4758nigel Posted May 11, 2015 Share Posted May 11, 2015 hi all further to my previous post i have run the manual code reading and it threw up 22,23 &24 now the problem i am having is lumpy idle which occasionally results in the engine completely cutting out i have replaced the MAF sensor and that did nothing i was told by a mechanic mate of my who is really into subaru's that he doubt's it's the knock sensor as in all the years he has owned subaru's he has never had to replace one not even on customers cars i've reset the code's in the hopes that maybe the problem was that the "stored" codes were causing the issue but it's not made a single bit of difference so i thought i'd check for codes again in case it gave me more of an incite into what the problem was but it's not throwing up ANY codes anymore so have no idea what the hell the problem could be any suggestions would be greatly appreciated thanks in advance for any help/advice you can offer Quote Link to comment Share on other sites More sharing options...
Gambit Posted May 11, 2015 Share Posted May 11, 2015 I'd have a guess that it's the IAC code 24 that's making it stall. might just need cleaning mate :) 1 Engine Speed Signal Circuit 11 Crankshaft Position Sensor 12 Starter Signal 13 Camshaft Position Sensor 14 Fuel Injector No. 1 (Legacy, Impreza, Justy, SVX) 15 Fuel Injector No. 2 (Legacy, Impreza, Justy, SVX) 16 Fuel Injector No. 3 (Legacy, Impreza, Justy, SVX) 17 Fuel Injector No. 4 (Legacy, Impreza, SVX) 18 Fuel Injector No. 5 (SVX) 19 Fuel Injector No. 6 (SVX) 21 Engine Coolant Temperature Sensor 22 Knock Sensor 23 Mass Air Flow Sensor Circuit 24 Idle Control System Malfunction 24 ISC Valve (Stick) 24 Open/Short in ISC Valve Circuit 26 Intake Air Temperature Sensor 27 ATF Temperature Sensor Circuit 28 Knock Sensor #2 29 Crankshaft Position Sensor 2 31 Throttle Position Sensor Circuit 32 A/F Sensor #1 System 32 A/F Sensor #2 System 32 Oxygen Sensor 33 Vehicle Speed Sensor 35 CPC System 36 Turbine Speed Signal 37 Rear O2 Sensor Circuit / A/F Sensor Circuit Malfunction 38 Torque Control Signal #1 38 Torque Control Signal #2 38 Torque Control Signal System 38 Torque Permission Signal 39 Traction Control System 41 Air/Fuel Adaptive Control 42 Idle Switch 43 Accelerator Pedal Switch 44 Turbocharging Pressure Control Signal 45 Pressure Sensor 46 Neutral or Parking Switch or Circuit 47 Fuel Injector 48 Lean Burn System 49 CO Resistor 51 Neutral Position Switch 52 Parking Brake Switch (Exc. Justy) 53 Antenna 53 Anti-Quick Operation Mode 53 Communication Error (Time Over) 53 EGI Control Module EEPROM 53 IMM Circuit Failure (Except Antenna Circuit) 53 IMM Control Module EEPROM 53 Key Communication Failure 53 Reference Code Incompatibility 53 Use of Unregistered Key 54 Air Intake System 55 EGR Valve Lift Sensor 56 EGR System 57 Canister Control System 58 Air Control System 61 Air Suction Control Solenoid Valve 62 Exhaust Manifold Valve Negative Pressure Control Solenoid 64 Relief Valve Control Solenoid Valve 1 64 Relief Valve Control Solenoid Valve 2 65 Differential Pressure Sensor 66 Twin Turbocharger System(H) 66 Twin Turbocharger System(S) 66 Twin Turbocharger System(T) 66 Two Stage Twin Turbocharger System 67 Exhaust Manifold Valve Positive Pressure Control Solenoid 68 Turbocharging Pressure Control Output Signal #2 71 Shift Solenoid Valve 72 Shift Solenoid #2 Circuit 73 Low Clutch Timing Solenoid Circuit 74 Brake Clutch Timing Solenoid Circuit Malfunction 75 Line Pressure Duty Solenoid Circuit 76 Brake Clutch Pressure Duty Solenoid Circuit Malfunction 77 Lock-Up Duty Solenoid Circuit 78 Tiptronic Solenoid System 79 Transfer Clutch Duty Solenoid Circuit 81 Torque Up Control Valve 85 Charger System Circuit Malfunction 86 CAN (Communication System) 87 Variable Induction Solenoid Valve Circuit Malfunction 88 Fuel Pump Circuit Malfunction 89 VVT Systems (L) 89 VVT Systems ® 91 TCS Relief Valve 92 Electrical Generation Control Signal Circuit Malfunction 93 Vehicle Speed Sensor #1 Circuit 94 Lateral G Sensor Signal Circuit Malfunction Quote Link to comment Share on other sites More sharing options...
