Jump to content
SAU Community

Recommended Posts

Most likely you've ended up with a reasonably bad boost leak....do you have a boost gauge, and if so what does it show.

Go back around the whole job and check every hose is seated square, and every hose clamp is tight. The easy way to check a hose clamp is to push hard on the screw part - if it turns on the pipe it is too loose. But even if they are tight, the hoses have to be properly seated on the pipes, ie square on and good overlap

Howdy,

thanks for all your input!

I Double checked the hoses and een had a mate of mine come by after I had installed it yesterday to ensure everything had been connected properly. No problem.

I spent all day wiring up a boost guage (Apexi mechanical) and finally got it to work.

on idle: -0.5 to -0.6

driving: -0.7

OK, so im assuming it should be idling on 0?

Howdy,

thanks for all your input!

I Double checked the hoses and een had a mate of mine come by after I had installed it yesterday to ensure everything had been connected properly. No problem.

I spent all day wiring up a boost guage (Apexi mechanical) and finally got it to work.

on idle: -0.5 to -0.6

driving: -0.7

OK, so im assuming it should be idling on 0?

No, that sounds reasonably normal. Engines are almost always on vacuum (ie less than 0) because they suck air in. the more you open the throttle the more air they suck so the more vacuum you'll see. But with a turbo car of course, as it comes on boost it moves from vacuum (negative) to boooost (positive), but only when the engine is under load.

Unfortunately that means that you need someone to watch the boost guage while you floor it for a while. Up a hill is best because boost builsd more quickly and the car accelerates more slowly.

No, that sounds reasonably normal. Engines are almost always on vacuum (ie less than 0) because they suck air in. the more you open the throttle the more air they suck so the more vacuum you'll see. But with a turbo car of course, as it comes on boost it moves from vacuum (negative) to boooost (positive), but only when the engine is under load.

Unfortunately that means that you need someone to watch the boost guage while you floor it for a while. Up a hill is best because boost builsd more quickly and the car accelerates more slowly.

OK so took it for a drive today and found a steady incline.

During acceleration, the gauge hovered around 0.5 and whilst in 2nd gear at around 3000rpm onwards I could feel the car 'stuttering'.

Thoughts? I think this is getting a bit too over my head for me.

Finished stripping the heads off today and cleaned up the block ready for the new oem head gaskets and L19 studs. It all looks pretty clean in there now, hopefully an oil flush will clean out any residual coolant I haven't managed to get to.

Luckily it looks like just a split head gasket...

post-63525-0-28203100-1338735704_thumb.jpg

post-63525-0-18105200-1338735719_thumb.jpg

post-63525-0-47078100-1338735734_thumb.jpg

Today, i pulled the glovebox apart to investigate what sorts of plug connectors the DVD rom's got, and found the glovebox light was blown. Replaced the bulb, all good now. Also cleaned the pollen filter. Still not able to get the reversing camera wired up as the camera wont work for some reason(ntsc). Also gave it a wash. :yes:

Finished stripping the heads off today and cleaned up the block ready for the new oem head gaskets and L19 studs. It all looks pretty clean in there now, hopefully an oil flush will clean out any residual coolant I haven't managed to get to.

Luckily it looks like just a split head gasket...

Gotta love how E85 keeps the pistons and combustion chambers clean.

Is that the knock sensor in the valley?

Gotta love how E85 keeps the pistons and combustion chambers clean.

Is that the knock sensor in the valley?

yeh i asked him if it was yesterday and yeh apparently it is the knock sensor

yeh i asked him if it was yesterday and yeh apparently it is the knock sensor

What's this Aaron? A non random post? That's not like you...

Yeh Paul, the pistons were only a little coated in carbon, a light spray with gasket stripper had them polished like new.

And yes, that is the knock sensor, not that the Fcon cares about it much.

Finished stripping the heads off today and cleaned up the block ready for the new oem head gaskets and L19 studs. It all looks pretty clean in there now, hopefully an oil flush will clean out any residual coolant I haven't managed to get to.

Luckily it looks like just a split head gasket...

In Pic 1 is that a cast mark on the engine mount or a crack ?

OK so took it for a drive today and found a steady incline.

During acceleration, the gauge hovered around 0.5 and whilst in 2nd gear at around 3000rpm onwards I could feel the car 'stuttering'.

