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Buzz6987
16th February 2017, 08:56 PM
Hi guys i have a 04 gu zd30 was driving fine then lost power still got boost checked all vac pipes and intercooler all fine i have blocked egr taken egr butterfly out have also removed mesh in air intake had it on a dyno today and everything came back fine apart for fuel was lean so backed boost off and still no power just happened out of nowhere also no codes been thown can any1 plz help
GQtdauto
16th February 2017, 09:27 PM
Our 2002 model lost power after I cleaned the MAF sensor , turns out there are some things CRC is not good for .
A dirty sensor will give trouble , or if the screw holding wires to sensor has come loose it may give trouble .
Buzz6987
16th February 2017, 10:06 PM
Removed maf and boost sensor cleaned with maf cleaner
GQtdauto
16th February 2017, 10:39 PM
Yeah that's it for me , hopefully someone will be along shortly .
Have you tried looking for related posts ?
Turtle_au
17th February 2017, 04:37 AM
Low fuel pressure? Fuel filter? Bad diesel? Anything changed recently? Do you run ECUTalk or other diagnostics?

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Buzz6987
17th February 2017, 10:08 AM
Low fuel pressure? Fuel filter? Bad diesel? Anything changed recently? Do you run ECUTalk or other diagnostics?

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Have checked filter all clean have no way to check pressure also no i dnt have an ecutalk
mudski
17th February 2017, 12:17 PM
Leaking intercooler? Dud MAF, but an ECU scanner should pick up on that. How done a workshop do a dyno run on a car with no power and say it came up good?
Turtle_au
17th February 2017, 02:09 PM
How did they pick up it was lean? Exhaust gas readings?

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Turtle_au
17th February 2017, 02:19 PM
Error codes only come up if it recognises a fault. MAF could be giving wrong value but not picked up as a fault. You need to get some ECU readings with a scanner.

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Buzz6987
17th February 2017, 04:58 PM
How did they pick up it was lean? Exhaust gas readings?

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Not to sure how it works he had a few wires on the car
threedogs
18th February 2017, 11:01 AM
remove the engine cover and see how oily the IC is.
My 04 was leaking at 185k , if yours is oily it will need
to be replaced with a fully tigged and tested one about $350-$500
If you haven't fitted a boost or EGT gauge yet Id be putting
that high on my to do list.
Its the only way you can "SEE" whats going on under the bonnet

Do one thing at a time that way you'll know what the fault was