stick)
24 Open/Short in ISC Valve Circuit
32 A/F Sensor #2 System
32 A/F Sensor #1 System
92 Electrical Generation Control Signal Circuit Malfunction
91 TCS Relief Valve
71 Shift Solenoid Valve
72 Shift Solenoid #2 Circuit
73 Low Clutch Timing Solenoid Circuit
74 Brake Clutch Timing Solenoid Circuit Malfunction
77 Lock-Up Duty Solenoid Circuit
75 Line Pressure Duty Solenoid Circuit
76 Brake Clutch Pressure Duty Solenoid Circuit Malfunction
79 Transfer Clutch Duty Solenoid Circuit
93 Vehicle Speed Sensor #1 Circuit
27 ATF Temperature Sensor Circuit
94 Lateral G Sensor Signal Circuit Malfunction
11 Engine Speed Signal Circuit
38 Torque Control Signal System
36 Turbine Speed Signal
78 Tiptronic Solenoid System

cogin

Thats what i thought, bugger!!

Got the std b/box on, just waiting now for the ecu to forget the error codes, i'm hoping that the air flow through the MAF with the Magnex box was too much for it and it MIGHT be ok on the std one , every things crossed. I will let you know after 9.

turboDean

iTrader: (4)

Can't see a B/B effecting the MAF reading at all , even a full straight through exhaust with no cats shouldn't have any effect on the MAF. It's generally induction kits that kill MAF sensors.

But Good Luck

DAZZY J

If it's a Version V then quite likely to be MAF sensor.
I would get it sorted straight away.
Speaking from experience as I'm still in the middle of a rebuild costing over 4K on parts alone at the moment. You will do some serious damage if your MAF sensor is playing up. I think they are about £70 + VAT at Roger CLarke Motorsport. They also recommend changing the oxygen sensor at same time.
Good Luck.

pippyrips

i would leave the b/b on - it won't be causing the cel light

cogin

all ready changed back to the std box, can't be arsed to change it again!!

Got it running with the MAF disconected, it won't run more than 20 seconds with it pluged in!!

But with it pluged in theres no fault codes, WTF.

turboDean

iTrader: (4)

Apparantly it is quite usual for the MAF to die and not cause any fault codes. Sounds like it F**k*D to me, noticed on your "view my scooby" it's a 93 WRX, think the MAFs for early cars are quite expensive (£200+) from the dealer. So your best bet would probably be someone like Grade A:

Welcome Page

cogin

API didn't have one

Import car parts do £230
Just spoken to grade A they have one and are sending it out , fingers crossed that it gets here tomorow, i need the car to drive to the airport on Sunday, if i can get it fixed i might be allowed out of the dog house

Thanks for all the help hope to see you at one of the meets soon.

cogin

Good news

The MAF turned up at 7:25 and was duly fitted, car now running better that i every rember, the old MAF must have been on its way out for a while now, the idle is so much smother thather than all over the shop like before.

Thanks all for helping narow down the fault, and a big thanks to Grade A for getting me the parts nice and quick, saved my bacon

turboDean

iTrader: (4)

No problem, Glad to help

DannyBoy007

iTrader: (7)

Good news colin, now enjoy your holiday.

And when you get home, stick the back box back on and release the burble