[vacuum boost at idle?]

I had this problem. There was water in my gauge. I just blew it out and was fine.

 

Yea not having that issue sadly it's actually a boost leak that we can't find/figure out. We bled that clutch dampener also that helped so much with the pedal. Now only issue is this damn boost leak 

[200zr wiring diagram for dashboard]

Yikes....that IS a nasty mess!

 

Don't know if this will help or not, but XENON carries free FSM downloads for most model Z's. Here's a link to their Z31 page:

 

http://www.xenonz31.com/reference.html

 

Good luck with it.

Yea I know this is a late response but that did actually help and we got everything working with new autometer ultra lite 2 gauges except the tach.

[vacuum boost at idle?]

Also after looking at it closer I'm guessing that thing I thought was another cylinder is just the clutch dampener?

[vacuum boost at idle?]

Now we checked all the lines for holes/tears or kinks everything was fine in that regard. This time though when driving in 3rd and 4th it will climb boost and without even letting off it just drops down and then will quickly flash to possible said boost. I have noticed a loss of power also now. Were going to run full boost leak tests either tonight or tomorrow. Only other thing I can think of is since my clutch was starting to act up  rbrm jpihj its pretty new it needed to be bled and it was slipping now we bled the one slave cylinder valve but there is another one on top or whatever we didn't bleed that one though cause wasn't sure if we should. I got part of my clutch pedal back but it still has a bit too much play and isn't as firm as it was a couple days ago. It's also being somewhat noisy while going into gear. I've heard that the clutch can affect the boost while the engine is under load so maybe and hopefully it's something as simple as just bleeding the other cylinder. Not sure what else to do at this point other then that. It's at least underboost and not over boosting. I am not hitting near as much boost as I was and the gauge is acting funky the way it's reading.

[vacuum boost at idle?]

Ok i'll check again nah I'm running autometer ultralite 2 mechanical for all my guages

[vacuum boost at idle?]

So not sure what happened, but if I'm not mistaken my car was idling around -15 to -20 in hg and now it's just sitting at 0. When you get on it half to full throttle it still hits boost fine and reads accurately but the actual vacuum seems off. We checked all the lines seems to be fine and not a leak not really sure what else to do at this point. Is this ok to drive until I sort it out though?

[200zr wiring diagram for dashboard]

[200zr wiring diagram for dashboard]

Found out the issue, didn't even need the diagram. After taking out dash interior everything saw the harness is just hacked up shits cut things aren't connected I'll upload some pics it's just a mess.

[200zr wiring diagram for dashboard]

Hi I'm new to the forums I have a 1987 200zr with an rb25det, right hand drive had an rb20det in took that out did an rb25det swap. It has custom front mount intercooler, radiator, and motor mounts from Mckinney Motorsports. HKS intake which is tucked underneath only place to fit it without **** rubbing but still does it's job. Greddy blow off valve. Plan on doing custom suspension but right now just riding on some eibach spring kit in the meantime. I am trying to find a wiring diagram so I can get the dash working again. 

 

I had an rb20det and the speedo never worked before but after putting in the rb25det the dash hasn't worked at all the wiring diagram would be insanely helpful.