Losing boost..

[mullet_hunter]

Hi fellow patrol owners... went to jump in my bus this arvo..went fora drive and it seems like it won't boost past 2000 rpms...goes up to and 5-7psi then will drop off to nothing.. After 2000rpm it's got no balls... Is this what they call limp mode? Zd30..

[AB]

Hi fellow patrol owners... went to jump in my bus this arvo..went fora drive and it seems like it won't boost past 2000 rpms...goes up to and 5-7psi then will drop off to nothing.. After 2000rpm it's got no balls... Is this what they call limp mode? Zd30..

hopefully someone with a zd30 can help mate but it sounds like a leak and not holding pressure in my opinion. Check every connection from turbo to inlet manifold.

See if you can see any carbon deposit on any hose seals too?

[mullet_hunter]

Ye if feels like it's leaking boost.. Like when a hose comes off the intercooler.. But it's not blowing any black smoke and hoses look alright... Will need to have a better look over the weekend..

[mudski]

Whats it like prior 2000rpm? Cleaned the maf lately. Could be a boost leak. Condition of the intercooler? Is it oem or aftermarket? Any oil leaking from the intercooler?

[mudski]

Also what about the fuel filter. Last changed? When you get limp mode if you let off the go pedal and back on again it goes away.

[mullet_hunter]

Ye it seems if u let off the gas pedal then it will boost to arnd 2000rpm.. then nothing over that... is this what they mean by limp mode.. im just a bit dumb founded how its just happened nw.. been running 27psi befor with no dramas no i cnt get it to boost much over 7 to 10psi...

[mullet_hunter]

Mafs clean.. new fuel filter when i done injector pump few weeks back.. will have to have a better look into the weeknd...

[MudRunnerTD]

Split hose for sure mate.

[mullet_hunter]

Ye it drives and feels like the same as if it blows the intercooler hose off but no black smoke.. and hoses and clamps look tight n all in place...

[threedogs]

With MR possible hose split or from running big boost split the IC open a bit more.
You can remove the IC and check in water with a bike pump, make sure its dry before you replace
it a hair dryer will help.
At Mudski MH is running a HPD Maf housing, you mentioned a
while back they should eliminate all over boost probs?