August 21, 201510 yr Hi I have a 1998 Impreza terzo and have an issue with it juddering and cutting out I had two exhaust leaks which I thought was causing the problem but they have been fixed and it did not cure the cutting out. Car runs fine and dose not have that issue if I take the lamda sensor out. I've had my garage put it on the computer but they can't get a reading as there's don't work on Subaru also phoned a couple of remap places and they don't get involved with subau. any ideas what could be causing this (coil pack/spark plugs/boost solenoid??? Don't wanna keep chucking parts at it so before I do thought I'd ask on here 1st.
August 21, 201510 yr If your check engine light is on you can perform a self code check. There is a thread here detailing how.
August 21, 201510 yr Author No engine light on it has come on once and gone I thought it had to be because of the exhaust leaks one in the centre after the down pipe and one befor the turbo in the up pipe would this have messed with the ecu should I reset ecu to get rid of any codes
August 21, 201510 yr I did word that a bit silly. You can still do the self code check and see what codes the ecu has recorded. Do a code check before resetting it and after the reset monitor it and if it logs a code again check that before it can log too many.
August 21, 201510 yr If it's gone out again i'd say either lambda or less likely maf. If you find a local independent subaru place they will have the ssm1 kit to check properly, if you really want to have a basic look you can get a cable & software from www.evoscan.com
August 21, 201510 yr Author Ok will try do checks over weekend. Pretty sure it's not the maf as the garage tested that. Lambda sensor is about 4 years old and my spark plugs were done about 3/4 years ago so maybe they should be changed. It's a bit strange I get two exhaust leaks and the day after finding them the car started to cut out when coming to a stop then juddering and cutting out at around 4000rpm if the ecu has not been reset after haveing the exhaust fixed would it still have the code stored even tho it's been fixed. Can't see it being lambda even tho the car dosnt have the issue without it I thought the ecu kind of ignores the lambda after 3500rpm hope u can sort of understand what I'm saying as I'm not so good at wording things
August 21, 201510 yr The ecu will save every code from when it was last reset. You may be in for a surprise. When you say cuts out at 4k rpm, you mean the engine basically stalls? Whats the mileage on the plugs? I'd go for a change anyway at that age.
August 21, 201510 yr Author prob about 40 thousand miles car will be booked in to have coil pack and plugs done in 2 weeks.
August 23, 201510 yr Author Possibly but the car cuts out at full throttle 4000rmp and I thought the lambda sensor was ignored by the ecu at that stage
August 23, 201510 yr Ah OK. I didn't see that symptom earlier in the thread. Strange. Is it a sudden cut out or cough and splutter first? How long do you have to leave it before it will start again? Sent from my HTC Desire 510 using Tapatalk
August 23, 201510 yr Author Judders then stalls. Starts straight away and if I drive it normal it's fine soon as I boot it that's when it cuts out I've had new fuel pump/fuel filter/air filter/crank sensor next is coil pack and spark plugs. Haven't had time over the weekend to do an ecu reset hopefully that will cure it
August 23, 201510 yr Blimey. Good luck. I did have a very similar problem with a Vauxhall Zafira once. No code logged but was the coil pack. Sent from my HTC Desire 510 using Tapatalk
August 23, 201510 yr Author Yeah my garage couldn't get a code but there computer don't work well on Subaru apperantly no European computer works well with them so a lot of mapping company's don't touch them
August 23, 201510 yr Most code readers won't work on classic scoobs but you can check the codes yourself [emoji6] http://uk.subaruownersclub.com/forums/topic/2366-manually-reading-ecu-codes/page-1 Have you changed the spark plugs recently? Is there any breathing mods fitted (cone ,decat ect ) If you've got a boost gauge what does it peak at?
August 23, 201510 yr Author I've had the decat for 5 years no cone just standard Plugs are being done as have not been charged for 3/4 years and I do have a defi boost gauge but sadly it's blown
August 24, 201510 yr Author Just done ecu reset car was fine for 10mins and I was driving the hell out of it with no problems till I nearly got home and it started with the same issue
August 24, 201510 yr Have you done a ecu code check to see if it's now got any fault codes stored now the symptoms are back ?
August 24, 201510 yr Author I done one before I reset it and there must of been quite a few as it was flashing for a while in diff patterns. Didn't have time to do another check as it got dark. When I drove the car to reset ecu the check engine light was flashing the the whole time till I turned car off is that right
August 24, 201510 yr Tbh I've never had to do a self code check in my 3yrs of scooby ownership and only ever had the eml come on after a iffy remap
August 25, 201510 yr Author I've just checked my fault code and it flashes the same code over and over again think it's number 23 it's to long flashes and 3 quick flashes then a pause then dose the same again. Am I doing it right connect the two black wires and then turn ignition on and to reset ecu it's the two green ones.
August 25, 201510 yr Yep sounds right, off rhe top of my head it's a lambda sensor issue, will double check now though
August 25, 201510 yr Yeah just checked lol I knew 2 and 3 related to some 02 issues just the other way around 32 is O2. Have you tried doing the stall test on the maf even if the garage had tested it and it's showing a value still may not be operating correctly
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