Question about 1993 Nissan 300ZX

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Won't start car will turn over, but does not start, I have good fuel pressure, spark. when problem started last week, it sometimes started, and sounded like it was starving for gas, as i opened throttle a little,and pumped gas a little it went to normal high idle. I have good pulse on injectors , and also switched out mass air, but it didn't make andy difference----it would just turn over, thanks lenny

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  • Anonymous Mar 23, 2014

    motor starts, but when given gas it dies. There's a hissing noise coming out the tail pipe. And it sounds like it's starving for fuel.



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Also if your friend wants his sensor back i have a spare engine and sensor... ill give it to you if you need it. on the cas make sure that it isnt just turned all the way to the right or left. it should be adjusted so that the 3 holdiong screws are in the middle and slightly to the left.. good luck it would help if you had a timing light.

Posted on Jan 09, 2009

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If there is someone near you with a Z, see if you can swap your cam angle sensor with theirs as a troubleshoot. The CAS is the round metal sensor on the front of the engine, driver's side, coming through the timing belt cover. It has one electrical connector coming into it. It is possible that the CAS is going bad, and if so it could cause the problem.

Also, the one recall for the 90-96 300ZX was the PTU, power transistor unit. It's the small black box on the passenger side timing cover, with a 6-7 wire harness coming in one side, and out the other. The early ones were known to overheat and fail, and the car would start intermittently or not at all. Your car likely has the updated version of it, but it can still fail. It would be worth trying to swap that as well, to see if that fixes the issue. If either of them do, you can buy that part from either new or used, and install it.

A note with the CAS - it's keyed to go on in one position only, but since the cams rotate at half the frequency of the crank, if you install it and the car starts, then peters out and dies, then you have it 360 degrees out of phase. Remove it, spin the shaft one full revolution, and reinstall it, and it should run.

Posted on Jul 22, 2008


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