Please help. wrx 93 import model

[bigcena]

please help, i have recently bought an impreza wrx 93 import model. it was running fine other than intermittant tick over fault. now cel is illuminated and it will not rev past 4,500 rpm. any suggestions, greatly received. thank you. ps. it was parked for 3 wks over xmas while i was abroad [i dissconected battery for 1 hour and it was running great for a couple of miles and then fault returned.

[uk dave]

Probably as ecu reset itself ran ok then picked fault up again im guessing maf as that makes for a crap idle and occasional cutting out(not saying it is for definate though)

Dunno if ya can read the fault codes the same on a classic wrx or not however

Manually Reading ECU Codes (Classic Impreza’s only)

On Classic shape Impreza’s only (not Newage) faults can be displayed as pulses of the Check Engine Light. If the Check Engine Light goes out there is no fault.
In order to perform diagnostic (and ECU resets) you will need to connect some wires together under your steering column. Note, the following procedure only works for Classic shape Impreza’s, not for Newage.

• Make sure your ignition is OFF
• Connect the Black ‘Read Memory’ connectors together as illustrated below.

Figure 1 - Black and Green Connectors on Classic Impreza

When the above are connected you are in diagnostics mode. Turn your ignition ON and ‘read’ the ECU code(s) being reported according to the following instructions. Note, you may here relays clicking and your fan starting and stopping - this is normal when in diagnostics mode.
In Diagnostic Mode – No Fault is indicated by the Check Engine Light continuously & evenly flashing on/off (this is also used to indicate the successful completion of an ECU Reset).

Figure 2 - Check Engine Light Pulse Width

The long pulses (1.3 Seconds) indicate Tens and the short pulses (0.2 Seconds) indicate ones. Pulses are separated by Short Pauses (0.2 Seconds), multiple codes are separated by a Long Pause (1.8 Seconds).
The simplest way for an inexperienced mechanic to retrieve codes is to write the codes down in a sort of Morse Code (dots and dashes), and start a new line when you get a 1.8 Second pause (for NEW code), and then add the actual numbers up after code retrieval is completed.
(See Example Below)
--- CODE EXAMPLE, SINGLE CODE ---
1.3 second pulse (10)
0.2 second pause
1.3 second pulse (10….for a total of 20)
0.2 second pause
0.2 second pulse (1…..for a total of 21)
0.2 second pause
0.2 second pulse (1…..for a total of 22)
0.2 second pause
0.2 second pulse (1…..for a total of 23)
(Code 23 — MAF Sensor)
--- CODE EXAMPLE, MULTIPLE CODE ---
1.3 second pulse (10)
0.2 second pause
1.3 second pulse (10….for a total of 20)
0.2 second pause
0.2 second pulse (1…..for a total of 21)
0.2 second pause
0.2 second pulse (1…..for a total of 22)
0.2 second pause
0.2 second pulse (1…..for a total of 23)
1.8 second pause (this means NEW code)
1.3 second pulse (10)
0.2 second pause
0.2 second pulse (1…..for a total of 11)
0.2 second pause
.2 second pulse (1…..for a total of 12)
(Codes 23 and 12, MAF Sensor and Starter Circuit)


fault code explanations http://www.scoobypedia.co.uk/index.p...odeDefinitions

[p mallows]

Hi Dave have problems starting from hot, followed your advise on manual readings and found i need two sensors, great ,yet to aquire but no problem found out by using the two black connections but no way can i find any green connections, Thought you may be able to help on that one, sensors needed are engine coolant and camshaft sensor. Thanks. Email is psmallows@yahoo.co.uk, if you get time.

[holyfield]

no green on import mate

[stockcar]

they'll be taped into the loom if never used before...............
on every classic i have looked at!!

[stockcar]

just a though but does your speedo work??