What would cause boost to drop dramatically?
Posted: Fri Jul 09, 2010 7:09 am
Hey guys, I was just curious what would be the causes of my boost significantly dropping in the higher RPMs.
I have checked all of my vac/ IC lines and hoses and snugged them all up with zip-ties or tightening the clamps. It seems to be dropping for 8-9ish psi down to about 5 in first gear.
While on the topic, I know that the higher the gear, the more boost you will see at WOT. But at this point, I am only hitting the 9ish in first and as much as 17-18psi in fifth on the freeway. Like I said, I know it is normal to see higher boost in higher gears, but is it supposed to be that dramatic?
Could these be signs of my vf-11 going out? Could I possibly be missing a leak somewhere?
Could a "faulty" BCS cause these issues? I am running an MBC, so my BCS is only hooked up electrically, so that is why I ruled that out, even though I have had the BCS CEL come on.
I am swapping my TD04 on as soon as I get my gaskets in the mail, hopefully doing the swap next weekend, but I would like to figure out what is causing this wierd boost issues one way or another.
Thanks in advance
I have checked all of my vac/ IC lines and hoses and snugged them all up with zip-ties or tightening the clamps. It seems to be dropping for 8-9ish psi down to about 5 in first gear.
While on the topic, I know that the higher the gear, the more boost you will see at WOT. But at this point, I am only hitting the 9ish in first and as much as 17-18psi in fifth on the freeway. Like I said, I know it is normal to see higher boost in higher gears, but is it supposed to be that dramatic?
Could these be signs of my vf-11 going out? Could I possibly be missing a leak somewhere?
Could a "faulty" BCS cause these issues? I am running an MBC, so my BCS is only hooked up electrically, so that is why I ruled that out, even though I have had the BCS CEL come on.
I am swapping my TD04 on as soon as I get my gaskets in the mail, hopefully doing the swap next weekend, but I would like to figure out what is causing this wierd boost issues one way or another.
Thanks in advance