Can't Find My Vacuum Leak, Help? (Pics)

[Jo33]

Hey guys, I've had a vacuum leak problem or what I think is a vacuum leak problem for quite some time. My engine sometimes hunts, mostly when I take the key out and the turbo timer kicks in. One time I drove out the carwash and my engine was hunting real bad almost cutting the engine and when I put the foot down it just went CHUG CHUG CHUG and struggled to get up to speed with ALOT of fuel spitting out the back. I've ziptied alot of the small hoses coming out of the intake manifold(A 4mm or 6mm line on the back of the manifold allowing my gauge to read something and all hoses that size out of the manifold). I've only worked on marine diesel engines so I have no clue what to look for or what i'm even looking at too be honest haha.

Here's what my gauge reads normally and I would think its meant to be right down on the -7? I'm not 100%

Also i've found these stains on this hose coming near the front of the manifold, the side closest to the rocker cover but I never realised fluid even went into the intake manifold but there is a tiny coolant leak around this area somewhere too I can see a few drops on the block underneath it.

And this screw here(Pipe leads into my radiator) is damaged and not tight but again I don't know if it's even a problem

If anyone could help me i'd be extremely thankful as I have a feeling i'm losing boost pressure due to this aswell and my fuel consumption is effected.

Thanks!

-Joe

EDIT:

Edited June 14, 2012 by Jo33

[scotty nm35]

That loose earth could be the cause of your problems. Get that fixed first.

[StevenCJR31]

sounds like a few problems you have there! the car wash misfire sounds like water on the ignition system, have a look at your coils and plugs and check if water is / has gotten in there

Edited June 14, 2012 by StevenCJR31

[Jo33]

Thanks guys, i'll fix the current issues I can see and tell you how I go

[The Dan]

That earth wire is the main ECU earth. VERY important

Also clamp off the big tube that goes to idle air control. The engine should stall. If it doesn't, you've got a vacuum leak at the charcoal canister. Delete it to diagnose

[GTSBoy]

Lookin gat your vacuum/boost guage......that is a completely normal idle vacuum. You will never see -700mmHg. Usually halfwayish between 350 and 700.

The coolant is normal. There is a coolant blled screw right there (I think it's the 10mm one on the edge of your circle. Open it to bleed, coolant drops out. Normal.

[WMDC35]

maybe swap the earth over to the other hole may get better contact?

[Jo33]

Lookin gat your vacuum/boost guage......that is a completely normal idle vacuum. You will never see -700mmHg. Usually halfwayish between 350 and 700.

The coolant is normal. There is a coolant blled screw right there (I think it's the 10mm one on the edge of your circle. Open it to bleed, coolant drops out. Normal.

Thanks for clearing that up, I've never seen boost pressure measured in mmHg always psi or bar so I didn't know what to expect.

Thanks for all the tips guys once I get home tonight i'll pick up all the gear I need on the way home and hopefully the hissing noise and hunting stops

[DVS JEZ]

It may have something to do with the turbo timer. Try leaving it idle without the timer on. Just leave key on. If it doesnt happen then its the timer

[gotRICE?]

It may have something to do with the turbo timer. Try leaving it idle without the timer on. Just leave key on. If it doesnt happen then its the timer

Id agree with that too. The turbo timer in mine used to make the car revs dip every time it beeped as it counted down. Never figured out why and couldnt be bothered unwirng it so just turned it off and hid it haha.

Edited June 15, 2012 by gotRICE?

[The Dan]

Id agree with that too. The turbo timer in mine used to make the car revs dip every time it beeped as it counted down. Never figured out why and couldnt be bothered unwirng it so just turned it off and hid it haha.

It's called cheap install

[gotRICE?]

yeah your probly right. it came in from Japan like that. Lazy buggers!