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Right, that's a CIS M104, only had them for a few years, kind of an oddball now.
If you really don't know the state of tune then it might be time to at least look at the plugs, cap and rotor. I am not saying to start replacing parts, but start with the basics. Again if you don't know about the air filter, fuel filter and like that, again you need to maintain these cars. See if it has the proper plugs.
I was not getting at "low octane" when I asked that. What I remember from these days was there were some engines that would start and run better on MID grade rather than HIGH grade, seems wrong I know but I know we fixed a few hard-starting cars by having them try the midgrade fuel, something you could try.
Cam position sensor, now you have me thinking: In more recent times the cam position sensor is used by the fuel injection system. Crank sensor is for ignition timing. Being a CIS car, there should be no cam position sensor (not a sequential injection engine). You have a SOLENOID connection I believe as it does have variable cam timing (on/off, not really "variable", just 2 positions, not advanced ((off)) or advanced ((On))). That connector is on the side of the upper timing chain cover, drivers side. I may be all wrong, but I think the CIS cars did have this, I know the SFI cars did.
Now I suppose it could be that the advance could be getting stuck mechanically (lack of maintenance ie oil changes making it gummy?) into the advanced setting and might cause a starting problem if it did.
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