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Somewhat of a newbie here! With a question about Knock..

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94TSiBeast

Proven Member
96
7
Sep 24, 2014
Indianapolis, Indiana
So I have a 94 talon tsi. It has several mods done to it, and the stock boost gauge is wired up to read Knock. So every once in a while when I'm driving the stock boost gauge spikes (reading knock) and the car has like no power when this happens. Then it goes away after a min. This happens under normal driving conditions, and sometimes when I try and accelerate. When it happens I let off the gas because I'm sure its not good.. But my question is what is causing this to randomly happen? Some days it happens alot, other days it never happens, or may not happen for weeks at a time. .. So I'll list my mods so that maybe that will help. Also the car is an auto.

16g turbo
680cc injectors
ECU Chip tune
2g Maf
2.5 intercooler pipes/ Big front mount IC
Full 3in. exhaust
Tubular manifold
3in. o2 housing with open dump
255 Walbro pump

I'm probably forgetting somethings, but thats most of it. So if anyone has any insight on whats causing my issue please let me know!! Thanks.
 
Must have too much torque when launching :p After all its an auto and I was seeing 20-25 pounds of boost before letting off the brake LOL. I really hope drilling and tapping it works.......
 
So we have the drilling and tapping idea, what about removing the drivers side axle and sticking something long through and tapping it out that way?? Didn't know if that was possible or not.
 
That the first thing I thought of was pulling the other side axle and using a rod or screw driver to knock it out from the other side. The cross pin for the pinions will be in the way but I'm thinking there should be 1/4 of an inch clearance between the pin and splines. Or.. Weld a bolt or any thing on to the broken spline and pull it out from that, assuming drilling it isant going to go to smooth depending how hardened they are. If you were going to try to weld on it assuming you have welder access I'd put some heavy grease on the seal to help protect it from heat/sparks.
 
Here's a picture of my spare trans (2g 5speed awd) there's a axle in the other side so this should be what you have to work with if you decide to pull the other side.
 

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Wow just read that thread Doug..... So what do you think we should do? Sounds like we can't drill it? Doesn't look like much room to punch through either......
 
Welding a bolt seems to be the best bet, but access to one is a different story!

Thanks so much for that picture xiteamxi !! I was looking for that for the past few hours. I can't see how people have punched it out..
 
Yeah welding really isn't an option.. Unless someone has one they can bring over!! Or unless JB weld would work,,, I highly doubt it would LOL
 
The picture is deceiving because of the depth but it looks do able to knock it out from the other side. I highly doubt jb weld would do much even when the axles are intact some times they need some motivating to pop them out. As I said there's a axle cup in the other side of that trans so In the picture the two shiny spots on each side of the pin is what you will need to hit.

I can even try it on my spare trans tomorrow to see how smooth it works out of the car.
 
If you could do that and tell us what you used to knock it out that would help us ALOT!!!
 
Wow I cant believe the axle broke. Worse case is you have to remove tranny and break it open. Hope you can get it out without going that route though

I have a spare tranny I will look at too to see if I can come up with an idea and too see if you can punch it out through other side
 
Gotta say you guys are WAY more helpful than any body ever was on the supra forums back when I owned supra's!
 
Well I just looked at my spare. I couldnt find anything small enough to fit through from other side. Looks like you need to try and drill and tap or weld something to it. If you dont need this car then you could drop tranny and pull it apart and pop it out that way or find and buy another tranny
 
Alright, looks like we will attempt the drill and tap first. Will probably be a few days before we can try it though.
 
Just make sure you use the biggest strongest bolt you can fit. Maybe put a few washers to pry against and use the forked end (for nail removal) or a small pickle fork and pipe, and enriquez2000 said it, I do the same thing using the jack handle as leverage. Oh and maybe rent a slide hammer and if you guys get in a jamb you can call me too ( wish I had a dsm friend around here too) but I'm in Ri, names Chris 401-300-6865. We'll Skype or what's app if we gotta! Oh and listen to rough about a/z parts, I used to work there and it's hit or miss and you don't wanna do this again LOL!
 
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Yeah the idea is to drill into it, tap it, and use a long threaded rod stock that you can get from Home Depot and thread it in. Then find something heavy that can be used as a slide weight on that threaded rod. Put nuts and washers on the end to slam the wieght against. My only fear is not being able to drill into with an electric drill if the metal is to hard....
 
Well I did try it on my spare trans and it went smoothly. (Poped it out 4 times to make sure) used a 3/16 flat head craftsman screwdriver 5 1/2 long and a rubber Mallet. Not much effort required honestly way less then what's needed to pop them out normally with a pry bar ect.
 
Well I did try it on my spare trans and it went smoothly. (Poped it out 4 times to make sure) used a 3/16 flat head craftsman screwdriver 5 1/2 long and a rubber Mallet. Not much effort required honestly way less then what's needed to pop them out normally with a pry bar ect.

I tried pushing one of my flat heads through but it wouldnt fit. Im not sure what size but it was long and skinny but might not have been skinny enough. Least its good to know you can get something through
 
I tried pushing one of my flat heads through but it wouldnt fit. Im not sure what size but it was long and skinny but might not have been skinny enough. Least its good to know you can get something through
Yea the first one I tried wouldant fit, still as long as he has a smaller screw driver or something it should go smooth its even worth buying the screwdriver if you didant have it compared to the hassle of drilling/taping the splines in that confined area. Though you do have to go through poping out the other axle but that should go smoothly. If you didant know its a lot easier if you remove the inner bolt on the lower control arms instead of messing with the ballpoints.
 
Well I did try it on my spare trans and it went smoothly. (Poped it out 4 times to make sure) used a 3/16 flat head craftsman screwdriver 5 1/2 long and a rubber Mallet. Not much effort required honestly way less then what's needed to pop them out normally with a pry bar ect.

My only question to you is, is that on an AWD auto trans? If not would that make a difference on being able to do that?
 
SO two options on the table... Which one you want to take a stab at first Nathan?

Taking out the drivers axle will be the cleanest route, cheaper as well.
Two long thin screw drivers might pull a premium.

As far as drilling, We both have a busted axle to test on, so I'm going to see if I can drill anything out of my junk axle.
I know the drilling will cause a lot of heat and place shavings everywhere, even in the trans, which makes me lean away from it.

Thanks Chris, 1990dsmkid and xiteamxi for all your help! I hope we can beat this problem without removing the transmission!
 
I agree Doug, pulling the other axle would be the smart route if it works. I think the drilling would be a last effort before pulling the trans out. But if you can try and drill into a spare just so we know if that route is even an option that would be great. Let me know what evening this week would work for you, I really wanna get this done soon since my jetta has no heat i've been freezing on my way to work!! LOL. Any evening works for me.
 
Honestly if you end up drilling then you are goong to need to drop tranny and pull it apart regard less to clean out the shaving or all this would be for nothing. Dont want shaving runnig through your tranny and destroying it. So hopefully you find a small and long enough screwdriver. If you end up pulling tranny it wouldnt take much. Just remove start, bell housing bolts, pull of slave cylinder, unplug reverse sensor, undo speedo cable, and remove mount. Then pull it off and drop it down. Other then that its just 5 bolts for t case and that pulls right off. Make sure you have proper sealant to put cases back together. I dont know how strong you are but if you pull tranny use the floor jack to help lower and then raise tranny. So much easier then man handling it.
 
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