1G Violent cutout of boost at WOT

[AngryTalon]

As the title says, that's about the only way I can describe it. During near to WOT (in gear) the rpms in the 4-5k range, pulling about 14psi, the engine will suddenly cut out and in of power with quite a jolt. I don't have datalogging capabilities, and the only extra gauge is a vac/boost. It appears the boost needle reacts with the engine as this happens. Could this be a problem with the wastegate?

 

[93 talon tsi awd]

What fuel mods are in the car?

i just got the car a week ago, im not sure what exactly has been done to it i know it has a aftermarket fpr but i think it has stock inj, etc

 

[pauleyman]

Post a log. The log will give us a clue what's injectors are in the car. If you're running stock injectors on a 16g, yup that's fuel cut. Ecu will see that much air and shut it down.

 

[93 talon tsi awd]

Post a log. The log will give us a clue what's injectors are in the car. If you're running stock injectors on a 16g, yup that's fuel cut. Ecu will see that much air and shut it down.

I'm not sure how to save a log to where I can share it on here

 

[steve]

I'm not sure how to save a log to where I can share it on here

Would you believe using "Add Photos"?

 

[93 talon tsi awd]

Would you believe using "Add Photos"?

, i cant find it in the files i mean. idk how to get them from dsmlink to here

i found it...my bad

 

[1990TSIAWDTALON]

It appears to have 600-650 injectors in it.
You need to manually adjust the TPS to display .63v closed.
You also need to setup your wideband to log so you can see your AFR's in the log.

 

[93 talon tsi awd]

It appears to have 600-650 injectors in it.
You need to manually adjust the TPS to display .63v closed.
You also need to setup your wideband to log so you can see your AFR's in the log.

im new to the tuning aspect, how would you go about doing that? and i thought i had afr in my log idk how to set up the wideband or if i even have one tbh

 

[steve]

I wonder if this is another failing Omni MAP sensor?

I don't see the ECU engaging Fuel Cut but you can see the airflow and injector pulse width start bouncing almost like the ignition was cutting out on it's own.

 

[93 talon tsi awd]

I wonder if this is another failing Omni MAP sensor?

I don't see the ECU engaging Fuel Cut but you can see the airflow and injector pulse width start bouncing almost like the ignition was cutting out on it's own.

so i didnt have a fuel cut in that log that was after i lowered the boost but it happened twice to me when it didnt log when it happened, my oil cap blew up an spewd oil all over the engine bay i think my pcv valve might be bad or it could be the fact it vents to atmosphere and doesnt have a vacuum to the intake

 

[1990TSIAWDTALON]

Don't have a FIRE!!! Get a spring and a hose clamp and attach the spring to the dipstick then attach the other end of the spring to the dipstick tube with a small hose clamp to hold the dipstick in. It is from crankcase pressure and you should have a working PCV system, which would help but probably not overcome the crankcase pressure.
Your wideband needs assigned on the ECU inputs tab under "ECU CONFIG (log) tab at the bottom of your log.

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[93 talon tsi awd]

Don't have a FIRE!!! Get a spring and a hose clamp and attach the spring to the dipstick then attach the other end of the spring to the dipstick tube with a small hose clamp to hold the dipstick in. It is from crankcase pressure and you should have a working PCV system, which would help but probably not overcome the crankcase pressure.
Your wideband needs assigned on the ECU inputs tab under "ECU CONFIG (log) tab at the bottom of your log.

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Ill get that done tonight, oddly enough my oil cap was the thing to pop, the metal insert that holds the plastic cap on broke off and disappeared thankfully didnt go inside my head, do I just automatically have wideband? All I have to do it set it up?

 

[1990TSIAWDTALON]

Your profile and log show a wideband but it isn't set up to capture data.

 

[Vegas Smith]

The TPS is behaving strangely. I'd like to see what the MAP and wideband are doing but I'm not going to hold my breath on you figuring that out. If the car does act normally at less boost then it throws my TPS theory out the window.

 

[93 talon tsi awd]

The TPS is behaving strangely. I'd like to see what the MAP and wideband are doing but I'm not going to hold my breath on you figuring that out. If the car does act normally at less boost then it throws my TPS theory out the window.

after lowring the boost it doesnt act up or fuel cut but im having a problem with what i believe to be pcv system, so i traded for this talon a little over a week ago and from what ive learned on the forums it looks like im missing the vaccum line that goes from the vc to the inlet before the turbo? right now it goes straight to atomosphere has pcv valve that is connected to im but i dont know how to tell if its bad, i will try to get wideband set up and post a log tonight

 

[93 talon tsi awd]

here's a log from today after setting up the wideband just went for a cruise to get gas down the road

 

[steve]

Once your car warms up try turning the BISS screw in a bit to see if you can get it to idle @ 950 RPM like you have it set for.