bambam Posted January 7, 2015 Share Posted January 7, 2015 hi all, bought my first impreza about a month ago and has been a massive headache ever since, its a 95 uk turbo 2000 it has a td05 turbo, manual aftermarket boost controller and was told it is running 1.1 bar of boost, however not long after i got it i lost boost and have not yet located a leak, i found that the factory boost controller had bean bypassed and not knowing much about subarus and modding them i plumbed it back in how it was ment to be, i took it out and 3,500 revs come with a massive backfire and i nearly went through the windscreen, i put the aftermarket unit back on as was when i first got it but the car still has the problem now i all gears jerks and backfires, does anyone have any idea what could have been damaged to cause this??? and possibe ways to fix it cheers :) Quote Link to comment Share on other sites More sharing options...
savage bulldogs Posted January 7, 2015 Share Posted January 7, 2015 Unfortunately it Sound's like the previous owner just bolted on a bigger tdo5 and turned the boost up with the manual controller (uk turbo's should have a tdo4) without mapping it . If that is the case the oe map fuelling would be set up for the smaller turbo and is probably retarding the timing and using the fuel cut to try to stop any damage . Have you done a self code check ? Do you know what ecu is in it and if it's been mapped ? Quote Link to comment Share on other sites More sharing options...
Gambit Posted January 7, 2015 Share Posted January 7, 2015 Hi mate welcome to S.O.C Also sorry to hear about your experience not completely uncommon with these types of cars to have an amauter with no experiance mess about with them and course problems. I have a manuela boost controler I had it in the car 2 weeks never used it and disconnected it after reading horror stories about the damage they do if you don't know what you're doing. Savage is !Removed! good with the knowledge on classics like your's and agree with him :) Quote Link to comment Share on other sites More sharing options...
bambam Posted January 8, 2015 Author Share Posted January 8, 2015 Cheers :) ill start with saying it boosted and went like the clappers when i first got it, me and a mate both have obd2 and about 4 diffrent programs and none of wich could read the ecu, im unsure what ecu is in it and the preveous owner told me it has been remapped but there agean he told me it was a nice car :-/ the car overheated didnt drop all its water or out like that but got hot thsts when im sure i lost me boost. And also it ran a little jurkey one day after i atempted to clean the maf sensor (instruction from another forum) Quote Link to comment Share on other sites More sharing options...
savage bulldogs Posted January 8, 2015 Share Posted January 8, 2015 Classics have a self code read function (much like the gm paperclip test ) connect some plugs together under the dash there's a how to on here somewhere The ecu is Under Passenger side front carpet behind a kick pannel what's the number code sticker on the ecu ? If it is a subaru ecu (not aftermarket) it would need to have a esl daughter board fitted in order to be remapped , the only way to find out is to unplug the ecu , take the cover off and look for a circuit board with esl 93/96 printed on it Does it even backfire when off boost and you gradually build the Rev's up or is it just on full throttle ? 1 Quote Link to comment Share on other sites More sharing options...
stants Posted January 8, 2015 Share Posted January 8, 2015 Beat me to it mate http://uk.subaruownersclub.com/forums/topic/2366-manually-reading-ecu-codes/ taken me that long to find it some reason I can't get to it using tapatalk [emoji35] Quote Link to comment Share on other sites More sharing options...
quit Posted January 8, 2015 Share Posted January 8, 2015 manual boost controllers are the devil ! Quote Link to comment Share on other sites More sharing options...
bambam Posted January 8, 2015 Author Share Posted January 8, 2015 Cheers everyone :) im at work at the minite so ill crack on tonight n see wot i can figure out and keep yas posted Quote Link to comment Share on other sites More sharing options...
bambam Posted January 8, 2015 Author Share Posted January 8, 2015 And the anser to your question savage is keep it under 3.500 revs and its fine as soon as it goes over that no matter what throttle it splutters coffs and backfires Quote Link to comment Share on other sites More sharing options...
quit Posted January 8, 2015 Share Posted January 8, 2015 yeah the car is confused i bet, the ecu is telling the turbo one thing but its isnt gettin the right fuel/air mixture If its not got a daughter board on 1. Remove Td05 and stick TD04 on (can be had cheaply) 2. Remove boost controller 3. Install a boost gauge check your hitting 0.8-0.9 bar of boost OR Remove boost control valve Get a daughter board fitted get a remap 2 Quote Link to comment Share on other sites More sharing options...
