jackkelly Posted March 4, 2014 Posted March 4, 2014 (edited) My set up is.Speedvision Hybrid CT9WEPR tubular manifoldZ-Sports 38mm external wastegateTial .8 bar springWEPR downpipe2.5" stainless pro racer catbackJAM ECU1.4mm steel headgasketApexi AVC-R @1 bar boostARC topmount intercoolerCusco bigbore hotpipeNGK Heat range 7 plugsMagnecore 8.8mm leadsOEM king leadMy issue is when I'm on boost, take for exapmle in 4th gear at 4,500 rpm on full throttle the car boosts perfect (holds 1 bar steady) and the revs climb evenly but the car feels like it has no torque (felt more powerful last week at .6 bar)If I leave off the throttle the car gives a chug as if it want's to speed up when on 10% throttle.Same in all gears but most noticeable in 5th.I had a problem last week and she threw on code 52 (knock sensor).. I changed that today and the car drove fine but noticed it hesitating again in high revs tonight, not half as bad but still noticable.I'm thinking because the JAM ecu's main way to fuel the car via the Lambda it could be fucked, throwing too much fuel in and bogging it down?I'm also thinking the ARC top mount could be getting too much heat soak and bogging down the car aswell?I was also thinking it could be a weak fuel pump?Plugs weren't done in over 6 months so could it be them too?Any opinions welcome lads, thanks. Edited March 4, 2014 by jackkelly Quote
GP82 Posted March 4, 2014 Posted March 4, 2014 Seem's like your ignition is locked at 10 degrees, this is like a safe mode so you don't fry your motor, but it can also be bad in regards to heat buildup if the car stays in this state for too long as the ignition timing is retarded. This has a tendency to make high egt's as the spark lead is sent late on the exhaust side. As you are getting the knock sensor code from diagnostics, i would check continuity of the knock sensor wiring from ecu to sensor. Quote
jackkelly Posted March 4, 2014 Author Posted March 4, 2014 Yeah it seams as if she's hitting DET.. Just doesn't feel 100% right, could I adjust my distributor?I changed it and sorted out all the knock sensor problem. Quote
scottieboi94 Posted March 4, 2014 Posted March 4, 2014 I have the same problem with the holding back but unsure of why it happens :L i know my cars overfueling but apart from that i haven't noticed any other issues, the holding back started to happen when i plugged in the JAM ecu Quote
scottieboi94 Posted March 4, 2014 Posted March 4, 2014 I did notice if you hit near a bar of boost (0.97+) it holds back, this might be to do with having a 1bar map sensor? When boost is lowered to around 0.92 it doesn't seem to hold back as much Quote
jackkelly Posted March 4, 2014 Author Posted March 4, 2014 Mine's the exact same!! if she's around .95 she'll pull hard all day long, it hasn't held back, well I haven't noticed it. Quote
scottieboi94 Posted March 4, 2014 Posted March 4, 2014 Could be to do with having a 1bar map sensor, but fueling may need to be looked at ive been meaning to get mien looked at but been too busy haha or maybe a new fuel pump? Quote
scottieboi94 Posted March 4, 2014 Posted March 4, 2014 I run the same ecu and turbo and would recommend running about 0.92, if you run it at a bar i think your pushing the turbo a bit too much imo, it's fine to run but to reduce the holding back and to make your turbo last longer i would run it at 0.92 as i don't see much difference between 0.92 and a bar anyway tbh Quote
jackkelly Posted March 4, 2014 Author Posted March 4, 2014 Was hoping to run 1.2 bar to be honest haha. Quote
jackkelly Posted March 4, 2014 Author Posted March 4, 2014 Done 1.3 bar before on a ct9... This hybrid with a steel head gasket should hold 1.1 bar at least. ;) Quote
scottieboi94 Posted March 4, 2014 Posted March 4, 2014 I wouldn't but it's up to you lol and ye you have a steel headgasket so will be different for you Quote
corofin12345 Posted March 6, 2014 Posted March 6, 2014 jack, if you can get your hands on a 1bar w/g spring.. stick it in and see if your still having issues.. disconnect the EBC.. ull know then if its the EBC or something else... we got the timing sorted.. id say the EBC is at fault or just needs to be set up right Quote
scottieboi94 Posted March 7, 2014 Posted March 7, 2014 I'm running a gizzmo ebc, if i disconnect it will it run at the boost level set on the actuator? Quote
glanza89 Posted March 7, 2014 Posted March 7, 2014 I has this issue was knock sensor iirc , replaced it , the code still came up but car runs fine and no issues on rolling road ect Quote
scottieboi94 Posted March 10, 2014 Posted March 10, 2014 Why does the knock sensor cause the car to hold back though :L Quote
GP82 Posted March 11, 2014 Posted March 11, 2014 It is because the ecu need's to register activity from the knock sensor in order to safely advance the ignition timing. Without the feedback from the knock sensor, the programming within the ecu will lock the timing at 10 degrees, it is a failsafe so you don't fry your motor from detonation as a result of too much spark lead. If the ecu does not recieve this signal, how can it know how to safely advance the ignition... You will have a slow car with bunsen burner flames. Quote
scottieboi94 Posted March 11, 2014 Posted March 11, 2014 Oh ok, so i may replace that then and see how it goes Quote
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