stants Posted May 11, 2015 Share Posted May 11, 2015 Have you checked for any fuel line issues or a weak fuel pump ? Quote Link to comment Share on other sites More sharing options...
Scooby Pete Posted May 11, 2015 Share Posted May 11, 2015 check coil packs my classic had a ICV code turned out to be a cracked coil pack. 1 Quote Link to comment Share on other sites More sharing options...
savage bulldogs Posted May 11, 2015 Share Posted May 11, 2015 Have you tried Unplugging and checking for corrosion on the big grey plugs at either end of the engine loom , same with the engine to inlet and bodywork earths . Do you not know anyone local with a compatible scoob that you can switch a few bits over to try and eliminate the issue . Not wanting to contradict your pal but I have known at least 3 knock sensor failures admittedly they've all been newage 1 Quote Link to comment Share on other sites More sharing options...
4758nigel Posted May 11, 2015 Author Share Posted May 11, 2015 He did suggest unplugging the loom plugs and checking for corrosion I'm gonna give that a go tomorrow after checking to see if it's thrown up anymore codes after clearing them my mate said if I need a knock sensor to try then he has loads spare. As for knowing anyone with another Scooby that's compatible unfortunately I don't as I've got the "crossover" model (from classic to new age) so most people I know either has the classic or new age not the crossover :( Thanks all for your help and advice I will check for codes vacuum leaks and the loom plugs and let you all know :) 1 Quote Link to comment Share on other sites More sharing options...
4758nigel Posted May 11, 2015 Author Share Posted May 11, 2015 I've visually inspected the coil pack as it still has the standard pack (on top of the inlet manifold) and can't see any damage and all seems to be sparking fine Quote Link to comment Share on other sites More sharing options...
4758nigel Posted May 13, 2015 Author Share Posted May 13, 2015 well it threw up the MAF circuit code again but at least it's only the one error code now which is helpful Quote Link to comment Share on other sites More sharing options...
4758nigel Posted May 13, 2015 Author Share Posted May 13, 2015 i will try looking at the grey loom plugs tomorrow when I've got the washer bottle out to try and clean up the spark plugs. I also wanted to ask what is the best way to test for vacuum leaks as i have no idea where to start as this is my first turbo (that's not either a shogun or Peugeot diesel) and don't really want to start pulling pipes off to check each one separately i have seen a few video's on YouTube of "smoke testing" and one for using soapy water as-well as a guy use carb cleaner but he said that it could result in an engine fire so don't really want to take my chances in all honesty so any advice and if possible pics/video would be great help as i'm a learner by watching and doing rather than reading due to having dyslexia Quote Link to comment Share on other sites More sharing options...
4758nigel Posted May 17, 2015 Author Share Posted May 17, 2015 thought i'd share this coz i've tried taking the vacuum hoses off and checking them for splits etc and have cleaned all 4 of my spark plug with electrical contact cleaner not yet check the loom plugs but wanted to share a video of the idle when i was changing over from the forge DV to the recirc i had the DV connected to the TMIC and the recirc connected to the smaller vacuum hose (still had the bigger hose capped and the car ran fine so not too sure if that points anyone else away from the MAF since i've replaced it already or wether it's still pointing towards an intake problem of some kind also as i change gear you can hear a pop which is also pointing me towards either vacuum leak or dodgy spark plugs (which none looked particularly bad) Quote Link to comment Share on other sites More sharing options...
