Question about 1993 Nissan 300ZX

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My 1993 nissan 300zx will not go past 2500 rpms and it bucks

Brand new engine harness.brand new timing belt.the car wont go past 60miles an hour and it wont go past 2500rpms when driving,and it bucks when i try to go past the 2500rpms

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Check timing and valvs

Posted on Mar 01, 2009

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300zx won't start, no spark


I had 1 about 2 years ago that did the same thing, it turned out to be the timing belt , pull the small cover off the timing gear and see if it's turning the cam

Jan 04, 2014 | Nissan 300ZX Cars & Trucks

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1990 nissan 300z 2 2. After it runs for awhile, the rpms wants to go up about 800 to 1000 when I stop. I can push the gas pedal down and rev the engine and most times it will return to normal rpm. I...


Take to a nissan tech this sounds like a bad tps sensor throttle position sensor or a cruise control issue . Your problem is likely to serious to deal without a code reader an having the vehicle in front me. Think of safety first here or a accident.

Oct 08, 2010 | 1990 Nissan 300ZX

2 Answers

1993 Nissan 300ZX idles high 1800rpm cold or hot.


yes, thats the typical symptom of a IAC valve giving you trouble, try cleaning it up but ull probabbly will have to replace it
have fun
hope this helps

Nov 11, 2009 | 1993 Nissan 300ZX

1 Answer

I have 1990 TT, new injectors, new air filter, Idles at 2000 rmps, hesitates when I depress the gas pedel,but will spin up 2500 rpms then cuts out, any ideas?


disconnect the ecu for about an hour to reset these to the makers default setting, also sounds like the maff sensor has broken down, i.e computer tries to put to much fuel in and not enough air! have you also replace the fuel filter?

Nov 01, 2009 | 1990 Nissan 300ZX

2 Answers

I am thinking of weighing the option of keeping it or selling it


if you like the car, and the rest of its in excellent condition, then fix it.it its rusted under neath, paint bad, interior bad, then NO. try to find a low mileage newer engine. I dont know Nissan that well, but didnt the MAXIMA use thes same engine. if so, there a lot to choose from. a salvage yard should be able to tell you what engines will fit. I would get one from a MAXIMA if at all possible. older mature drivers, ect.

Oct 01, 2009 | 1985 Nissan 300ZX

1 Answer

When i got back in the car it turns over but wont fire!!!


check spark plugs and see if they are firing, if good then check the condition of the crank and cam sensors

Sep 14, 2009 | 1993 Nissan 300ZX

1 Answer

1985 nissan 300ZX wont start!!!


check the timing belt see if it jumped time or broke you can also tell but pulling distributor cap and see if rotor turns when engine cranks!!!

Sep 07, 2009 | 1985 Nissan 300ZX

1 Answer

300zx erratic idle 1993 n/a


Your Idle Air Control Valve is at fault. These never set a code when they fail and they always fail.

Check this item out on eBay.

http://cgi.ebay.com/ebaymotors/nissan-300zx-OEM-idle-air-control-valve-IACV_W0QQcmdZViewItemQQ_trksidZp3286Q2em20Q2el1116QQhashZitem5189d6b9f7QQitemZ350204901879QQptZMotorsQ5fCarQ5fTruckQ5fPartsQ5fAccessories

They aren't usually this expensive so search the net and you should find a much better deal.

You shouldn't need to worry about the gasket when replacing this. They usually don't tear and stick to the manifold. If it does tear though you should replace it

Aug 27, 2008 | 1993 Nissan 300ZX

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