Rb26 Starts Then Dies Out

[RJ06]

Hi guys I'm having issues with my engine,

firstly it starts and runs but when I turn it off its very hard to start.

It needs to be cranked over a while then it will start then die out straight away.

I've opened up the turbo plumbing I can can see a fair bit of oil in the front turbo housing.

Also I opened up the spark plugs and there is quite a bit of oil on the spark plugs.

This is what I'm thinking it might be.

My compression figures are quite low on the 4th 5th and 6th cylinder. Readings are at 60, 75 and 50 psi.

But it runs without a problem when I start it in the morning it's just after I turn it off and leave it for about 30 mins, then it's hard to start up again.

Is there any way I can filter the oil from the intake manifolds? I have been looking at an oil catch but I need some help or any tips if it would help at all.

Cheers!

[DVS JEZ]

Sir RB on these forums is having the same issue with hot start. I have reccomended a new fuel pressure reg but he hasnt tried it yet. He has tried a fair few things.

[RJ06]

Cheers mate, I'll give it a shot tomorrow and I'll see how it goes.

Thanks again!

[DVS JEZ]

Any luck?

[SiR_RB]

my hot starts are shit. cold starts are perfect, its after the car has been driven for abit and then switched off for over 15ish mins that it becomes an ass.

my tune is perfect, plugs are perfect, compression is 160 across each cylinder...

still gotta try new fuel reg, and maybe a coolant temperature sensor too

[nobby]

One problem is, the 1way flow valve (near tank) can sometimes fail and allow fuel in line to drain back to tank and starve engine . my car does this sometimes hot.

But can do it almost on demand if conditions are right.

drive car near sunset, park, allow engine time to heat soak.

Meanwhile outside air temp drops at this time, air pressure in fuel tank also drops and fuel drains back to tank. its dam embarrising.

and you can turn key and won't start and after a while starts and runs rough for a short period then comes good.

I fix it by turning ign key to position where fuel pump starts running (before eng starts) for a few seconds, then start engine.

My mechanic told me about fuel drain back to tank and how to fix, well he said turn key several times but I just hold key part way to starting engine and pump running without all the other functions going on/off, personaly I think this a safer method on cars other systems.

hope this helps.

Edited June 10, 2011 by nobby