Jump to content
SAU Community

Recommended Posts

Hey guys! Im not sure if im posting this to the right part. Im new to this. I had my cylinders pressure tested today on my RB 25det and cylinder 3 is 140 cylinder 4 is 130 and cylinder 6 is 100. What is going to be my best option with this? Would i be better off rebuilding it or look into just dropping another engine into it? Any information or help would be greatly appreciated 

Edited by Beaudr33
Link to comment
https://www.sau.com.au/forums/topic/480059-cylinder-pressure-test/
Share on other sites

First of all how does it drive? Are you planning to modify it? If not it could go for another year or more. If its your daily driver look out for another engine. If not pull the engine out and strip it to see what it needs before deciding to replace it.

1 minute ago, KiwiRS4T said:

First of all how does it drive? Are you planning to modify it? If not it could go for another year or more. If its your daily driver look out for another engine. If not pull the engine out and strip it to see what it needs before deciding to replace it.

Drives normal but every now and again it will run rough as all hell. It was my daily driver till about 6 odd weeks ago when i took it to my mechanic. Its been sitting ever since till yesterday and today when he started working on it. I do plan on doing some mods to it but now not till i work on this problem 

18 minutes ago, Beaudr33 said:

but every now and again it will run rough as all hell

Low compression won't make it run rough. That will be something else. Dirty injectors, faulty coils, AFM, CAS, IACV, etc etc. The usual suspects on 30 year old Skylines.

If you have the money, rebuild it. You'll need ~$5k just to get a rebuild that you won't be ashamed of done though. Nothing special, mind.

  • 2 months later...

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now


  • Similar Content

  • Latest Posts

    • A few small updates since the previous post and lessons. I decided to do a little interior light upgrade on the 110. I quite like the iilumo items, even if they're a bit of a premium over other brands. You'll also note the Stedi Fogs, that will go into the S15 fog lights as I needed to match the bulbs since I got the new ones earlier. I hope they fit as the body is quite a bit longer than your normal bulb.  Annoyingly, I managed to trip the fuse, which normally wouldn't be an issue until I located the fuse. I can't say I've ever come across this. I had lucked out that someone nearby had a spare, but oddly enough Toyota dealerships seem to keep this in stock. I ordered some to keep in my stash and as luck would have it, someone else nearby tripped the same fuse so I passed on the favour.  I also did a little service on the 110 ahead of some additional work coming up. It's been annoying that Goleby's stopped carrying this particular HKS filter for the 110, so now I need to keep them on order from Japan. I also took the opportunity to install a bash plate and number plate riser. The plate riser is such a cheap but nice fix to help really tidy up the car. I'm tempted to now also replace my headlights, on this car. Both items were from Project Aero.    I also needed to replace the rear tyres on the 110, and after trying to get it aligned learnt that I need to replace some bushes in the front end, so that's next.  Closing out this update with a nicer picture as always! 
    • Yeah mate, never miss it.
    • Any going to watch World Time Attack at SMSP this year?
    • Appreciate the correction on the "ground", that will make a huge difference to looking at this. That makes complete sense about AF70/AF71 which is what I had come down to being the issue, one of these. I'll have another look in the ignition wiring when I get a chance next week. I'll also make up a jumper wire for running that AF73 test.  ECU is fine, relay itself is fine, pump harness is fine and the pump itself is fine. I am going to upgrade the Walbro 255 anyway with a DW300 I have since I need to replace the fuel sender and I'm going to upgrade the FPR with my chasebays kit ready for new plenum/injectors/dbw, but I'll get this working first. That's why this is so frustrating. 
×
×
  • Create New...