Premature Boost?

[Diego]

Ok, driving along with my brother to buy a fuel pump to see if its the problem, but hear me out.

It doesn't happen all the time but, when driving around like on the interstate 55 in constructiongive it gas turbo will spool full but guage reads out 9psi but I know its at 11... and the turbo will sputter/cough back....

But other times it drives fine.. boost fully...

I will also check injectors if they are dirty or clogged too...

Anyone think of other things that can do this.

 

[Barnes]

If the gauge reads 9psi, how is it that you know it is actually 11psi?

 

[steve]

^ This. /ubbthreads/images/graemlins/confused.gif Why even have a gauge if you already ascertain the exact boost pressure through some type of divine knowing? /ubbthreads/images/graemlins/wink.gif

 

That happen to me bro and it was my spark plug wires that where ripped and when I changed them the turbo was running great

 

[Diego]

I switched boost guages went to prosport from an autometer....

But that's not the point.

The point is... car was fine, put a s16g on and left it run just a dp... ran fine, put the whole exhaust unit on and it chokes.... /ubbthreads/images/graemlins/uhh.gif


Not the wires... those I replaced when I got the car home. I leaning towards fuel cut... so I am changing the pump.

 

[Barnes]

Have you datalogged it?

 

Boost leak. Loose or split coupler? Are you venting to the air?

 

[sixsixtwo]

Hitting fuel cut has nothing to do with replacing your fuel pump. Fuel cut is a safety feature of the ECU designed to prevent you from running too lean. Also, boost leaks can cause you to hit fuel cut sooner than is normal.

 

[AnotherNewb]

Yep, we're going to need one of these

 

[steve]

Quoting sixsixtwo:
Hitting fuel cut has nothing to do with replacing your fuel pump. Fuel cut is a safety feature of the ECU designed to prevent you from running too lean. Also, boost leaks can cause you to hit fuel cut sooner than is normal.



This.

 

[Diego]

I haven't logged it... lost my palm dl in the nice winter that 1309 sat in, not sure where it went....

I will try to get a flick of it when it happens...


Oh and no I'm not VTA... I could get stabbed in the face /ubbthreads/images/graemlins/uhh.gif

 

" Kill him in the face, if he's venting to the air" /ubbthreads/images/graemlins/grin.gif
Diego,
Have you did a boost leak test? Start there.

 

Quoting Diego:
I switched boost guages went to prosport from an autometer....

But that's not the point.

The point is... car was fine, put a s16g on and left it run just a dp... ran fine, put the whole exhaust unit on and it chokes.... /ubbthreads/images/graemlins/uhh.gif


Not the wires... those I replaced when I got the car home. I leaning towards fuel cut... so I am changing the pump.



so you had just a downpipe on, and it ran fine (albiet probably loud as all holy hell), then you put the rest of the exhaust on, and now it chokes on boost? any chance theres something in there clogging it>? what exhaust is it?

 

[Diego]

Its stock exhaust, completely stock, just a zip tied mbc and a small 16.... that's it.

Yes it did run loud... the hoses are not split. Clamps on tight.

 

wow, never seen stock exhaust before lol... it's possible your cats clogged, or getting there anyway

 

[Diego]

I'm thinking my Sir names are getting longer.....???? Ahaha... debackle... and what is this sweet touche... haha


Anyways back on track... that is a possiblity.

Boost leak passes.
Hoses tight and in no warped condition.


If it is exhaust time to find some exhaust shop... that does mandrel and not bench bend....

And yes stock exhaust is nuts. I laughed as its been some time since me or my brother had stock exhaust.... haha /ubbthreads/images/graemlins/jawdrop.gif

 

[steve]

Quoting Diego:
"As flash" I meant something to suite (otherwise hide) the rails and add a touche of glam


click

Suite, touche, both used wrong... just like debacle (or debackle if you prefer).

 

[Diego]

Haha nice. Now I get it. /ubbthreads/images/graemlins/laugh.gif

 

/ubbthreads/images/graemlins/rofl.gif At least you earned yourself a title /ubbthreads/images/graemlins/dunno.gif

 

I wouldnt call that earned. More like failed into a title.