Problems with DTS on GQ

[JZY GQT]

Hey all i'm new to this forum and to 4wding but it is fun and i love it!!
I have a 91 gq patrol 4.2td with a dts water cooled turbo on. The problem is it goes like a stock patrol (compared to my brothers full exhaust system 4.2d)

Is there any problem wit the dts system or anything i could do to get it up and going. I went to a turbo place and he said he knows how to get them going but he won't tell me what he will do and it will cost me $1500 to bloody fix it.

I'll post pics of my rig up soon.

[Muckinhell]

Take it to a dts service centre and see what they say. They should know exactly and if there resonable just adjust it if thats all that needs doing.

you could get it intercooled for about what the other mob want to fix it for.

[chuckybear]

I have a DTS on my 1hz cruiser.
It is running 18psi with compensator and intercooler.
Goes like the clappers.

As already said, see a DTS installer, or a few more turbo places.

I would never take my car to a place that refuses to tell me what they are going to do, and for $1500 I would expect a hell of alot more than a tune.

[Grimsey]

buy a boost gauge and see what boost it is makeing. the DTS kit on my cruiser was factory set at 10psi, id say nissans would be the same. if its making 10psi then its not getting enough fuel. so take it to a diesel tuning specialest and they will be able to get it going good. shouldnt be anymore then 300 bucks if thats the problem.

[sudso]

It might not be the turbo at all. It could be the injector pump needs tweaking, or fuel filter, or injectors etc.
Like the others said take it to an authorised DTS (now MTQ) fitter centre and ask them to tell you exactly what is wrong and what needs fixing.
I've got the same turbo on my GQ TD42 and it goes a lot damn quicker with 35" tyres and 4.1 diffs than my mates non turbo 4.2 with 33's, so yeah something doesnt sound right.
Wait till Peter @ Aawwen sees this, he'll fill you in;)

[Peter @ Aawen4x4]

But I gotta ask first, who did the install??

Did it get a full Diesel Tune-up or Diesel Dyno-Tune at the same time? That sort of treatment at the same time as fitting/installing the Turbo can make what is 'just a turbo fitting' into 'the greatest thing you've ever done!' But not doing the upgrades properly when doing the fitting can leave you risking major damage to the motor, and really lacking the power you expected!!

Everybody is right tho'! Talk to MTQ, get them to check it out, or at the very least go over the install to make sure it all happened the way it should!

[JZY GQT]

I bought the car with the dts kit on it so i don't know who did it, i put a boost gadge on it and its runnin 10psi! when ya drive it you can't even tell when the turbo is kicking in. It's got 285/75/16 coopers s/t on it so the tyres r small enough. The engine has 210,000kms on it (genuine).

I want to know if i could take the air filter from the top of the engine off and put the air filter behind the headlight on and straight to the turbo. Would that make a differance??

[Peter @ Aawen4x4]

Moving the air filter like that won't make the turbo work any better, the DTS guys genrly have a well designed package that took the airfilter going up to where it's been moved to into account. There is a reason it's there, moving it anywhere else will create other issues!! Besides, 10psi boost is good for a 'soft blow' boost, they normally call for about 7.5 to 8.5 psi and once the fuel's set up proply, it should make it hum!!

Since yours obviously doesn't, I'd guess that the turbo tune that is meant to happen once the turbo is fitted hasn't actually happened, and that getting it done properly is probly the most critical thing you can do right now!! Who's nearby? Any Diesel Dyno places, Cooma Diesel, Berrima Diesel, any of them or that sort of place would help!! They should be able to set things up proprerly and give you the best power/torque capability you can expect from that fuel/air mix as adjusted!! Just don't get in the way!

Enjoy!

[B dust]

My GU runs a DTS kit and I just had it dynoed and tuened at JPC its realy putting in now. Easily overtaking other vehicles in 5th gear and hills are nolonger a hassel. Its putting out about 105kw with 285s on. If in melbourne area I would recomend them.

[JZY GQT]

Thanks guys, sorry i am in Boronia Victoria and yeah going up hills is a bi*** gotta go back to 3rd on some hills on wellington road.

Would i be hurting the engine or anything else if the tune hasn't been done? like i said i bought it as is and i've had it for bout 3 months!

[bshslt]

Diesel tech in lilydale

[Peter @ Aawen4x4]

Thanks guys, sorry i am in Boronia Victoria and yeah going up hills is a bi*** gotta go back to 3rd on some hills on wellington road.

Would i be hurting the engine or anything else if the tune hasn't been done? like i said i bought it as is and i've had it for bout 3 months!

In the short term (3-6 months or so) probly not a major issue, but don't leave it too long! Over fuelling can wash down the cylinder walls, and under fuelling can damage valves and cylinders in the long run too!! Better get onto it as soon as you can, certainly within the next few months!

[sudso]

My GU runs a DTS kit and I just had it dynoed and tuened at JPC its realy putting in now. Easily overtaking other vehicles in 5th gear and hills are nolonger a hassel. Its putting out about 105kw with 285s on. If in melbourne area I would recomend them.Sounds about right then. When the previous owner of my GQ had the injector pump rebuilt about 2 and a bit years ago they dynoed it and it was 100kw in 4th gear, with the 35's on and the stock 4.1 diffs. And torque from 1000rpm upwards that puts standard GU 3.0's and 4.2's to shame :D

[1TUFFGQ]

There is a place in Bayswater that is meant to be good with turbo deisels. i will find the details and post when I get them.