Thoughts? I think this is getting a bit too over my head for me.

could the issues that I have been experiencing be a coilpack issue? I remember experiencing something similar with another car of mine years ago..

In Pic 1 is that a cast mark on the engine mount or a crack ?

Just a casting mark.

could the issues that I have been experiencing be a coilpack issue? I remember experiencing something similar with another car of mine years ago..

It sounds like it, Stuttering is usually either plugs that are fouled or coil packs breaking down. It could also be low voltage/bad connection in the coil loom. Without more information about the car's mods and power level its hard to guess the cause.

Studs turned up today, all went in well bar one, it looks like the thread is a little chewed. :verymad: I will have to buy a long M11 x 1.25 tap tomorrow.

I also match ported the upper and lower plenum halves and throttle, the head ports looked pretty good but the runners were all over the place.

post-63525-0-52140400-1338814373_thumb.jpg

post-63525-0-08143100-1338814687_thumb.jpg

post-63525-0-54349400-1338814723_thumb.jpg

post-63525-0-57822500-1338814741_thumb.jpg

Nope. lol, I don't trust myself around the valves without removing them and I don't want to get a stray piece of alloy in the oil galleries. Do you think it matters? The area of the 6 ports is a crapload bigger than the turbo and wastegate. It should be fine mate. There is definitely a heap of material I could remove there though.

im gonna talk you into it lol..

i think you should.. why not its all apart.. just be a true hampton parker and shove a sock down there and vacuum it out before you take the sock out lol

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

    • Very nice - I also have a 92 GTST and hardly see any others around these days
    • When I need something else to edit, I use Movavi. A friend who does video editing on a daily basis recommended me) it's an easy video cutter to use for beginners
    • I need to edit some videos for work but I'm not good at all this. Which video editor can you recommend?
    • I think you're really missing the point. The spec is just the minimum spec that the fuel has to meet. The additive packages can, and do, go above that minimum if the fuel brand feels they need/want to. And so you get BP Ultimate or Shell Ultra (or whatever they call it) making promises to clean your engine better than the standard stuff....simply because they do actually put better additive packages in there. They do not waste special sauce on the plebian fuel if they can avoid it. I didn't say "energy density". I just said "density". That's right, the specific gravity (if you want to use a really shit old imperial description for mass per unit volume). The density being higher indicates a number of things, from reduces oxygen content, to increased numbers of double bonds or cyclic components. That then just happens to flow on to the calorific value on a volume basis being correspondingly higher. The calorific value on a mass basis barely changes, because almost all hydrocarbon materials have a very similar CV per kg. But whatever - the end result is that you do get a bit more energy per litre, which helps to offset some of the sting of the massive price bump over 91. I can go you one better than "I used to work at a fuel station". I had uni lecturers who worked at the Pt Stanvac refinery (at the time they were lecturing, as industry specialist lecturers) who were quite candid about the business. And granted, that was 30+ years ago, and you might note that I have stated above that I think the industry has since collected together near the bottom (quite like ISPs, when you think about it). Oh, did I mention that I am quite literally a combustion engineer? I'm designing (well, actually, trying to avoid designing and trying to make the junior engineer do it) a heavy fuel oil firing system for a cement plant in fricking Iraq, this week. Last week it was natural gas fired this-that. The week before it was LPG fired anode furnaces for a copper smelter (well, the burners for them, not the actual furnaces, which are just big dumb steel). I'm kinda all over fuels.
    • Well my freshly rebuilt RB25DET Neo went bang 1000kms in, completely fried big end bearing in cylinder 1 so bad my engine seized. No knocking or oil pressure issue prior to this happening, all happened within less than a second. Had Nitto oil pump, 8L baffled sump, head drain, oil restrictors, the lot put in to prevent me spinning a bearing like i did to need the rebuild. Mechanic that looked after the works has no idea what caused it. Reckoned it may have been bearing clearance wrong in cylinder 1 we have no idea. Machinist who did the work reckoned it was something on the mechanic. Anyway thats between them, i had no part in it, just paid the money Curiosity question, does the oil system on RB’s go sump > oil pump > filter > around engine? If so, if you had a leak on an oil filter relocation plate, say sump > oil pump > filter > LEAK > around engine would this cause a low oil pressure reading if the sensors was before the filter?   TIA
×
×
  • Create New...