What is your time base ?
Can you post a capture (psdata file)?
Cranking can lead to wildly different speeds of rotation verse hot idle which can be quite consistent if all is well ...
Sorry but when you say in cylinder is that pressure?
If your are overlaying 4 separate captures, then I'm speaking hypothetically as not tried this, but I'd set the time base to cover from slow to fast rpm, say 120 to 480, 120 being 2 compressions per second, so 2 seconds to cover all 4, and allowing for cam phase offset and where you place the trigger, call it 5 seconds to cover trigger and 2 cycles, so 500ms per div.
If cranking bear in mind that you might need to try a few captures per cylinder tested to avoid bad starter offset (IE early inertial issues). And may be if you have 4channels add an amp clamp 600/2000amps...
Ok, could have misunderstood completely, but if you want to overlay 4 crank pre start captures, you need to ditch some as cam will trigger will lead to some slower or faster inertia rates or set time base longer, say 1s per div. trigger as single, and review each.
Might be persistent trigger would help, but with cranking, it might not, never tried this, sorry!
Please explain more and post what you've got ... Probably misunderstood your needs, let me know