I bought a 97 tsi awd and there are some parts lying around in the engine bay and I dont know what they go to. Im knew to the 4G63 so I need some help.

1st piece is this wire coming out from under the fuse box with a pigtail to plug into something but I dont see what it plugs into or what it is for. It was just there dangling.



2nd piece is a wire with a hook and two nipples on it where it looks like hoses should hook up to. I dont know where it connects or what its for either.


3rd piece heres a pic of my intake and it only has to nipples on it and one is capped the other goes to the valve cover and I dont see anywhere to recirculate the bov too. Do I need a new intake to recirculate? And what hose gose to the nipple that is capped?


Heres a pic of the entire engine bay if anyone sees anything else wrong let me know please:talon:

well i can answer at least part of it. you have no bov recirc on that intake. it's set up for an atmosphere vent bov. not a good thing on dsm's from what i've come to understand.

Originally posted by blue97tsiawd
1st piece is this wire coming out from under the fuse box with a pigtail to plug into something but I dont see what it plugs into or what it is for. It was just there dangling.

Cruise Control, which looks like your car doesn't have.

Originally posted by blue97tsiawd
2nd piece is a wire with a hook and two nipples on it where it looks like hoses should hook up to. I dont know where it connects or what its for either.

Factory boost controller selenoid.

Originally posted by blue97tsiawd
3rd piece heres a pic of my intake and it only has to nipples on it and one is capped the other goes to the valve cover and I dont see anywhere to recirculate the bov too. Do I need a new intake to recirculate? And what hose gose to the nipple that is capped?

You need a new intake if you want to recirculate(recommended). The capped hole is for the evap canister(may have been removed).

Originally posted by 420a-Tnthewerks

Originally posted by blue97tsiawd 1st piece is this wire coming out from under the fuse box with a pigtail to plug into something but I dont see what it plugs into or what it is for. It was just there dangling.

Cruise Control, which looks like your car doesn't have.

Originally posted by blue97tsiawd 2nd piece is a wire with a hook and two nipples on it where it looks like hoses should hook up to. I dont know where it connects or what its for either.

Factory boost controller selenoid.

Originally posted by blue97tsiawd 3rd piece heres a pic of my intake and it only has to nipples on it and one is capped the other goes to the valve cover and I dont see anywhere to recirculate the bov too. Do I need a new intake to recirculate? And what hose gose to the nipple that is capped?

You need a new intake if you want to recirculate(recommended). The capped hole is for the evap canister(may have been removed).

Any idea on what the other two pieces are? The plug and the other piece with the two nipples on it

read more carefully under the pictures he quoted. he answered the questions. the plug is for cruise control, the black thing with two nipples is factory boost control solenoid, nipple that's plugged goes to the evap.

and if you'd like to recirc, i have a stock intake pipe i'll sell you on the cheap.

Thanks 420a-Tnthewerks you are wise when it comes to the 4G63.

No prob.

Originally posted by blue97tsiawdAny idea on what the other two pieces are? The plug and the other piece with the two nipples on it

To be more speciific, if you have a manual boost controller, then you should not use even use this! Should be obvious, but you never know. If you do not have DSMLink, then you will have to leave it in though (plugged in to the harness, but no hoses connected) because it will throw a CEL. This car looks like most of the unnecessary stuff (emmissions) have been removed, all though you still have AC.

Oh, and as fas as why it is bad to vent to the atmosphere, look at wherre the mas airflow sensor is: right off of your air filter. This sensor is what tells the car how much air is coming in, so proper fuel ratios can be 'made'. Now, by venting to the atmosphere you are dumping off air that the MAS already accounted for and believes is still in the intake. Because of this, the computer will send too much fuel and most likely the car will stutter a little after shifts. A low idle can also be a symptom. However, not everyone that vents using the stock MAS have symptoms, as it's kind of a hit or miss thing. Finally, the correct way to vent to the atmosphere is using a MAS located after the bov, such as a GM MAS. However I don't recommend this, as it can be a big pain to calibrate.

the way i'm getting around the recirc problem while still venting to atmosphere is i bought a turbosmart dual port bov. it'll recirc and atmosphere vent at the same time. best of both worlds.

Originally posted by 97eclipse97

Originally posted by blue97tsiawdAny idea on what the other two pieces are? The plug and the other piece with the two nipples on it

To be more speciific, if you have a manual boost controller, then you should not use even use this! Should be obvious, but you never know. If you do not have DSMLink, then you will have to leave it in though (plugged in to the harness, but no hoses connected) because it will throw a CEL. This car looks like most of the unnecessary stuff (emmissions) have been removed, all though you still have AC. Oh, and as fas as why it is bad to vent to the atmosphere, look at wherre the mas airflow sensor is: right off of your air filter. This sensor is what tells the car how much air is coming in, so proper fuel ratios can be 'made'. Now, by venting to the atmosphere you are dumping off air that the MAS already accounted for and believes is still in the intake. Because of this, the computer will send too much fuel and most likely the car will stutter a little after shifts. A low idle can also be a symptom. However, not everyone that vents using the stock MAS have symptoms, as it's kind of a hit or miss thing. Finally, the correct way to vent to the atmosphere is using a MAS located after the bov, such as a GM MAS. However I don't recommend this, as it can be a big pain to calibrate.

Yes there is a mbc on it and what do you mean besides that, that most of the unnecessary stuff(emmissions) is not on the car. I dont have any cel tripped. Besides cruise control what else am I missing that would make me fail?

Originally posted by blue97tsiawd
Yes there is a mbc on it and what do you mean besides that, that most of the unnecessary stuff(emmissions) is not on the car. I dont have any cel tripped. Besides cruise control what else am I missing that would make me fail?

Because you are AWD, they can't put your car on the rollers, so all they do is a two stage idle test. All you really need to pass this is a catalytic converter, afaik. EGR, charcoal canister, other solenoids (Boost, FPR), A/C, and cruise control can all be ripped out, but still allow you to pass emmissions.

Also, if any air is being vented to the atmosphere post MAS, then no, it is not the best of both worlds, because the same situation still applies. However like I said, you may or may not notice the usual symptoms.

I havent noticed it stuttering when I shift and it idles fine. If I dont have the signs of that can I keep the intake the way it is or should I still recirculate?

Originally posted by blue97tsiawd
I havent noticed it stuttering when I shift and it idles fine. If I dont have the signs of that can I keep the intake the way it is or should I still recirculate?

You should recirculate because that's the way the system is designed. Even w/out noticible symptoms, you still are getting a rich spot when you shift.
Your call...

You can (and IMO should to simplify the mess) also vent with a speed-density system like the AEM EMS or Megasquirt.

But if you just got into these cars you need to recirculate it.