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Author Topic: TDI Didn't Benefit From Tune  (Read 4097 times)

October 14, 2016, 08:46:49 pm

Jo3kr

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TDI Didn't Benefit From Tune
« on: October 14, 2016, 08:46:49 pm »
Got my TDI tuned by Malone stage 3 and having some problems.

Car is quick when you first get going but quickly loses power and blows a hell of a lot of smoke after about 2k rpm (worse then a big rig) and is extremely slow and sluggish.

I think it was quicker before.

Currently my setup is DLC764 injectors the stage 3 tune with 2.5-3inch exhaust.

Turbo spikes up to 21psi then sustains 15psi which is exactly the same as before except I didn't have such high spikes. After it goes to its sustained psi it smokes like crazy.

Is there something I need to tweak in Vagcom?

I was even expecting after tune to have clutch slip because I pulled 3000 pounds behind this car and had the clutch slipping at times so you'd think the clutch would slip after tune but it isn't.

Any help is greatly appreciated I've tinkered with diesels for years now and was expecting to compete with my brothers m-TDI but it's not even close.


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Reply #1October 16, 2016, 09:22:49 pm

theman53

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Re: TDI Didn't Benefit From Tune
« Reply #1 on: October 16, 2016, 09:22:49 pm »
Maf?

Reply #2October 16, 2016, 09:27:27 pm

Jo3kr

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TDI Didn't Benefit From Tune
« Reply #2 on: October 16, 2016, 09:27:27 pm »
Maf?


I recently swapped that out with a used one in the spring I guess it could be bad. But I think I remember seeing something about its bad if it can't keep speed on a mountain with cruise control and that isn't the case in my situation.

I've been able to get it to hold at 18-19psi now but at that point in time she's blowing *** tons of smoke. My whole backend of my cars black from 40miles of driving.

As soon as I go past quarter throttle she's smoking and gets worse as I put more throttle down.

I've been watching the boost gauge and it's going to 22psi or so then back down to 14 then slowly rises to 19psi and stays.

And it definitely doesn't feel like I'm pushing 235ft pounds (according to Malonetuning)


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Reply #3October 16, 2016, 11:11:57 pm

air-cooled or diesel

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Re: TDI Didn't Benefit From Tune
« Reply #3 on: October 16, 2016, 11:11:57 pm »
do you have vag-com, if you know how to use it, hook it up and check timing is within allowable specs, no check engine light? have vag-com do a diagnostic.

Reply #4October 16, 2016, 11:51:00 pm

Jo3kr

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Re: TDI Didn't Benefit From Tune
« Reply #4 on: October 16, 2016, 11:51:00 pm »
do you have vag-com, if you know how to use it, hook it up and check timing is within allowable specs, no check engine light? have vag-com do a diagnostic.
No check engine light which I assumed the tune would have a factor in it; before tune I did have an EGR code but that's now deleted. I'll check on vagcom and report back.


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Reply #5October 18, 2016, 09:01:45 pm

Jo3kr

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TDI Didn't Benefit From Tune
« Reply #5 on: October 18, 2016, 09:01:45 pm »
do you have vag-com, if you know how to use it, hook it up and check timing is within allowable specs, no check engine light? have vag-com do a diagnostic.

Here's my timing graph; I take it that it's not very in spec.



I deleted the EGR completely today and drove it; car actually seems happier but still don't have the power as it should.

Next project is to clean the intake.

Vag diagnostic comes back clean with no codes although I've had an EGR code come in today from it being deleted which is now cleared.



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« Last Edit: October 18, 2016, 09:04:11 pm by Jo3kr »

Reply #6October 19, 2016, 07:58:30 am

theman53

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Re: TDI Didn't Benefit From Tune
« Reply #6 on: October 19, 2016, 07:58:30 am »
Timing should be up around the green line.

I don't know the hole size of the 764 injectors, but if you are running anything under .216 size the pump will not be able to push the fuel through with a stage 3 Malone.

