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Losing Power and High EGTís
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Old 24-12-2015, 10:17 AM
Supersonic Supersonic is offline
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Default Losing Power and High EGTís

I have just returned from some pretty rough offroading and I suspect something has come
off/unplugged/broken etc.
During the offroading at low speeds but accelerating the only thing I noticed was that there was a lot of air vent noise like the fan was on high. However this continued even with the Aircon off.
Once I was back on the highway the EGT gauge (this was fitted ages ago with a Chipit chip) went to LIGHT ON meaning it disconnects the chip. Ok, so after a bit I remove the chip (which I had set on a low power setting but just enough to assist overtaking when I have the trailer behind.) Well, under acceleration it would still reach max temp.
I started looking for a broken vacuum line, (had that one before when I lost all turbo power) but canít see anything. I had a good look at the air-filter but while it is grubby it is still in ok condition.
The clue is the air noise behind the dashboard.

Any ideas? Iíd be grateful for some tips. Iíve got it booked in with the dealer next week but as we all know this can be an expensive exercise.
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Old 24-12-2015, 10:27 AM
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Sounds a lot like a boost leak.
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Old 25-12-2015, 09:01 PM
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Air intake restriction somewhere?
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Old 26-12-2015, 12:26 AM
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Check your intercooler hoses, it may be a leak there. Going by what you describe it sounds like a boost leak but that won't cause high egt's.
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Old 26-12-2015, 08:57 AM
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I'm thinking a rich condition because of boost leak or massive intake restriction would cause high EGT's and a lot of wooshing noise.
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Old 26-12-2015, 09:01 AM
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Good point from R/C look into that.
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Old 26-12-2015, 11:39 AM
Navara Newbie Navara Newbie is offline
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Sounds like a Boost leak as RC said less air more fuel= high EGT`s
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Old 03-06-2019, 11:40 PM
Been a while Been a while is offline
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Howdy all, got the same issue....

Coming from QLD and same thing, no off roaring though. Started to feel loss of power looked at the egt gauge and its sitting 400 + and really sluggish..
I'm wondering if she'll make it home ?
Really pressing it go past 100 k's and the temp spikes fast...
Got me tossed, idles well , revs well and stand still but not under load ?

Any idea's?
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Old 04-06-2019, 01:54 AM
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Quote:
Originally Posted by Been a while View Post
Howdy all, got the same issue....

Coming from QLD and same thing, no off roaring though. Started to feel loss of power looked at the egt gauge and its sitting 400 + and really sluggish..
I'm wondering if she'll make it home ?
Really pressing it go past 100 k's and the temp spikes fast...
Got me tossed, idles well , revs well and stand still but not under load ?

Any idea's?
Sounds like a boost leak as mentioned above. Either that or your wastegate is stuck open and the turbo isn't building enough boost. You have a zd30 from memory don't you?
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Old 04-06-2019, 02:34 AM
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Quote:
Originally Posted by bods View Post
Sounds like a boost leak as mentioned above. Either that or your wastegate is stuck open and the turbo isn't building enough boost. You have a zd30 from memory don't you?
Yes mate I do own the zd. The gauge is showing boost, in fact it is boosting a little more than usual and boosts up rather quick but no power.. I can get it to sit on 300 egt if I stay in fourth .. 90 ks at 300 egr 3100 rpm 14 to 16 psi .. As soon as I pick up fith it goes through the roof.. Spoke to mechanic over phone and he was suggesting restricted air flow. New air filter and vac lines this morning no change.. Mech thought it may be a butterfly staying closed?????

Last edited by Been a while; 04-06-2019 at 02:37 AM.
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