1984 Nissan 300zx

never ever let any NISSAN engine CAM belt fail
or bend the valves over in the heads, or worse.
gee the engine is listed and maker as the only cars made that all their engines are INTERFERENCE engines.
5 engines used that year world wide, here they all are.

2.0 L VG20ET V6 Turbo (200Z, 200ZG, 200ZS)
2.0 L RB20DET I6 Turbo (200ZR)
3.0 L VG30E V6 (300ZX)
3.0 L VG30ET V6 Turbo (300ZX Turbo)<<<< bingo i guess.
3.0 L VG30DE V6 (300ZR)

this is normal. for high performance engines
to run 2 cams and huge valves and super high CR compression ratio's and lost of extra power (say from old push rod engines)
the Pistons, chase the exh valves closed super close.
this gains huge power, this act. (cam timing did)
so are interference.
but no engine told or country, told.
so no exact answers are possible. lacking that, or USA VIN if is USA>
in some countries they de-tune and engine for marketing reasons.
or what ever. IDK.

what a shop does is not crank it more and bend it more.
we do a BY HAND cylinder leak down test. or just inspect the cam timing using just EYEBALLS.
the manual for the car SM says do not move crank with cams not timed. clear as day. ever read a SM service manual?
page 1 , on timing belt page states this../

All 1984-88 Nissan Z and ZX engines are equipped with timing belts. Since these engines are of an "interference type'' design, if the timing belt breaks, the valves may contact the piston heads and cause extensive engine damage. Therefore, regular timing belt inspection and replacement is very important.!!!! oops <ignored this?
60k to 100k miles they fail, use Gates belts to run 100k.
MILES. if not in USA covert that to KMeters>
better engines are chain drive cams and not mix/belt/chain.
some cams need cam locks to do it.

cam wheels are at 11am left and 1pm right
and crank is very odd this. engine



belt tension is 22lbs (top center) RTM read the manual carefully

How many miles are on it? Could be timing chain wear.

Fix your car right away by clicking the link I attached
1995 Nissan 300zx

Hello! If the timing belt broke while the engine was running coupled with the fact that #1 cylinder has no compression; Yes, there is damage...Guru...Saailer

I’m happy to help further over the phone at https://www.6ya.com/expert/david_6df67de3b14de867

CHECK THE ECU FOR CODES, ALSO HOOK UP FUEL PRESSURE GAUGE WHILE DRIVING TO SEE WHAT IT IS READING WHEN IT CUTS OUT

Yes it does have a timing belt but should be checked for fuel pressure and spark. How many miles are on this engine?

The mass air flow sensor is real sensitive to chemicals,this may be the problem,it will not start if the mass air flow is not working.

the timing can be adjusted via the crank angle sensor... under the hood on the upper right side of the engine there is a metal piece with a mitsubishi symbol on it. it has 3 screws visible and a plug. undo the screws and depending on where it is now twist it so that it is slightly to the left of center about 1.5millimeters off center. the crank angle sensor is not a way to majorly adjust the timing just minor adjustments. i assume the car is running now so its probably severely advanced you can concievably fiddle with it to get the smoothest idle out of the car. between 650 and 800 is good

Check your mass airflow meter. If it's bad, at least on my 1990 300ZX, the car won't rev over 2400RPM (it's a safeguard built into the ECU of the car). Grab one from a scrapyard and swap it in and see if that fixes the issue.