I had Landspeed Auto in Chicago look at my 1993 3000gt sl that had it's engine swapped with a 1992 jdm engine.
They told me that the mechanic that installed the 1992 jdm engine (Action Auto Services in Palatine, IL)
didn't swap over the Japanese sensors which are not compatible with US ECU.
Action Auto Services spliced the wires so that my 1993 3000gt will work for the 1992 Japanese sensors.
Landspeed said I need to swap cam & crank position sensor part #md153464,
which is located on top engine close to throttle body
ignition sensors (ignition control modeule) part # md15888, & crankshaft position sensor which he said is located on bottom of engine.
Landspeed didn't have part# because their computer system just said to 'call dealer' so
he gave me 1993 part # css504 to cross reference to figure out the 1992 part number.
From my research talking to Mitsubishi dealers & searching the web I think Landspeed might have given me wrong info
First off it's confusing why is it that when I search the other part #md153464 what Landspeed called cam & crank sensor on google that
some people call this the camshaft sensor & other call it the crankshaft sensor??
It appears more people call this the crankshaft sensor so that appears to be right.
However others including Landspeed originally said this is cam position sensor.
He said cam sensor is on top of the engine & the crank sensor is underneath.
Later he changed what he said the name of this part & said this was cam & crank position sensor. I already ordered this part #md153464 which
I will now refer to as 92 crankshaft position sensor
Now for other part in question the dealer said part #css504 is not their part number, however I found on Advanced Auto the css504 is their 3000gt 1993 crankshaft sensor.
which matches with Mistubishi #md187066
the closest thing that I could find that matches on a 1992 is Advanced auto part #CSS605 which
which they call camshaft/crankshaft position sensor.
which seems to match with Mitsubishi part # md187067
which all the other parts stores I saw call camshaft position sensor so I will now refer to this part as 92 camshaft sensor.
I believe this is the part I need even though Landspeed said it was a crankshaft sensor...
because the crankshaft sensor is the other part #md153464 92 cranksahft position sensor that Landspeed said was called the cam & crank sensor.
Does anyone know if I'm right?
Another confusing thing is the some parts stores list md187067 camshaft position sensor as compatable 1991-1999
others list it as compatable 1993-1999
If this is the part I need then I should have this part still on my old 1993 engine so my question is can I just use this to swap over to the 1992 jdm?
I read there's latency issue with using 1992 ecu using 1993 sensor but does that issue only pertain to
sensor part md153464 92 crankshaft position sensor or does it also effect part md187067 92camshaft position sensor?
here's info on the latency issue I read:
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There is one aspect of using 1991-1992 sensors with a 1993+ engine control unit (ECU), or 1993+ sensors with a 1991-1992 ECU that must be considered. Brian Geddes and Matt Jannusch (on the Team3S email list) pointed out that the two different types of sensor have different latency. Latency is the amount of time it takes the sensor to respond to the optical disk or vane and send a voltage change to the ECU. The ECU is programmed to accomodate the sensor latency. As determined from the AEM standalone engine management calibrations, the latency for the 1991-1992 sensors is 50 microseconds (us), or 0.050 millisecond (ms). The 1993 sensors have a 130 us latency (0.130 ms). What this means is that if you install the 1991-1992 optical pickup sensor and use a 1993+ ECU there will be more ignition timing advance than the ECU wants. If using 1993+ Hall effect sensors with a 1991-1992 ECU, there will less timing advance than what the ECU has determined is correct for the engine operating conditions. The AEM software allows a user to adjust the latency for the different types of sensor to assure the actual timing advance matches programmed advance. This latency difference in sensor types causes a few degrees difference in timing at high rpm. For example, at 7000 rpm, a single degree of crank rotation takes place in 0.0238 ms (23.8 us); 7000 rpm = ~116.667 rps ==> ~8.57 ms/rev = 0.0238 ms/degree. There is a difference of 80 us between the two types of sensor, leading to a 3 to 4 degree difference in timing.
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