savage bulldogs Posted January 8, 2015 Share Posted January 8, 2015 Hopefully a code check, the ecu number and ecu reset will give us some answers . 1 Quote Link to comment Share on other sites More sharing options...
bambam Posted January 8, 2015 Author Share Posted January 8, 2015 Hi all me agean :) i did a fault code test and sat idle there was nothin however when i took it for a drive to try reset the ecu it brought up code 43 accel pedal switch.... then on the same run i made it jerk and whatnot and the code then changed to number 12 starter signal???? :-S i have not had time yet to look at the ecu itself hopefully ill get chance tomorrow Quote Link to comment Share on other sites More sharing options...
bambam Posted January 8, 2015 Author Share Posted January 8, 2015 Quote Link to comment Share on other sites More sharing options...
savage bulldogs Posted January 9, 2015 Share Posted January 9, 2015 I think 7d is the standard ecu for your age uk turbo you but it still could be mapped if it has a esl or alcertek ecu board in it . Although I do doubt that it has been mapped due to it having a manual boost controller . The standard injectors should be grey 380's for that year and ecu . electrics aren't my forte unfortunately but maybe check all earths /plugs are clean under the bonnet . Also check there's no break in the insulation on the wiring especially near the starter motor and throttle position sensor (black sensor on the throttle body) .As this tells the ecu the position of the throttle and adjusts the fuelling to suit throttle position . Here's a pic of a early esl'd ecu so you can check if it's been mapped or can be remapped Quote Link to comment Share on other sites More sharing options...
Steveuk260.Esq Posted January 9, 2015 Share Posted January 9, 2015 I thought to clarify. Early ipmrezas pre 2000 do not use obd, obd2 or eobd protocols. They may have obd plug but it uses SSM - Subaru Select Monitor Protocol. This has different pinout to obd standards. 1 Quote Link to comment Share on other sites More sharing options...
bambam Posted January 9, 2015 Author Share Posted January 9, 2015 So is there anything special i have to do before pulling out the ecu like removing the Battery etc Quote Link to comment Share on other sites More sharing options...
bambam Posted January 9, 2015 Author Share Posted January 9, 2015 there ya go Quote Link to comment Share on other sites More sharing options...
savage bulldogs Posted January 9, 2015 Share Posted January 9, 2015 Thats a Standard ecu innerds so not mappable I'm afraid bud . Quote Link to comment Share on other sites More sharing options...
quit Posted January 9, 2015 Share Posted January 9, 2015 yeah! best bet in my opinion is go Apexi set up Quote Link to comment Share on other sites More sharing options...
bambam Posted January 9, 2015 Author Share Posted January 9, 2015 So they are made factory with the esl or alcertek board? Its not an add on to make them mappable Quote Link to comment Share on other sites More sharing options...
quit Posted January 9, 2015 Share Posted January 9, 2015 No it's a add on mate Or you pull that lot out to go stand alone like apexi Quote Link to comment Share on other sites More sharing options...
bambam Posted January 9, 2015 Author Share Posted January 9, 2015 Oh so i could get that one remapped just need the add on? Wich one would be more cost affective Quote Link to comment Share on other sites More sharing options...
savage bulldogs Posted January 9, 2015 Share Posted January 9, 2015 Not much in it cost wise tbh Second hand Apexi ecu and controller £350 ,fit and map £250(ish) Esl'd daughter board supplied, fitted and mapped £600 . There's a few pros n cons with both types I was quite happy with my old esl'd v3 ,I'm now currently running a apexi set up on my v1sti which I can't fault either . Quote Link to comment Share on other sites More sharing options...
quit Posted January 9, 2015 Share Posted January 9, 2015 Yeah depends where your based too as some mappers don't travel Quote Link to comment Share on other sites More sharing options...
bambam Posted January 9, 2015 Author Share Posted January 9, 2015 Well after unpluggin my ecu i took my car out and thort id try my luck and see if it was still backfiring and instead of doin that it actually boosted at about 4grand!! After doin it a couple of times im sure i felt it trying so splutter agean :( but i supose its a good thing it boosted, my mechanic thinks my headgasket may have gone :( booo Quote Link to comment Share on other sites More sharing options...
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