Boost/power troubles after EGR and/or new intercooler

[Hodge]

Ok, been away from here a few days now. Hence no replies from me...
Car is booked at a mechanic next week, so he will be running it on a dyno for a bit and see what's happening. I'm bloody happy but pissed off at the same time. I'm happy cause, the car has been running flawlessly last 4-5 days. It's been a rocket! But I'm pissed off that it's been "good", when I took it to the mechanic. It's like going to a dentist with a toothache, and on the way there it completely goes away like nothing happened. It s**** me!

While the car has been running fine lately, it has a different exhaust tone to it. It's like the tone changes when you open and close the needle valve (vanes) of the turbo. It just sounds different, and somewhat has a deeper tone to it? When last Mudski helped me set the valves up, he looked for a specific exhaust note for a rough needle setting. So, some pondering may suggest it's got something to do with the vaccum system slipping? Because the exhaust tone changed when the actually started behaving better ?

Was also talking to the mechanic , about gutting the vaccum system completely, and go for the wastegate setup, as well as a fully tuned chip that he does. He reckons it blows anything else out of the water and the CRD's respons really well. And this bloke knows what hes talking about. So will see how that goes... Obviously all pending what and if he finds with my intermittent power.

@Rumcajs

A lot of valid points there mate.
To answer your turbo question... Something is definitely going on inside the snail. Rattly kind of noise. It is in perfect sync with the turbo spool up/whistle. Very evident when you listen to it through the snorkle. No matter at what setting of the vanes, or vaccum completely disconnected, it makes this sound as it spools up. Once again the mechanic whos seeing it next week will suss it out, but HE personally thinks turbo is fine, even with the noise, since it is after all producing good power sometimes.


Watch this space.

[threedogs]

Guest 4x4 in Fairfield will turn your vacuum turbo into a wastegate style for around $700
less as you already have gauges, Give David,Mick or Peter a buzz

[Hodge]

Well got the car back. Good results. Long story short. He had it on dyno and road tested for a while. Replicated the power loss I had, it had consistency with a limp mode, so we put it down to that. Spent a good amount of time with the dyno guy, and he showed me something I didnt' know. CRD's by default calculate limp mode from a few different variables, like fuel, air as well as boost. It is not only a boost threshold that ticks the limp mode box. For some reason my car ticked all those boxes very often, hence my power loss experience. Anyways... Chip fixed this, one way or another.

Unichip was fitted and programmed from scratch to the car, and the power loss gone away. She goes way better now. Made 100kw at rear wheels, but backed it down a tad afterwards after clipping some high end, for safer EGT's. Wastegate setup was shelved too, as this chip also controls the boost, so for now the needle and dawes are gone as wlel. Chip does a good job at boost, much better than factory setup, however there is some spikes once in a while, which needed to be ironed out. I'll have a go at needle/dawes with the chip now to see if I can smooth it all out. Early days yet. But so far I'm happy.

Attachment 48593

[mudski]

Good to see Eric. So the turbo is not fubar?

[Stropp]

That's good news mate, let's hope you can iron out the remaining small bugs.

[boots]

I hope its happy trucking for you now Hodge , my goodness you have had some pain and suffering along the way and hopefully its all sorted now.

[Hodge]

Good to see Eric. So the turbo is not fubar?

Yeah Mark thinks it's fine and should be the least of my worries for now. So I'll leave it at that.

That's good news mate, let's hope you can iron out the remaining small bugs.

Yeah good news finally, just a tad more fine tuning and she should be ok, I hope.

I hope its happy trucking for you now Hodge , my goodness you have had some pain and suffering along the way and hopefully its all sorted now.

Thanks mate. This chip and dyno as where I'm drawing the line in the sand though. I'm now sort of feeling where Jonothan's frustration was with his car, to the point where it was taking a toll on me and the mrs. I finally drove a common rail the other day, heavier than my one, but with no performance mods. Not even the manual boost setup and it went harder than mine by a long shot. Nearly made me cry ...
So if this process I'm going through now doesn't help, Patrol is gone. I really don't have any more patience, time and $ babying a car just for it to run properly. But I hope it don't get to that.


Needs to go back on the dyno, as there is a few more quirks regarding boost etc.. Especially @90km/h plus. This is the first chip of this model JPC has done on a common rail as it has a few extra things, so my car is kind of like a learning curve guinea pig for them. As I said, she has a heap of power now, down low across most gears, but just needs to be harnessed and spread out a bit and she should be sweet.

[Hodge]

Just curious...

Is there anyone here that has a chip which has control of turbo boost, yet you still by passed that with needle and Dawes ??

Sent from my SM-G900I using Forum Runner

[mudski]

Just curious...

Is there anyone here that has a chip which has control of turbo boost, yet you still by passed that with needle and Dawes ??

Sent from my SM-G900I using Forum Runner

I think the Diesel Smart chip does. Don't quote me on it but I think it does. I don't know how good it works though...

[Hodge]

Well the car was on the Dyno last 2 days again, and the Chip controlling boost was ditched for a waste gate actuator setup. Needles to say, it runs like a dream now. Heap more power and torque wastegate locked to 18psi, and is very consistent throughout the gears and rev range. Very happy so far!