redz11 Posted May 14, 2014 Share Posted May 14, 2014 (edited) Hi guys, Just after a little help, I put my JAM ECU back onto my GT, so I see the engine light appear, (it came on previously and was showing code 52, No Knock Sensor signal) I have had the knock sensor replaced and correctly fitted, its not loose, nor is the cable, nothing appears to be damaged/out of the ordinary. Also I am getting code 14 (No IGF signal to ECU) the engine starts and runs fine but idle is very random from time to time. Now the weird part, I put my standard ECU back on, I don't get any engine lights atall, the check engine light doesn't even come up on turning the ignition.. also no error codes show on the standard ECU. Ive tried my JAM ecu in my friends GT, ran it as normal allowed it to idle etc, his GT threw up no error codes, so am I right in thinking that there is an underlaying problem somewhere with my GT? Not sure where to start, for code 14, is it best to possibly look at changing dizzy, ignitor, HT leads? any help would be awesome! bearing in mind this is my daily so I want to keep anything bad happening to a minimum... EDIT: I also noticed once my blitz dumpvalve had dumped it is leaking its tits off, I have blocked this off for now and running chatter.. I don't think this could be the sole cause as the codes still appear on the JAM ecu.. also my fuel pressure is set at 3bar. Edited May 14, 2014 by redz11 Quote Link to post Share on other sites
akyakapotter Posted May 14, 2014 Share Posted May 14, 2014 (edited) Dosent the jam ecu not use stock fuel pressure? Edited May 14, 2014 by akyakapotter Quote Link to post Share on other sites
karl. Posted May 14, 2014 Share Posted May 14, 2014 Is there not slight differences in the looms of the ep82s that one or two wires are in a different place? Check the codes on your standard ecu and your mates and that should tell you if they are different. Quote Link to post Share on other sites
1990timeismoney Posted May 14, 2014 Share Posted May 14, 2014 Check the codes on ecu if it's pre 1992 and put in a later model the wires need to be swapped others will be able to confirm Quote Link to post Share on other sites
redz11 Posted May 14, 2014 Author Share Posted May 14, 2014 Dosent the jam ecu not use stock fuel pressure?Dosent the jam ecu not use stock fuel pressure? Ive always had an RRFPR, we set it to 3bar as it appeared to fuel nicely on this, never had any issues in the past. Is there not slight differences in the looms of the ep82s that one or two wires are in a different place? Check the codes on your standard ecu and your mates and that should tell you if they are different. My friends GT is a K reg (93) but its a mk2 like mine so the loom should be the same. Check the codes on ecu if it's pre 1992 and put in a later model the wires need to be swapped others will be able to confirm my GT is 94, you mean the codes on the actual ECU itself? I do have another standard ECU spare but need to check it. Quote Link to post Share on other sites
1990timeismoney Posted May 14, 2014 Share Posted May 14, 2014 (edited) The earlier ecu I think is with a green label.The black label or code with 10100 is manual and think is straight plug into 1992 onwards and 10040 is pre 91 and will need two wires swapped to work in a later model Edited May 14, 2014 by 1990timeismoney Quote Link to post Share on other sites
redz11 Posted May 14, 2014 Author Share Posted May 14, 2014 (edited) ah, my JAM ECU has the black label and my standard has the green, but with the JAM ECU before I have NEVER had any engine codes pop up... which is the odd thing... EDIT: my jam ECU has the green sticker; Edited May 14, 2014 by redz11 Quote Link to post Share on other sites
1990timeismoney Posted May 14, 2014 Share Posted May 14, 2014 Was it a green label on your previous ecu you will need to use the ecu pin out diagram and swap the wires I had the same problem Quote Link to post Share on other sites
1990timeismoney Posted May 14, 2014 Share Posted May 14, 2014 http://www.toyotagtturbo.com/forums/showthread.php?20491-EP82-EP91-ECU-Pinout-Diagram Quote Link to post Share on other sites
redz11 Posted May 14, 2014 Author Share Posted May 14, 2014 (edited) ah they're both the green label bud, stuck at a cross roads, this is the first time its happened since ive owned the JAM ecu, unless this second knock sensor I bought is fubar'd which I doubt is the case, or something else is wrong with my car.. edit: thanks for the help so far guys Edited May 14, 2014 by redz11 Quote Link to post Share on other sites
1990timeismoney Posted May 14, 2014 Share Posted May 14, 2014 Ah i see same ecu i didn't read it properly im not sure then what's the code on your standard ecu Quote Link to post Share on other sites
redz11 Posted May 14, 2014 Author Share Posted May 14, 2014 thats the weird thing, there are no codes showing when the standard one is on, even tried running it for 10 minutes to see if something would pop up, but nothing did.. :s Quote Link to post Share on other sites
1990timeismoney Posted May 14, 2014 Share Posted May 14, 2014 That's a pre 1991 ecu by what I remember and won't work in the MK2 others will be able to confirm Quote Link to post Share on other sites
1990timeismoney Posted May 14, 2014 Share Posted May 14, 2014 MK2 and mk3 ecu pinout is the same and code is 10100.The mk1 1991 is 10040 and will need two wires swapped to run in a MK2 or mk3 Quote Link to post Share on other sites
redz11 Posted May 14, 2014 Author Share Posted May 14, 2014 Ah I see, so the Jam ECU is a 1991 ecu, oh wow, how the hell has it ran fine for all this time? Quote Link to post Share on other sites
1990timeismoney Posted May 14, 2014 Share Posted May 14, 2014 I'm not sure if it ran fine it must be something else have you ran it in the car your putting it in before Quote Link to post Share on other sites
5e colin Posted May 14, 2014 Share Posted May 14, 2014 redz swap a few pins around buddy she be a gooden then :) Quote Link to post Share on other sites
redz11 Posted May 17, 2014 Author Share Posted May 17, 2014 I am now much more confused... I went to take out my standard ECU in the GT, the sticker is conviently half torn, but you can make out that it is the 10040 ver, I haven't swapped any wires as of yet as I dont think i would need to? Quote Link to post Share on other sites
1990timeismoney Posted May 17, 2014 Share Posted May 17, 2014 Should be fine by the looks of the code.What do the error codes you get stand for Quote Link to post Share on other sites
redz11 Posted May 17, 2014 Author Share Posted May 17, 2014 code 52 (No Knock Sensor signal) code 14 (No IGF signal to ECU) the idle is very bouncy too while on the JAM ECU :/ Quote Link to post Share on other sites
1990timeismoney Posted May 17, 2014 Share Posted May 17, 2014 code 52 (No Knock Sensor signal)code 14 (No IGF signal to ECU)the idle is very bouncy too while on the JAM ECU :/I had a code 52 before and was the wire connection had you put a meter on it to check current or is it continuity Quote Link to post Share on other sites
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