Bnr34 Vpec 2 Bonnet
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Ok interesting i guess ill wait till using a manual gauge before making assumptions. -
Not in any way a logical conclusion. Also, looking at those logs, I struggle to see how that much oil pressure can go away that fast unless you are sucking air into the pickup. Meanwhile the ECU voltage is chucking a huge wobbly which seems to be tied to the throttle position. 100% throttle results in decreasing voltage. It's a mess. -
So didn't get around to installing a manual oil pressure gauge and then decided to take the car for a cruisey drive to a cars and coffee and brought the laptop along with to get another log using more gears to see if its an oil pressure issue under acceleration or after. this log has 3 gears of WOT where as previous had 2 and the oil pressure dropped once on the brakes, and the same again happens here which is interesting as it shows it can hold oil pressure while under acceleration but once slowing or just the lower RPM after a pull pressure drops. I will be chucking a manual oil pressure gauge on to confirm but so far this makes me feel it is not an electrical issue. Something else i realised is the pressure sensor also is giving temperature information and the temp stays steady the whole time which makes me feel like the sensor itself is showing a true pressure reading.
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For sure the later RB26 variants had a different setup (6 cam voltage sender?), but the RB25DE/DET share the same ECU pinout/PCB footprint, and at the ECU plug it ends up being 'throttle sensor in' & 'throttle sensor out' (to A/T TCU) ...you stick a multimeter on these pins and you'll find them directly connected (0 ohms) ; I had an pair of Nissan ECUs on the bench long ago, and I noticed this throttle sensor in/out link, actually linked to an op-amp ...which was unpopulated on the NA board, but present on the T board and I went 'ah-ha!' in some moment of clarity... ...it wouldn't surprise me if they changed strategy here though (in the software and actual monitoring of this signal), because they did with other stuff (A/T signals).. and 0.45v as a trigger point makes sense, as that's what the external TCU units expect at idle ; kudos, thanks for that insight...I suppose it boils down to whether or not Consult can display real time data of that signal's voltage... ...in any event, it presents the same target...ie; rotate TPS unit to achieve 0.45v to suit both ECU&TCU, and where do you goto from there? Just disconnect TPSwitch connector and/or that plus TPSensor connector....or do you go for the throat and disconnect IACV solenoid and see if it still stalls? (probably throws a recoverable fault code and goes for default idle strategy?)...
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