2G Bucking/ jerking

[97eagletalontsi]

I went back to a stock turbo on my 97talon tsi, from a td05 turbo. Now I have compressor surge and a hard violent bucking in any gear on/off throttle. Does it more so when I get into boost and let off slowly.
Any help would help new to dsms

 

[pauleyman]

Post a profile please. Changing turbos wouldn't do this. You changed something else if it was fine befire.

 

[97eagletalontsi]

Post a profile please. Changing turbos wouldn't do this. You changed something else if it was fine befire.

Didn’t change anything else. It had a 16g on it I went back to oem, bought it that way. It seems like it has compression surge, but I did everything to try and get rid of it.

 

[pauleyman]

Is the bov working properly?

 

[97eagletalontsi]

Is the bov working properly?

Yes, I have set it all the way soft, and all the way hard and went in between, it’s a recirculating one. Not a vent to atmosphere.

 

[chrysler kid]

Yes, I have set it all the way soft, and all the way hard and went in between, it’s a recirculating one. Not a vent to atmosphere.

seems like you have a vacuum leak. the t25 has a vacuum port on the housing you should have it connected to the wastegate

 

[97eagletalontsi]

seems like you have a vacuum leak. the t25 has a vacuum port on the housing you should have it connected to the wastegate

This turbo doesn’t have one at all! I looked. I had to put a fitting on the charge pipe that’s going into the turbo.

 

[chrysler kid]

This turbo doesn’t have one at all! I looked. I had to put a fitting on the charge pipe that’s going into the turbo.

should have one. i think you missed it

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[97eagletalontsi]

should have one. i think you missed it

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My turbo is a bit different than that one

The holes are for wastegate bolts and another bolt non go thru the whole way

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[Justin DuBois]

That is a typical 14b, maybe 13b - I can't see the stamped number on the cover. If you can clean the part that says - 19178-0xx0, that will tell you more. This is not the stock turbo for this car, and you probably have after market inter-cooler pipes - especially if you have a BOV that is adjustable. Stock BOV is not adjustable (and plastic)

 

[97eagletalontsi]

That is a typical 14b, maybe 13b - I can't see the stamped number on the cover. If you can clean the part that says - 19178-0xx0, that will tell you more. This is not the stock turbo for this car, and you probably have after market inter-cooler pipes - especially if you have a BOV that is adjustable. Stock BOV is not adjustable (and plastic)

I just made my own bung on the intercooler piping, I tried and tried to look on the turbo and can’t find any. It seems to of fixed the bucking! Now another problem I tried to fix, the car takes forever to start when it’s cold not the weather just the car in general, but if it was recently ran it starts up just fine

 

[Justin DuBois]

I just made my own bung on the intercooler piping, I tried and tried to look on the turbo and can’t find any. It seems to of fixed the bucking! Now another problem I tried to fix, the car takes forever to start when it’s cold not the weather just the car in general, but if it was recently ran it starts up just fine

Sounds like fuel supply check valve issue. Fuel may be draining from the fuel rail back to the tank, making it take longer to prime when cranking.

 

[steve]

That looks like "g" style blades on the compressor but @JusMX141 would be the one to know. As noted it's not a T25.

 

[97eagletalontsi]

Sounds like fuel supply check valve issue. Fuel may be draining from the fuel rail back to the tank, making it take longer to prime when cranking.

I have checked that I had a P0170 code and fixed all of that stuff sensor, solenoid, etc.

 

[chrysler kid]

I have checked that I had a P0170 code and fixed all of that stuff sensor, solenoid, etc.

What's the definition for P0170, I don't feel like googling it to see what that means?

 

[97eagletalontsi]

what's the definition for p0170, I dont feel like googling it to see what that means

Fuel bank 1

 

[pauleyman]

so you did or did not fix this?

 

[97eagletalontsi]

I did fix the bucking

 

[dwb]

Now another problem I tried to fix, the car takes forever to start when it’s cold not the weather just the car in general, but if it was recently ran it starts up just fine

Fuel pump is possibly leaking at the o-ring/upper cap. This will allow the entire fuel line to drain back into the tank.
Take a look at the Walbro vfaq here, almost all the way down the page (3rd description from the bottom): http://www.vfaq.com/mods/pump-WB-2GFWD.html

 

[pauleyman]

I did fix the bucking

Do you still have a code?

 

[chrysler kid]

Fuel bank 1

fuel trim could be related to front oxygen sensor

for the best definition go to this website for the factory service manual, then select diagnostics and see the factory flow chart for the error code

Www.charm.li

glad to see youre making progress!