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Today i got something very special, which i found in the USA: A box with "Maintenance of the Datsun 240Z Sports" Service slide films. Let me explain: The Box contains 7 small, numbered plastic cans. Each can has a dia film of colour photos (aka "Slides"). The booklet was Printed in November 1969. So it is from the very beginning of the 240Z. Additionally, there is a booklet which is called "Slide narration" the booklet contains the text to each slide. My understanding is that this was used to train workshop employees. Whoever trained them got a bunch of coloured slides which show how to maintain the 240Z in a workshop, and a book which shows what to mention for each slide. The purpose of the whole kit is also mentioned in the foreword on the first page of the booklet: I have never seen such a box before and think it's quite cool. It's basically a Service manual in colour photos. Some photos appear to be actually the same as in the black-and-white printed Factory Service manual. There are some awesome photos of Nissan works employees working on the cars. I still have to read it all and look through the photos. There are also many graphics and drawings shown, which I have never seen before, and most probably were made specifically for training purposes. I'm already looking for a dia scanner to digitalize them all and if I find time, I will share some of them with you. More updates in the coming days. I have planned some work and there is a sea-freight crate from Japan waiting for me to be picked up.

Then, in this pic... You see the little screw? That's an adjustment screw for the gauge. Make the contacts tighter, it should read higher. Make the contacts looser, it should read lower:

That's a great idea since that is currently my exact setup. I'll give that a try this weekend - thanks for that

This is easy to do if you already have a gauge spliced in. I put about 4ft of 5/16 hose between the fitting and the gauge. Unscrewed the gauge from the fitting, put the hose on the fitting with a good clamp, shoved the gauge into the other end of the hose and put on another EFI clamp. Zip tied it to driver's wiper arm and drove around for a day or two. Put the PSI numbers on here.

It's not the same. It takes a lot less fuel sitting still at 3K sitting than driving around. The load is so much lower. Try this... Sit in the driver's seat and with the engine running, push the gas pedal down until the engine is spinning at 3K. Note how little pedal it takes to do that. Way less pedal to do that than do drive around under load. Hope you can make some headway with this issue. I'm sure you're tired of dealing with it.