Hi,

 

I have two problems if any one could give me some advice would be brill.

 

First one, is the oil pressure gauge has been working fine, but now is slow and on idle only goes up to about 40psi will go up when revved but only half way up, dont want to **** the engine by driving it:-( engine sounds fine and no noise when revved ect any way of checking the gauge might have give up but Iam quite new to zeds lol.

 

Second one, is some times the revs will go up to just under 2k and when this happens you get a little white smoke out the back not loads, the revs will come back down its like something is sticking open.

 

any help would be great.

 

cheers mark

1) oil pressure sender fault, easy to change but expensive from Nissan

 

2) sticking auxillary air valve, bad connection or bad setting on tps not returning to hard idle.

 

Jeff TT

Cheers is the oil gauage a common fault, is the car ok to drive Jeff? if the oil pressure was low is there any way to tell apart from gauge?

 

where is the auxillary air valve located please, can you adust the tps?

 

god I must be numb lol, done abit of engine work but not on the 300zx lol.

 

cheers mark

just checked engine oil level and its spot on.

 

as for the revs some times it can be stud at idle and then rise by its self.

 

cheers mark

ok let the oil cool down for a few hours, started it and the oil gauge went up to normal reading around half on idle, so hope it is a faulty oil sendor jeff, must of been because oil was warm for some reason.

 

cheers mark

ok let the oil cool down for a few hours, started it and the oil gauge went up to normal reading around half on idle, so hope it is a faulty oil sendor jeff, must of been because oil was warm for some reason.

 

cheers mark

 

Its a common issue, the oil presure sender wears out inside on the resister track where it sits the majority of the time, this causes a high resistance connection and hence the gauge drops.

 

Jeff TT

cheers Jeff just didnt want to drive it and cause engine damage, will have to get one.

 

heers Mark

Hello can some body tell me were the auxillary air valve and tps sensor is located please.

 

cheers mark

This was site was found by another member should be of help to you

 

http://www.z32photoguide.com/index.html

 

or this

 

http://300zx-twinturbo.com/cgi-bin/manual.cgi

Edited March 5, 201114 yr by zedwizz

will have alook cheers bud