Help /advice on gu lacking power

[Samantha Kidd]

Wondering if anyone can help I have recently bought a 2005 GU coil 4.2tdi (manual) only 220 on the clock, she really lacks power in lower gears .. sluggish ! love everything about her so hoped someone may have experienced the same . My partner has 79 series landcruiser which flies past so you can imagine the comments I get :( any advice appreciated before I go to a mechanic so at least I can have some idea being a girl 👧 lol

[GQtdauto]

Sons absolutely flys down low and no expert but I'd find out what the boost pressure at the turbo is apart from the usual airfilter etc .

[MudRunnerTD]

Wondering if anyone can help I have recently bought a 2005 GU coil 4.2tdi (manual) only 220 on the clock, she really lacks power in lower gears .. sluggish ! love everything about her so hoped someone may have experienced the same . My partner has 79 series landcruiser which flies past so you can imagine the comments I get :( any advice appreciated before I go to a mechanic so at least I can have some idea being a girl �� lol

Likely it has never been touched out of the factory. They are a bit of a slug. But... I mean BUT. They respond very well to a decent dyno tune for a start.

Fit an Exhaust temp gauge and a boost co trolled and have it tuned for the first win.

Remember your BF has a 4.5 V8 and you have a 4.2 straight 6. His will be stronger but you have way way more potential than he does.

Start with a decent tune. Then come back and say g'day and we can help you spend some cash to make him squirm... lol

He has a V8.... But it's a little V8. V8 Toyota driver's are wankers who think the end of the sentence is V8. Td42s are a Beast motor when the right mods are done.

Welcome here.

[Hodge]

Yup as Mudrunner said, a nice tune, and from there on, there are things that can make them absolutely sing. Exhaust, larger intake and then from there with some more $, but not necesary a better turbo and pump will blow the tits off any 1VD-FTV.

[Touses]

'Tis true! Mine is fairly mild, won't beat the 'crab off the mark but annoys the shite out of 'em when I'm trying to park on their tray at 130k

[Cuppa]

Check out my post from 3 years ago. A 3" exhaust & dyno transformed my '06 TD42i from a piece of wet lettuce into the car it should have been off the factory floor. It is still no 'speed machine', but I love it.

http://www.nissanpatrol.com.au/forums/showthread.php?32833-Genie-Performance-pipe-on-my-4-2-ute&highlight=Dyno+exhaust+cuppa Post #8

[Bundy1]

Sounds like a stock gu 4.2 to me...when I originally bought mine I came from a bt50 with a lot more power and a lot more earlier power in the rev range...so the patrol disappointed me the main thing I hated was how much turbo lag the patrol had 2000rpm was jsut to late for the power to come on...did a lot of reasearch and ended up fitting a p4x4 16g turbo Which transformed the car power was a lot earlier around the 1700-1800 range and with a tune they come onto power even earlier...

[shakey55]

I’ve got an ‘05 4.2td wagon had since new. Never had anything done other than a 2” lift.

Around the 210000km mark I found it under power towing my heavy camper trailer.

Took it to a reputable diesel bloke in Narellan and had a good talk.

Fitted 3” dump pipe, 3” Redback exhaust, new injectors and dyno tune.

Result = a powerful new truck.

This was my experience, but you may be different.


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[Seafarer]

I’ve got an ‘05 4.2td wagon had since new. Never had anything done other than a 2” lift.

Around the 210000km mark I found it under power towing my heavy camper trailer.

Took it to a reputable diesel bloke in Narellan and had a good talk.

Fitted 3” dump pipe, 3” Redback exhaust, new injectors and dyno tune.

Result = a powerful new truck.

This was my experience, but you may be different.


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How much did that set you back in $?

What sort of results did you get on the Dyno?

[shakey55]

How much did that set you back in $?

What sort of results did you get on the Dyno?

It’s on long ago to remember the exact cost but I do know that it was reasonable for what was done. I’ll look for receipt, but don’t like my chances.

This was the dyno print out and I have been very happy with the vehicle’s performance since having this little bit of work done

http://www.nissanpatrol.com.au/forums/images/imported/2020/05/34.jpg


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[Seafarer]

Thanks mate.

I thought a stock TD42T without intercooler outputs 91kw and 330Nm why does yours baseline at 65.6kw and 250Nm?

[mudski]

Thanks mate.

I thought a stock TD42T without intercooler outputs 91kw and 330Nm why does yours baseline at 65.6kw and 250Nm?

His will be intercooled being a 2005. Those numbers he has a measured is at the wheels, the stock figures you have seen would be from the flywheel I am assuming. There is a percentage loss through the drivetrain but not sure of how much. But yeah those figures just don’t look right to me.


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[shakey55]

His will be intercooled being a 2005. Those numbers he has a measured is at the wheels, the stock figures you have seen would be from the flywheel I am assuming. There is a percentage loss through the drivetrain but not sure of how much. But yeah those figures just don’t look right to me.


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I have little knowledge in this area. This is what I was given after work completed.

To help educate me, what doesn’t look right and what should I be seeing.

Thanks


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[mudski]

I have little knowledge in this area. This is what I was given after work completed.

To help educate me, what doesn’t look right and what should I be seeing.

Thanks


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The before and after power output figures. Just seems way too low. Out of the crate this motor is 118kw/ 330Nm.