TwinTurbo.NET: Nissan 300ZX forum - Rpms are jumping around
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Subject Rpms are jumping around
     
Posted by 93 Blue Z32(NC) on March 06, 2013 at 7:03 PM
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Message during cold start, z starts and idile fine (1000rps)
As it warms up, Z drops to (700 650rpm)

Thats a Normal Warm up

Then after warmed up z jumps idle 2000 to 500 or stalls
and will stop jumping idle and everthing is back to normal.

Wied

Now whats been done is new injectors have been installed (740cc)
Nistune is installed and tuning had to stop because I thought i had a injector mix match (qty 3 370cc with 3 555cc) so i went with 740 and have not retuned z yet.

Also for reason is motor is only putting out 380Hp at 18psi and air fuel ratio was wacky and timing was maxed out (tuner told me he had no more timing to give)

Somebody had worked on z so i stop the z dyno time to investigate

I found that ther where 4 small air leaks fuel pressure reg. vac line leaked.
Detonation SenSor was unpluged.

I changed the air regulator valve last year and order a new set of plugs but to only put them in when back at dyno bc my driveway has big black spots from just idiling for 10 mins to investigate problems

Thanks for any help is the tune causing wierd idle

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