Reply #7October 19, 2016, 07:46:24 pm

Jo3kr

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TDI Didn't Benefit From Tune
« Reply #7 on: October 19, 2016, 07:46:24 pm »
Timing should be up around the green line.

I don't know the hole size of the 764 injectors, but if you are running anything under .216 size the pump will not be able to push the fuel through with a stage 3 Malone.

They are .230s

The injectors alone should've gave me +25 hp and +50 torque which I definitely felt when I installed them.

Then the tune should've gave me 32hp and 75 torque. I get a sudden boost of power around 2-3k rpm and it will put you into your seat but then quickly dies off and starts blowing smoke.

The EGR delete did help the boost out seems the cars feeding itself a little better and more efficient then before as I'm spiking to 21psi then she goes to 16 and climbs to hold at 19psi instead.

I'm starting to wonder if I'm not getting adequate air I may try slipping on a CAI which wouldn't cost me anything except a MAF adapter just as a test. Even though it's hated around here but mines already Swiss cheesed.

But anyways like I said I had the clutch slipping hauling around 3k pounds on the mountains which served me to believe Im due for an upgrade but the tune doesn't even come close to slipping it.

On a side note Malone is sending a stage 2 to see how the car reacts to it.


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« Last Edit: October 19, 2016, 07:54:10 pm by Jo3kr »

Reply #8October 21, 2016, 11:14:44 pm

theman53

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Re: TDI Didn't Benefit From Tune
« Reply #8 on: October 21, 2016, 11:14:44 pm »
The timing will help a bunch or should

Still the vnt 15? Does it work properly? Sounds like it might not if you are losing some.

Reply #9October 22, 2016, 04:06:47 pm

vanbcguy

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Re: TDI Didn't Benefit From Tune
« Reply #9 on: October 22, 2016, 04:06:47 pm »
The factory airbox flows more air than any aftermarket CAI. That isn't your problem. If you're blowing black I'd be looking for a boost leak somewhere - intercooler pipes, etc.

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Reply #10October 23, 2016, 03:39:58 pm

Jo3kr

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TDI Didn't Benefit From Tune
« Reply #10 on: October 23, 2016, 03:39:58 pm »
The timing will help a bunch or should

Still the vnt 15? Does it work properly? Sounds like it might not if you are losing some.


No this is the T3 I believe whatever came stock on the 1z and I believe it might be original with 250k on it (I bought the car with no prior knowledge of what's been done)

The factory airbox flows more air than any aftermarket CAI. That isn't your problem. If you're blowing black I'd be looking for a boost leak somewhere - intercooler pipes, etc.

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I'll have to check those too maybe a project for today or tomorrow.

The Malone stage 2 helped with the smoke but she's still a dog. I'll check then pipe work and report back.

Mileage is dropping like crazy too now; it's down to about 35mpg and that's with babying it on 55 miles one way to work.


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Reply #11October 23, 2016, 06:33:51 pm

Jo3kr

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TDI Didn't Benefit From Tune
« Reply #11 on: October 23, 2016, 06:33:51 pm »
Checked for boost leaks all hoses and pipes seem okay.


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« Last Edit: October 23, 2016, 07:11:55 pm by Jo3kr »

Reply #12October 23, 2016, 10:21:57 pm

vanbcguy

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Re: TDI Didn't Benefit From Tune
« Reply #12 on: October 23, 2016, 10:21:57 pm »
Plugged up intake would be another prime candidate!

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Bryn

1994 Jetta - AHU M-TDI - Jezebel Jetta
2004 Jetta Wagon - 1.8T - Blitzen

Reply #13October 24, 2016, 03:46:40 am

Jo3kr

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Re: TDI Didn't Benefit From Tune
« Reply #13 on: October 24, 2016, 03:46:40 am »
Plugged up intake would be another prime candidate!

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I would agree that's a good candidate but I'm trying to hold off on doing that! Lol; however I do got the EGR deleted so it can't get any worse I'd imagine and it's actually not nearly as bad as the other peoples I've seen from the little bit I can see.

I'll move onto timing tomorrow and report back. Thanks for your help guys!


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