BOV blocked off?

[93 Eagle Talon TSi]

i know some of you are getting anoyed with my threads but im trying to get my post up past 30 and get my 30 days in so i can be a proven member, but i fix my reving up situation, kind of. the guy i bought the car from block off the bypass tube that goes to the maf plastic tube thats goes to the cold side of the turbo like in the picture, and some guy told me on here that this will kill my turbo and my intake, so im wondering how to fix this, because if i hook up a hose there the car will not rev up so do i need to buy a new maf? And again sorry for all the questions and my threads just trying to learn everthing i can from you guys.

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[cl1ckclack]

unless the car has been tuned properly... it is supposed to be connected to the port off of your BOV

 

[cl1ckclack]

if your car will not run properly with it connected you have an issue else where. do you have a MAF-T or anything?

 

[crash89]

Whoever told you that not having your BOV recirculated will "kill" your turbo is an idiot.. All it does is make you run pretty rich between shifts since the air that is being released into the atmosphere was already metered and now is not being used.. When the throttle is closed, the ECU sends more fuel to accommodate the release air. Also will make you most likely stall when letting off the throttle when coming to a stop..

And what do you mean the car will not rev up? Reinstalling this hose should have nothing to do with revs.

EDIT: Spelling error..

 

[93 Eagle Talon TSi]

if your car will not run properly with it connected you have an issue else where. do you have a MAF-T or anything?

not sure whats the differnt from a maf and a maf-t?

 

[cl1ckclack]

Whoever told you that not having your BOV recirculated will "kill" your turbo is an idiot.. All it does is make you run pretty rich between shits since the air that is being released into the atmosphere was already metered and now is not being used.. When the throttle is closed, the ECU sends more fuel to accommodate the release air. Also will make you most likely stall when letting off the throttle when coming to a stop..

And what do you mean the car will not rev up? Reinstalling this hose should have nothing to do with revs.

i had this same issue... kind of. when i was messing around, trying to get my talon running before pulling the motor, i had the vent my BOV, as my UICP and recirc pipe wouldnt work with the intake... i forgot the cap the recirc pipe on my intake, and the car would barely run, and whenever i touched the gas, it would stall out.

 

[cl1ckclack]

not sure whats the differnt from a maf and a maf-t?

the MAF-T is a translator and tuning tool that allows you to vent your BOV without running rich inbetween shifts

 

[Gasolinebaptism]

Looking at the picture I'd guess he has a stock MAF.
There needs to be a tube that runs between the outlet of the BOV to the port on the intake, and it looks like you havn't tried doing that if you've just bought the car, so hook it up, and the car will no longer stumble and go rich when you let off the gas or when it's idling.
If you would like an explanation as to why this modification makes the car run poorly, then let me know.

 

[crash89]

i had this same issue... kind of. when i was messing around, trying to get my talon running before pulling the motor, i had the vent my BOV, as my UICP and recirc pipe wouldnt work with the intake... i forgot the cap the recirc pipe on my intake, and the car would barely run, and whenever i touched the gas, it would stall out.

Because it was a huge vacuum leak.. Lots of unmetered air being sucked into the system..

 

[93 Eagle Talon TSi]

And what do you mean the car will not rev up? Reinstalling this hose should have nothing to do with revs.

thats why im comfused i hooked up a hose frim the bov the the maf tube and it will not rev up it just starts to die, and when i block them off the car revs up and the turbo spools and bov works.

 

[Gasolinebaptism]

not sure whats the differnt from a maf and a maf-t?

Typical MAF will be found pre turbo, it meters air at atmospheric pressure, the GM MAF-T will be found in your upper intercooler pipe above the blow off valve, it measures pressurized air.
You will have one of the two.
The MAF-T is an aftermarket piece that allows you to vent your BOV to atmosphere instead of recirculating through your intake.

 

[93 Eagle Talon TSi]

Typical MAF will be found pre turbo, it meters air at atmospheric pressure, the GM MAF-T will be found in your upper intercooler pipe above the blow off valve, it measures pressurized air.
You will have one of the two.
The MAF-T is an aftermarket piece that allows you to vent your BOV to atmosphere instead of recirculating through your intake.

ok then i have just the maf not the maf-t.

and heres the picture of it with the hose hooked up and does not rev up when hooked up, but when capped off it works fine

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[cl1ckclack]

Because it was a huge vacuum leak.. Lots of unmetered air being sucked into the system..

i knew what and why it was happening... i was just saying that i had experienced what he was talking about. as soon as i shut off the car and popped the hood, i knew exactly what i had forgotten.

 

[93 Eagle Talon TSi]

There needs to be a tube that runs between the outlet of the BOV to the port on the intake, and it looks like you havn't tried doing that if you've just bought the car, so hook it up, poorly, then let me know.

i do have it hooked up. in the picture at the bottom that i just posted shows its going the the intake, its the skinny hoses that goes over the valve cover and the throttle cable

 

[Gasolinebaptism]

Take a picture of the hose running between the BOV and the intake, I don't see it in that picture.
Also, there should be a small vacuum line running from the bottom of the intake manifold to the top port on the BOV.

 

[cl1ckclack]

smh, not the vacuum port on the top of the BOV, the big port, that is the same size as the capped one on the intake.

 

[cl1ckclack]

Take a picture of the hose running between the BOV and the intake, I don't see it in that picture.
Also, there should be a small vacuum line running from the bottom of the intake manifold to the top port on the BOV.

hes talking about the vacuum line.

 

[Gasolinebaptism]

We're looking for like a 1.5" tube, not a 1/4" piece.

 

[H@xtGSX]

Whoever told you that not having your BOV recirculated will "kill" your turbo is an idiot.. All it does is make you run pretty rich between shits...

Ow...... It hurts.... The laughing .... Ow....


Unless you have an ECU capable of speed density control, or a MAF-T unit, that tube NEEDS to be hooked up to your intake. The blow off valve (BOV) NEEDS to have a little vacuum line connecting it to the intake manifold, behind the throttle plate, on the nipple next to the MDP sensor. You do need a BOV, or everytime you take your foot off the gas pedal, there will be a shockwave of air pounding the hell out of your turbo, trying to force it to spin the wrong direction. It will damage it eventually, unless you're running something with HUGE surge ports. Even then, it will eventually cause enough wear to damage it.

 

[cl1ckclack]

unless you have an aftermarket BOV... without a recirculation port? since the previous owner didnt think it was necessary...

 

[93 Eagle Talon TSi]

which color,

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[crash89]

Ow...... It hurts.... The laughing .... Ow....

LMFAO.. God damnit.. I didnt notice that..

 

[cl1ckclack]

the red one i believe...

 

[Gasolinebaptism]

So take a picture of the BOV.
There's a large port on the BOV that a hose should run from to the intake.
Again, as Clickclack said, it may be an aftermarket BOV that will require a recirculation kit.

definitely red.

 

[cl1ckclack]

So take a picture of the BOV.
There's a large port on the BOV that a hose should run from to the intake.
Again, as Clickclack said, it may be an aftermarket BOV that will require a recirculation kit.

ive never had to mess with my BOV... so correct me if im wrong. but if he has a BOV without a recirc port, wont he need a new BOV all together?