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Car died at track day - shitty wiring or bad sensor?
Hey all. Just asking for a quick sanity check here. My car died about 5 sessions into a track day a couple weeks back and I'm just now getting into fixing it. Composite logger is showing no crank trigger when it works (why does the composite logger not work like 70% of the time?), and the regular log is showing 0 RPM while cranking. I have 12V across the two outside pins on the crank position sensor connector, and I have continuity back to 2E on the ECU from the middle pin. Sure seems like the sensor bit the dust, but I did this VVT swap wiring like 7 years ago so it's also totally possible that one of my splices went bad.
I know the cam position sensors go bad with some regularity, but has anyone heard of the crank sensor going bad?
I don't remember if Delphi is OEM or not. I sourced several different sensors in ~2017 and did a bench characterization. The Mazda branded one is the way to go (at least for a 36-2).
Mitsubishi, but even the aftermarket units made by Mitsubishi are junk. I don’t understand why, just have had the same issue with new Mitsubishi units from Rockauto.
Well, I did what you said not to and ordered the Delphi unit for $45 instead of $170 for the oe from Jim. I will come back and eat crow if I come to regret this decision in a year.
(I’ve been running a car parts store CAS for years- hopefully my luck continues)
I killed a Beck Arnley crank sensor in my 01... I think it was acting up for at least one track day, if not 2.
Swapped to a real OEM sensor... Had to change my tune from falling edge to rising edge and then redo my timing offset... only thing tuner and I could think of is the sensor is in the housing backwards or the wires are wrong inside... somehow the knockoff didnt get it quite correct from an OEM sensor.
Update - I twisted the mounting bolt off, and then an extractor off in that. So the car has been sitting in my garage for the last 4 months untouched.
Time to start making some progress. Looks like the bolt is fucked in the oil pump, which is stock - not a bad time to upgrade to a boundary pump I suppose. Timing belt, water pump while I'm in there.
1. Should I stick with the stock trigger wheel? The only time I've ever had sync issues is on cold starts when cranking speed is kinda low. 36-2 is easy enough to add while I'm in there
2. Fluidampr also?
3. Where do people get their timing belt components these days? This used to be the ticket back in the day - is this still the case? FM is out of stock on VVT components
Update - I twisted the mounting bolt off, and then an extractor off in that. So the car has been sitting in my garage for the last 4 months untouched.
Time to start making some progress. Looks like the bolt is fucked in the oil pump, which is stock - not a bad time to upgrade to a boundary pump I suppose. Timing belt, water pump while I'm in there.
You're going to have to pull the motor to pull the oil pan to do the oil pump... Its not just a "pull the front of the timing **** off and change the oil pump" operation.
I would see if you cant drill out and re-tap even if its a slightly larger size, or throw a time-cert in it. Might have to pull the radiator and some other **** in order to get a drill squared up in there, but far easier than pulling the engine.
I've already accepted that I have to pull the engine to get this fixed. The oil pump housing looks like cast aluminum, and drilling it out was a possibility until I broke the bolt extractor off in it. Much more likely to **** up the housing than drill that out at this point. There's also not much meat to drill a larger hole into (see photo). The car has been running boosted for 7 years now - seems good a time as any to clean up some leaky seals and **** anyway.
12-28-2023, 12:22 PM
Car died at track day - shitty wiring or bad sensor?
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