Nissan : Datsun ZCar forum :Nissan Z Forum: 240Z to 370Z - View Single Post - 1983 280ZX NA - No power and then sudden burst
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post #2 of (permalink) Old 09-13-2019, 02:26 PM
chaseincats
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Quote:
Originally Posted by Jeff Collinsworth View Post
All,


I'm having a tough time with my 83 280zx NA. Ive rebuilt from the ground up. (Cylinder Head RnR, New Gaskets all Around, New Hoses All Around, new electrical plugs, tested and cleaned fuel injectors, etc)


Symptoms:
At about 2k RPM the revs drop down about 200 RPM and then bounce between 2k and 1800. Something is compensating for something causing this but i dont know what.


Also, when you hit the gas, there is almost 0 power and then a few seconds in revs match torque and car has power for days.


My fuel pressure is awesome, all injectors squirting, spark on all 6. No vacuum leaks that I can find. Not sure where else to go. Any help would be appreciated.
I'd check the throttle position sensor. It's that little black matchbox lookin thing on the side of the throttle-body - it is adjustable by slightly twisting it left and right.

1978 280z - stock L28 engine - Dallas, TX
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