reluctance to kick back and lacking down low power..

Posts specific to the 2.5 litre turbo engine

reluctance to kick back and lacking down low power..

Postby Stifull » Sat Sep 05, 2020 7:45 pm

So my Lib has been experiencing these issues for 2 days.. Had a squiz under the bonnet and discovered the oil cap had either fallen off or had forgot to put it on. Not a great deal of mess and the cap was sitting on the battery.. Could not having an oil cap effect gear change response and performance ????? it was sluggish and when you gave it some throttle it wouldn't kick back from say 5 to forth, instead it needed more throttle and then would go 5th to 3rd or even 2nd ... I have replaced the lid and disconnected the battery to reset the memory, if that may be an issue.. Anyway I guess I'll see when I go out later to pick my daughter up ... Any thoughts appreciated.. Cheers..
Current Subarus
07 Liberty GT (mine)
98 WRX Club Spes 2 with 2.5ltr upgrade(mine)
99 Ver 6 Sti also with 2.5ltr upgrade (son)
02 WRX Bugeye Hatch lots of goodies(wife)
09 Non Turbo Impreza(daughter#4)
Previous
98 GC8 WRX Hatch(daughter#1)
02 Bugeye WRX (daughter#2)
User avatar
Stifull
 
Posts: 175
Joined: Sun Nov 18, 2018 11:30 pm
Location: Brisbane
Car: '07 Liberty GT '98 WRX CS2 2.5ltr

Re: reluctance to kick back and lacking down low power..

Postby Yowie » Sat Sep 05, 2020 8:33 pm

It might run lean if unmetered air can come in through the oil cap (through the crank case then into the manifold through the PCV valve or pre-turbo pipe).

Running a bit lean could affect other performance aspects.
User avatar
Yowie
 
Posts: 148
Joined: Tue Jul 21, 2015 10:05 pm
Location: Brisbane
Car: SH Forester XT

Re: reluctance to kick back and lacking down low power..

Postby Stifull » Sat Sep 05, 2020 8:40 pm

Hhhmm ok. Yes that makes sense. I'll soon now as I am about to head into brisbane to pick up daughter.. Thanks for the reply..
Current Subarus
07 Liberty GT (mine)
98 WRX Club Spes 2 with 2.5ltr upgrade(mine)
99 Ver 6 Sti also with 2.5ltr upgrade (son)
02 WRX Bugeye Hatch lots of goodies(wife)
09 Non Turbo Impreza(daughter#4)
Previous
98 GC8 WRX Hatch(daughter#1)
02 Bugeye WRX (daughter#2)
User avatar
Stifull
 
Posts: 175
Joined: Sun Nov 18, 2018 11:30 pm
Location: Brisbane
Car: '07 Liberty GT '98 WRX CS2 2.5ltr

Re: reluctance to kick back and lacking down low power..

Postby Stifull » Sat Sep 05, 2020 10:26 pm

All good. It seems to be back to normal..so must have just been the extra air available via the oil intake ...
Current Subarus
07 Liberty GT (mine)
98 WRX Club Spes 2 with 2.5ltr upgrade(mine)
99 Ver 6 Sti also with 2.5ltr upgrade (son)
02 WRX Bugeye Hatch lots of goodies(wife)
09 Non Turbo Impreza(daughter#4)
Previous
98 GC8 WRX Hatch(daughter#1)
02 Bugeye WRX (daughter#2)
User avatar
Stifull
 
Posts: 175
Joined: Sun Nov 18, 2018 11:30 pm
Location: Brisbane
Car: '07 Liberty GT '98 WRX CS2 2.5ltr

Re: reluctance to kick back and lacking down low power..

Postby Yowie » Sat Sep 05, 2020 11:00 pm

Cool. It was a bit of a guess at my end, but the evidence seems to be backing the theory a bit.
User avatar
Yowie
 
Posts: 148
Joined: Tue Jul 21, 2015 10:05 pm
Location: Brisbane
Car: SH Forester XT

Re: reluctance to kick back and lacking down low power..

Postby bigBADbenny » Sun Sep 06, 2020 7:30 am

It will make it run rich to compensate for unmetered air, iirc.

Its not fatal but does show up on a learning view.
User avatar
bigBADbenny
 
Posts: 9251
Joined: Tue Oct 04, 2011 6:36 pm
Location: Collingwood, Melbourne
Car: MY07 GT-B 6MT OBP Wagon
Real name: Ben Richards
Profile URL: http://tinyurl.com/agvbzop


Return to 2.5T engine specific

Who is online

Users browsing this forum: No registered users and 3 guests