So I keep killing PTU's. On Tuesday I burned through my 3rd PTU in as many months (and probably under 300km). I've checked all my shitty wiring as per the FSM, and it checks out OK. My only conclusion is that the S2PTU is shit. I need your condolences and perhaps some technical knowledge along the way. Discuss.
Can't help with Tech Knowledge in respect to PTU's 1 or 2(but I can say that I have been running a S2 PTU for 12 years, without a hitch). You have my condolences as always Mitch(but then, you know that already, Dear Boy).:rofl::br:
Now I'm happy for you Josh, and I'ma let you finish, but this is my shitty S2 PTU thread. The shittiest of all-time. I herd you can use igniters off other models- someone used an Holden ecotec V6 module didn't they? Might have been Tas?
You're probably right. I've been buggering around with this car for long enough that I'm the only common problem. Everything else has been replaced/ swapped out / pissed off / or modified. While I can't see any shorts in the wiring (and I understand the earth lead is the primary culprit for PTU failure), there might be something going on with it being an intermittant fault.
Where's that zxdorifto fella when you need him? Since he's an electronical injun (or whatever they call themselves these days), maybe I could get some advice on how copper wiring reacts to hot environments over time. Is it possible that the wiring had become impregnated with shit over time, so much so that it is no longer conducting the right signal, or losing its conductance over time. If I remember right with my year 12 physics, there was this french (or german) Doctor called Lavator? Von Shitzle who hypothesized that the current through a conductor (ie the wiring of a 300zx) between two points (ECU and PTU) is directly proportional to the potential difference across the two points (ie the propensity of shittyness of one's wiring). what's the latest hottness with RHD wiring looms? Last I head was the supply was drying up (like a nun's proverbal). Are the LHD units easy enough to install?
it could be. harnesses can go to shit from the heat, crack, short out etc plenty of shit can go wrong
****, that's not what I wanted to hear. I would have thought that a 20-year-old grey import was going to be reliable! "As they say, 60% of the time, they work every time"
Last I heard, that wiring specialties company in the states was making aftermarket rhd and lhd harnesses with a few modifications (like separate injector sub harnesses) or some shit like that.
problem is, each time you test it could cost you a ptu.... thats a pretty shitty game to play... expensive losses
So once I get my wiring sorted out (and cut my losses through the generosity of other forum members (thanks for the bids guys, much appreciated), here's the plan: I'm going to mount the PTU under the nose panel, alongside the chassis rail. The mount will incorporate one of these: ...So it will keep cool and maintain optimum transistor temps (they operate less efficiently at higher temps, apparently). Phase2 is different coils, perhaps OEM off something more modern, or aftermarket options (splitfire etc). As for ignition timing, the CAS has a decent resolution for the crank angle, is there anyone out there that uses something else? I know the holden V8's use a hall effect sensor or something run off the crank harmonic balancer. I seem to remember UAS was doing something similar?
Be afraid. Be VERY afraid. Cars I touch have a tendency to spontaneously combust. You have been warned.
