Unstable Boost; Video Inside
Apr 14, 2010, 12:11 AM
#18
I actually think you may be fine, and just trying to load up the car too early. Does it do the same for u in 3rd, say 2000rpm? (but not as harsh of a surge) If not, I think youre fine...
I would definitely do a BL test, just in case. (if for nothing else, for peace of mind) Check the BOV. and you need to use soap and water, as just listening might not cut it... I paid a shop to do a BL test, and he pressurized it, listened for leaks for like a 10 secs, and called it good. I think it takes a lil more effort to find these lil fkrs, as larger leaks dont even make a whistle...
I would definitely do a BL test, just in case. (if for nothing else, for peace of mind) Check the BOV. and you need to use soap and water, as just listening might not cut it... I paid a shop to do a BL test, and he pressurized it, listened for leaks for like a 10 secs, and called it good. I think it takes a lil more effort to find these lil fkrs, as larger leaks dont even make a whistle...
Apr 14, 2010, 12:19 AM
#19
Evolving Member
Thread Starter
iTrader: (10)
Join Date: Feb 2010
Location: USA
Posts: 147
Likes: 0
Received 0 Likes
on
0 Posts
I actually think you may be fine, and just trying to load up the car too early. Does it do the same for u in 3rd, say 2000rpm? (but not as harsh of a surge) If not, I think youre fine...
I would definitely do a BL test, just in case. (if for nothing else, for peace of mind) Check the BOV. and you need to use soap and water, as just listening might not cut it... I paid a shop to do a BL test, and he pressurized it, listened for leaks for like a 10 secs, and called it good. I think it takes a lil more effort to find these lil fkrs, as larger leaks dont even make a whistle...
I would definitely do a BL test, just in case. (if for nothing else, for peace of mind) Check the BOV. and you need to use soap and water, as just listening might not cut it... I paid a shop to do a BL test, and he pressurized it, listened for leaks for like a 10 secs, and called it good. I think it takes a lil more effort to find these lil fkrs, as larger leaks dont even make a whistle...
I think what i'll do is just want till I upgrade the intercooler (probably in a month or so) and then just loosen and recheck all of the clamps.
Apr 14, 2010, 01:12 AM
#20
Here's a red with some surge happening you can here it pretty good when he accelerates out of a corner.
http://www.youtube.com/watch?v=mDfAZ...eature=related
Apr 14, 2010, 02:08 AM
#22
a boost leak test is very important. Make sure all the hoses behind the intake manifold and below are in place. Try a 3rd gear pull starting at 3000 rpms and then a 5th gear pull from 3000 rpms. Make note of how much peak boost you are making in each pull. Should give you enough idea to figure out whats going on.
Apr 14, 2010, 11:19 AM
#24
Evolving Member
Lemme elaborate a little, in the higher gears, you engine is not under as much load. When your clutch slips at high RPM in these gears the wastegate opens momentarily and then when your clutch grabs and is under load once more, the boost goes back up and you feel like you've gotten a kick in the pants. This my friend is the first sign that you will soon need a new clutch.
Apr 14, 2010, 11:30 AM
#25
Evolving Member
Thread Starter
iTrader: (10)
Join Date: Feb 2010
Location: USA
Posts: 147
Likes: 0
Received 0 Likes
on
0 Posts
haha I dont think so. The car has 8k miles on it, never launched or anything.
Gosh, never knew their could be so many possibilities to what is happening.
Gosh, never knew their could be so many possibilities to what is happening.
Apr 14, 2010, 10:41 PM
#29
Evolving Member
Thread Starter
iTrader: (10)
Join Date: Feb 2010
Location: USA
Posts: 147
Likes: 0
Received 0 Likes
on
0 Posts
yes the car has a tbe with no cat. Im going to put that plug on the sensor soon to get rid of that pesky light. A retune is definitely in need but I am waiting till I get the rest of the bolt ons (02 dump, front mount intercooler, ported: throttle body, exhaust mainfold, intake manifold; and cams, springs, valves and retainers) to complete the tune.
Apr 15, 2010, 07:06 AM
#30
Evolving Member