Jay762 Posted May 18, 2015 Share Posted May 18, 2015 Still does sound like leak somewhere particularly as you have it running fine, soapy water way to go for leaks Quote Link to comment Share on other sites More sharing options...
savage bulldogs Posted May 18, 2015 Share Posted May 18, 2015 When trying to locate air leaks use soapy water after the turbo as the positive pressure will cause bubbles where it leaks . Before the turbo (air filter to turbo) you can try spraying a bit of carb or brake cleaner if it's sucking in air through a leak the idle will rise when you spray in that area due to it sucking in the cleaner . Don't go crazy with the carb or brake cleaner as its flamable (hence the idle change if its leaking) especially near the turbo outlet or "hotside " It does seem like its a issue with the dv have you tried to refit the recirc and remove the dv all together ? 1 Quote Link to comment Share on other sites More sharing options...
4758nigel Posted May 20, 2015 Author Share Posted May 20, 2015 i don't have a recirc for my engine only got one like this... http://www.ebay.co.uk/itm/Subaru-Impreza-Recirc-Valve-Genuine-Factory-Newage-01-07-/331559639507?pt=LH_DefaultDomain_3&hash=item4d327e99d3 so i've had to take the big pipe off it to be able to fit it to my TMIC Quote Link to comment Share on other sites More sharing options...
savage bulldogs Posted May 21, 2015 Share Posted May 21, 2015 As long as the recirc fits the tmic and seals up ok maybe try using it as a vta by leaving the bung in the oe recirc to inlet pipe (so the recirc then vta instead of dumping the air into the intake pipe) and connecting the vac line . If it runs /drives ok that would indicate that the aftermarket vta dumpvalve isn't sealing and letting in extra unmeatered air causing the idle issues . Quote Link to comment Share on other sites More sharing options...
4758nigel Posted May 22, 2015 Author Share Posted May 22, 2015 I'm currently still using the recirc valve with the bung still in the "bigger" pipe as I put it on and was still the same so figured I'd just leave it on and try and eliminate the problem in case the DV was an adding factor to the problem I am however starting to think that I'm gonna need new spark plugs ASAP as my idle (with maf connected) is at around 100rpm (no not a typo Quote Link to comment Share on other sites More sharing options...
savage bulldogs Posted May 22, 2015 Share Posted May 22, 2015 have got the smaller dia vacuum pipe connected to the recirc ? Quote Link to comment Share on other sites More sharing options...
4758nigel Posted May 24, 2015 Author Share Posted May 24, 2015 Yes I have got the smaller vac hose connected to the recirc valve Quote Link to comment Share on other sites More sharing options...
savage bulldogs Posted May 24, 2015 Share Posted May 24, 2015 That idle is throwing me cos it surely shouldn't be able to tick over at 100rpm . Does it drive ok or is it just idle issues? Quote Link to comment Share on other sites More sharing options...
4758nigel Posted May 24, 2015 Author Share Posted May 24, 2015 it's kind of "judders" when i'm accelerating almost like it's hesitating to allow boost or something then all of a sudden it just hits boost full pelt and throws you back in the seat but only when the MAF sensor is plugged in otherwise there is no boost allowed at all hardly due to limp mode/fuel cut also it's burning ALOT more fuel now too (min £10 per day with not many miles for it) Quote Link to comment Share on other sites More sharing options...
stants Posted May 24, 2015 Share Posted May 24, 2015 I reckon lambda sensor is next to check Quote Link to comment Share on other sites More sharing options...
savage bulldogs Posted May 24, 2015 Share Posted May 24, 2015 Shame you're not closer as I've got a few spares kicking around and we could have tried to eliminate it (plugs , leads , coil pack ,maff , lambda ect ) Try unplugging 1 spark plug lead from the coil pack end then starting it up to see if it's better or worse if worse turn off and plug it back in. Repeat this with each cylinder turning it off before each unplug (unless you want a hi amp shock) to see if it's misfiring on a individual cylinder 1 Quote Link to comment Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.