[JZY GQT]

Well ppl thanks for all your help. It help me narrow it down and figure out the problem. Went to Rankin deisels in bayswater and he said straight up just looking at it that i have got the stock injector pump and i need the turbo compensator to get it boostin.

Now i just have to find a turbo injector compesator and bolt that on and get a tune. Does anyone know if a factory one would fit??

[JemmyBubbles]

Mate no someones talking sh@$ to you again.

My turbo runs around 12 ish psi and I have the stock injector pump. I have 35's on and it runs very large rings around stock TD42's on standard tyres ie; it pwns. Somethings wrong if you are changing down to 3rd to get up hills.

Unless you are running an incredible amount of boost you shouldn't need a larger plunger in your injector pump nor the boost compensator.

[JZY GQT]

well thats good to know but should i just get a tune then coz i don't go all that great on 10psi.

JemmyBubbles wot turbo u runnin on wot engine??

[Peter @ Aawen4x4]

I think Jemmy Bubbles is right JZY, there are a whole heap of turbos out there running on std injector pumps & plungers AND without boost compensators that are running absolutely fine!? And I don't think you are actually running at all properly on 10psi boost!! So get that sorted so that the turbo is doing its best with what it's got before you start changing all the settings!!

[JemmyBubbles]

Turbo Glide Kit on the TD42 engine.... Ball Bearing Garret (part no would be on their website) and doesn't have water cooling, K&N air filter and a 2.5" exhaust.

Basically I put the thing on myself and paid someone to tune it. Basically he played with the wastegate so full boost comes on at around 1900rpm and upped the fuel a bit.

[Patrolling Paddy]

Turbo Glide Kit on the TD42 engine.... Ball Bearing Garret (part no would be on their website) and doesn't have water cooling, K&N air filter and a 2.5" exhaust.

Basically I put the thing on myself and paid someone to tune it. Basically he played with the wastegate so full boost comes on at around 1900rpm and upped the fuel a bit.

I'm intrigued! I'm no expert but it is my understanding that the wastegate is to adjust the boost pressure and more fuel added quickly will bring the boost on earlier, wich is why a boost compensated setup will have less black smoke but will take longer to spool up (and mine without blows black smoke full on while accellarating, but spools up nice and quick)??
If playing with the wastegate can alter the revs that the turbo reaches full boost please tell me more so I can adjust mine

[JemmyBubbles]

LOL I have nfi how the things work to be honest, thats why I dropped it off to a blike that knows what he is doing ;D The instructions I got from the turbo glide guy where to adjust wastegate so x psi is achieved at xxx amount of revs.

Mine does the same as yours, thats is if I give it a bit of right boot it spews black smoke on accelerating, but once it's boosting it's fine - maybe even a little lean in the higher rev range. A modified plunger in the fuel pump and boost compensator/aneroid-doovy is always going to be the most elegant option, but it's a bit $$$$. Kind of like adjustable panhards with a 3" lift.

[Patrolling Paddy]

I've stayed away from the boost compensators as the purpose of these is to limit the fuel delivery untill the boost can support it. The trouble is that to have boost you need fuel so it takes awhile for the boost to kick in as the fuel is limited till the boost is up.
My old apprentice master used to be a fuel injection wiz at some diesel place here in WA and I learnt a little from him but it seems to be a very indepth and precise art that even the slightest thing can have significant results. Best we leave the tech stuff to the guys with all the gadgets.

Sorry to swerve off path. That is unless it is a compensator causing lack of fuel???

[HDJ105]

I'm intrigued! I'm no expert but it is my understanding that the wastegate is to adjust the boost pressure


Correct, the wastegate only controls the peak boost pressure!


and more fuel added quickly will bring the boost on earlier, wich is why a boost compensated setup will have less black smoke but will take longer to spool up (and mine without blows black smoke full on while accellarating, but spools up nice and quick)??


Correct again. More fuel = more heat = more energy to drive the turbine.

The BC works as you describe, but if it's adjusted correctly there should be a happy medium between no smoke and suitable turbocharger response.


If playing with the wastegate can alter the revs that the turbo reaches full boost please tell me more so I can adjust mine

Nope, its the turbocharger type and sizing, along with the fuelling that dictates the response.

[JZY GQT]

Thats cool so i should just get someone to tune it??

Coz he wanted $2,700 at rankin and he wanted to rebuild the pump with boost compensator on new injectors and a dyno tune!!. I told him to get stuffed.

[HDJ105]

Thats cool so i should just get someone to tune it??

Coz he wanted $2,700 at rankin and he wanted to rebuild the pump with boost compensator on new injectors and a dyno tune!!. I told him to get stuffed.

Maybe you had already used some attitude on him?

Some things in life you can't do yourself, and you need to pay others to do. You can't expect someone in business to do stuff for nothing, and I'm sure he would have given you the quote based on the information you presented him, as in kms travelled, the symptoms, the service history (or lack thereof), etc.

For them to just adjust your fuel and send you on your way, then you have an engine failure and come back to him for warranty (because say your timing wasn't advancing and / or you had an injector not atomising and the EGT's skyrocketed and melted a piston) would be rather silly wouldn't it?

[JZY GQT]

So i should just go and get a tune and not worrie bout the boost compenstator??

[Dave_STR]

Look around some more and find someone that everyone recommends.

[JZY GQT]

Well i talked to another diesel mechanic and he said you don't need a BC just tune it and play wit the injector pump?

Anywhere in Boronia ( Vic ) there is a diesel mechanic that anyone recommends??

[TonyH]

JZY, can you keep us posted on this as I'm in the market for a turbo set-up and doing a bit of prior research.

Cheers

Tony