thanks mate. Thats what I thought. And im thinking....maybe it's learnt something wrong. Room 101 for some ECU re-education me thinks
Looking forward to seeing if this service has fixed it for you, because my Z has just started doing this same thing. Hopefully its just the O2's :biggrin:
I will let you know. She's in today... haha its not even 10am and im itching to ring to see how things are going HAHA Patience :zlove:
update for everyone: just put in my new fuel dampner and fuel pressure regulator yesterday (some of those little hoses are real ***** to get off lol). Took it for the first run today. So far i don't 'seem' to have hesitation like before. But as i said it was always intermittent and i may not have warmed her up enough. By any means there were no negative effects to changing those parts. And some of the little bits of fuel hose needed replacing anyway. On a side note, Coz has surprised me again with amazingly fast shipping. My parts were dispatched last wednesday. And they arrived monday morning good stuff i may put my o2 sensors in later this arvo also
Yes, I believe Caz has posted previously that her fuel damper was leaking fuel down the vac line into the balance pipe and causing her problems.
yeah. I'll give it another run later and we'll see how it's going. I just really really don't wanna come to the realisation that it's the manufacturing defect that some of the earlier model z32's had in one of the heads, instead of something simple and cheapish to fix.
yes in the early model z32's there was a very slight defect in one of the heads that wears out the CAS i believe and causes problems with the timing. Some of the american guys have been in the exact same situation as me til they learnt of this problem. true story.
Well on the engine defect theory... my engine was swapped by last owner for one with 90,000ish on the clock so im taking it that wouldn't be an "earlier model" but could be wrong. now... im afraid I wont be telling you if the O2 sensors have fixed my issue today. Before I go on, let me say that I HIGHLY recommend Tenarga motorsport of cars they like to work on. Silvia's, Rotorys, Supra's, Evo's, WRX's etcv etc. They truley look after both car and customer and I really can praise them enough for work they did on my 180sx. However....... They are also honest enough to say "no sorry mate, I dont want to do that" And that is what they have said re installing the O2's. FOr them it's "too hard" even though I have explained my understanding of the simplicity of the procedure. On a zed, sadly, it is not something they want to touch. They have done the service and throttlebody clean so I'll give feed back on that when i get the car back tonight, so see if that's improved things..... But its back to Tom for O2's im afraid. (Well not afraid... but I know he's busy etc etc) He's going to "try" and see if he can fit me in before Chrimble. Good on ya Tom :zlove: Shame about Tenarga coz I really like using them, but its a bad case of "its a zed.... too hard" which is sooo wrong on such a simple job that people are doing in thier back yards EDIT: To expand on thier reasons for not doing o2's 1) They need a tool they dont have so i explained that you can just snap off the end and use a deep socket etc etc 2) If we snapn off the end and the sensor is stuck, then your car is undrivable fair enough... explained about the soaking over night but i could tell it was already "too hardd" and in my mind i had already to just try and ring tom as soon as i got off the phone"
Have got car home after service. No diferent. What has been done: 1) Fluid change 2) Oil Filter 3) New K&N POD filter 4) Check for boost leaks and intake leaks (i dont know how much effort they acctually put into this but anyway, I dont think its a boost leak as boost comes on fine) 5) Upper Engine Clean (they did this the Suberu way, flushing some checmical through the system and watching heaps of black carbon come out) They said the system was very clogged up and heaps came out. NOTE: THEY DID NOT FIT THE O2's (see post above) but as said, no diference. So.... Im going to reset the ECU first. See if i get any diference. Then, on the directions of Tom/PZP, Im going to disconnect the O2's and see if I get any diference. Now.... diconnecting O2's..... I know it will run rich (it is anyway) but what other effects? Like... would I be silly to run a whole cruise with O2's disconnected? I'll be on the cruise on Sat and see how it goes. Reasoning is, the symptoms actually do seem to "clear" after about...20 mins of driving. Not totally but they get better. So im thinking, nothing "mechanical" is getting worse or killing itself. As it only takes me 15mins to get to work, I didn't realise that it does kind of clear so...... yeah im up for a cruise, even if i go home after 2 meet points.
so basically if i was to just unplug the O2 sensors take it for a spin and if the problem has stopped then its probably the O2's? or is there something I'm missing?
thats the ticket. Tom was saying (and i think ive got this right) that with the O2's unplugged, the ECU will simply run a default map for A/F mixture rather than reading the sensors to work out what it should be running. Not sure if this would also make you run safety boost though???? (anyone???) But for a diagnostic... it sounds like a good move.
Alright, sounds good. Well i know the boost is fine (I'm assuming because it makes full boost) so thats not a worry even if it does go into safety boost. I'll give it a go tomorrow and I'll see how it goes
There was an issue with mis aligned heads on some early engine numbers. Unless you know the fully history of your car it may have alreayd been fixed. I read about it in one of the faqs on twinturbo.net
