MY99 Suspect low power
05 September 2009, 09:05 PM
#1
Scooby Regular
Thread Starter
iTrader: (1)
Join Date: Jun 2003
Posts: 454
Likes: 0
Received 0 Likes
on
0 Posts
MY99 Suspect low power
MY99 with PPP and a frontpipe decat
Car idles smooth and just had a new Lambda fitted to clear a fault code but the car does'nt feel much quicker than my mates standard MY99, I suspect maybe standard dump valve is leaking i wonder can i dismantle it and clean it
Any help or idea's anybody please
Car idles smooth and just had a new Lambda fitted to clear a fault code but the car does'nt feel much quicker than my mates standard MY99, I suspect maybe standard dump valve is leaking i wonder can i dismantle it and clean it
Any help or idea's anybody please
05 September 2009, 09:59 PM
#2
Scooby Regular
iTrader: (3)
Join Date: Aug 2000
Location: 1600cc's of twin scroll fun :)
Posts: 25,565
Likes: 0
Received 2 Likes
on
2 Posts
Its probably detting its little heart out 
or your not running it on super unleaded, other things are that the boost solenoid can get clogged up which can cause lower power issues.
Tony
PS, about the det thing, seriously it will be detting its head off, PPP'd cars dont like to be decatted as the map is adjusted to run that kit, it will boost to 1.3bar and cause engine damage, suggest you put the front cat back on, its only about 10bhp difference with it off.
or your not running it on super unleaded, other things are that the boost solenoid can get clogged up which can cause lower power issues.Tony
PS, about the det thing, seriously it will be detting its head off, PPP'd cars dont like to be decatted as the map is adjusted to run that kit, it will boost to 1.3bar and cause engine damage, suggest you put the front cat back on, its only about 10bhp difference with it off.
05 September 2009, 10:06 PM
#3
Scooby Regular
Thread Starter
iTrader: (1)
Join Date: Jun 2003
Posts: 454
Likes: 0
Received 0 Likes
on
0 Posts
Its probably detting its little heart out or your not running it on super unleaded, other things are that the boost solenoid can get clogged up which can cause lower power issues.
Tony
PS, about the det thing, seriously it will be detting its head off, PPP'd cars dont like to be decatted as the map is adjusted to run that kit, it will boost to 1.3bar and cause engine damage, suggest you put the front cat back on, its only about 10bhp difference with it off.
or your not running it on super unleaded, other things are that the boost solenoid can get clogged up which can cause lower power issues.Tony
PS, about the det thing, seriously it will be detting its head off, PPP'd cars dont like to be decatted as the map is adjusted to run that kit, it will boost to 1.3bar and cause engine damage, suggest you put the front cat back on, its only about 10bhp difference with it off.
06 September 2009, 12:36 AM
#4
Scooby Regular
iTrader: (3)
Join Date: Aug 2000
Location: 1600cc's of twin scroll fun :)
Posts: 25,565
Likes: 0
Received 2 Likes
on
2 Posts
as my first scoob (MY00) had it fitted in 2001, if you remove the cat in the down pipe (and the centre cat is replaced by an STI resonator box btw ) then it will boost to 1.3 bar and det which isnt a good thing, so unless you have a KS3/4 or knocklink you wont no this (I had a knocklink and defi's fitted to mine).Your other issue could be down to the boost solenoid being blocked (also had this problem, feels good to start with then drops right off the power
) but 35bhp isnt much when it comes to out and out performance, you really need 100+ to see any noticable difference Tony
06 September 2009, 10:53 AM
#5
Scooby Regular
Thread Starter
iTrader: (1)
Join Date: Jun 2003
Posts: 454
Likes: 0
Received 0 Likes
on
0 Posts
You have no cats in your system right? I can tell you all the components of the PPP if you want? as my first scoob (MY00) had it fitted in 2001, if you remove the cat in the down pipe (and the centre cat is replaced by an STI resonator box btw ) then it will boost to 1.3 bar and det which isnt a good thing, so unless you have a KS3/4 or knocklink you wont no this (I had a knocklink and defi's fitted to mine).
Your other issue could be down to the boost solenoid being blocked (also had this problem, feels good to start with then drops right off the power) but 35bhp isnt much when it comes to out and out performance, you really need 100+ to see any noticable difference
Tony
as my first scoob (MY00) had it fitted in 2001, if you remove the cat in the down pipe (and the centre cat is replaced by an STI resonator box btw ) then it will boost to 1.3 bar and det which isnt a good thing, so unless you have a KS3/4 or knocklink you wont no this (I had a knocklink and defi's fitted to mine).Your other issue could be down to the boost solenoid being blocked (also had this problem, feels good to start with then drops right off the power
) but 35bhp isnt much when it comes to out and out performance, you really need 100+ to see any noticable difference Tony
Since fitting the downpipe i can really notice a loud whistle at low revs could this be an air leak from the dump valve
Just about every PPP impreza for sale on pistonheads has a full decat??
08 September 2009, 03:23 PM
#6
Scooby Regular
Thread Starter
iTrader: (1)
Join Date: Jun 2003
Posts: 454
Likes: 0
Received 0 Likes
on
0 Posts
Its probably detting its little heart out or your not running it on super unleaded, other things are that the boost solenoid can get clogged up which can cause lower power issues.
Tony
PS, about the det thing, seriously it will be detting its head off, PPP'd cars dont like to be decatted as the map is adjusted to run that kit, it will boost to 1.3bar and cause engine damage, suggest you put the front cat back on, its only about 10bhp difference with it off.
or your not running it on super unleaded, other things are that the boost solenoid can get clogged up which can cause lower power issues.Tony
PS, about the det thing, seriously it will be detting its head off, PPP'd cars dont like to be decatted as the map is adjusted to run that kit, it will boost to 1.3bar and cause engine damage, suggest you put the front cat back on, its only about 10bhp difference with it off.
08 September 2009, 03:40 PM
#7
Scooby Regular
iTrader: (3)
Join Date: Aug 2000
Location: 1600cc's of twin scroll fun :)
Posts: 25,565
Likes: 0
Received 2 Likes
on
2 Posts
Mine wasnt overboosting in the warmer weather but it was detting, it will overboost in the cooler weather so be warned that it could be detting and you dont know about it
Remap is your best option, ks3 sensor is a 200ish pound option thats worth investing in
Tony
Remap is your best option, ks3 sensor is a 200ish pound option thats worth investing in
Tony
Thread
Thread Starter
Forum
Replies
Last Post