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alright quick rundown of whats going on here on my 260RS stagea

1- as i pull up and my RPM drops it will dip to 600- 700 rpm for just a fraction of a second, as it does that the oil pressure gauge will shoot straight to zero for a few seconds then slowly rise back up

2- it will only do this on a hot engine, doesnt happen at all untill the car is up to temp

3- oil pressure light on dash also lights up (is there a separate sensor for the light and gauge?)

4- oil level is fine and ive checked for leaks, none

5- pressure will also drop if engine is warm and im sitting on the spot, rev it up to say 4000+ rpm and again on that drop to 600-700 rpm the oil pressure gauge will intantly drop to zero then slowly rise back up

any ideas guys??
cheers =]

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The factory gauges are notoriously bad.

The fact your light come son in concerning as it's separate to the the gauge.

What grade oil are you running?

I would get something thicker in there asap and start planning pulling the engine out.

Ohhh right so they actually are off the same sender?...well in a way that's good news

Hopefully that's all the issue is.... ill pop into nissan and grab a sender tomorrow

probably worth fitting an aftermarket gauge to keep an eye on things for future too if they're really that bad

http://www.kudosmotorsports.com/catalog/genuine-nissan-oil-pressure-senser-genuine-nissan-nissan-300zx-z32-skyline-r31-jdm-r32-all-r33-all-r34-all-p-1220.html

This ^ is a very good price. I bought one recently which resolved a similar issue on a 32 4 door.

Normally $200+. God knows what Nissan will charge, so please post back their price too.

Alright quick update

Thanks for the link sinista32

You're right on with the price $250 from nissan for that sender

But before forking out the cash for either I decided to pull my pressure gauge off the other car and see what's actually going on

The pressure definitely is dropping but not to zero like the factory gauge is saying

Its dropping to around 1kg/cm

Which at normal idle will sit at 2 kg/cm

And under acceleration raise to 6kg/cm

Anyone know if these figures seem normal? ??

Cheers

Ohhh awesome looks the pressure figures are sitting well within reason

Suppose I should just get a new sender anyways but at least ive rolled out having to pull the motor out now :)

Thanks for the assist guys

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