»  BC-BF Legacy Discussion »  Turbo
#mild hesitation after fcd install

Custom Search
Login | Register




Post new topic Reply to topic  [ 9 posts ] 
Author Message
 Post subject: mild hesitation after fcd install
PostPosted: Wed Dec 31, 2014 2:11 am 
Third Gear
Joined: Sun Jul 15, 2012 11:50 pm
Posts: 858
Location: sw colorado
well i made a fcd like morgie did. the did a new fuel filter and fuel injector clean. for the test drive it did well, but going up hill and hitting 12 psi it had hesitation. i 'm set at 14 psi. i also cleaned the maf. i read on line a weak coil could cause this issue. what else should i look for. i do have a spare coil just have to did it out


Profile  Offline
Reply with quote  
 Post subject: Re: mild hesitation after fcd install
PostPosted: Sat Jan 03, 2015 12:14 am 
Moderator
Moderator
Joined: Tue Aug 25, 2009 7:52 am
Posts: 4536
Location: Des Moines, Wa
I would replace the spark plugs with brand new NGK V-Power coppers, and gap them down a bit. Stock gap is .038-.042, I'd try high .020s-low .030s. I gapped mine down to .028 with a robtune (td05 at 18psi) and that fixed the hesitation that remained after running better grounds in the engine bay.

_________________
1992 Legacy SS 5mt, reasonably modified ;)


Profile  Offline
Reply with quote  
 Post subject: Re: mild hesitation after fcd install
PostPosted: Sat Jan 03, 2015 1:13 am 
Third Gear
Joined: Sun Jul 15, 2012 11:50 pm
Posts: 858
Location: sw colorado
thanks. soon as it warms up a tad i'll re gap them. i just changed the plugs in june or july


Profile  Offline
Reply with quote  
 Post subject: Re: mild hesitation after fcd install
PostPosted: Sun Jan 04, 2015 10:53 pm 
Site Admin
Site Admin
Joined: Tue Oct 15, 2002 11:37 am
Posts: 27111
Location: Houston, Tx
Did you have this hesitation before installing the FCD? If not, I'd remove the FCD and see if the hesitation is still there or not. That will help you narrow down whether the hesitation is caused by the FCD or not.

I'd recommend resetting the ECU if you decide to remove the FCD for testing purposes.

_________________
Josh

surrealmirage.com/subaru
1990 Legacy (AWD, 6MT, & EJ22T Swap)
1997 Impreza OBS

If you need to get a hold of me please email me rather then pm


Profile  Offline
Reply with quote  
 Post subject: Re: mild hesitation after fcd install
PostPosted: Mon Jan 05, 2015 12:58 am 
Third Gear
Joined: Sun Jul 15, 2012 11:50 pm
Posts: 858
Location: sw colorado
i re gapped the plugs to .028 ish also found the boot to the turbo inlet has a loose clamp. so i tightened it. pulls like a mofo now. even better than before the fcd. granted mine is a home made one for now. down side torque steer is massive lol


Profile  Offline
Reply with quote  
 Post subject: Re: mild hesitation after fcd install
PostPosted: Mon Jan 05, 2015 1:32 am 
Site Admin
Site Admin
Joined: Tue Oct 15, 2002 11:37 am
Posts: 27111
Location: Houston, Tx
You shouldn't have torque steer. Even as FWD I never had torque steer. If you have it, I suspect you may have worn motor/trans mounts or suspension bushings.

_________________
Josh

surrealmirage.com/subaru
1990 Legacy (AWD, 6MT, & EJ22T Swap)
1997 Impreza OBS

If you need to get a hold of me please email me rather then pm


Profile  Offline
Reply with quote  
 Post subject: Re: mild hesitation after fcd install
PostPosted: Mon Jan 05, 2015 4:00 am 
Third Gear
Joined: Sun Jul 15, 2012 11:50 pm
Posts: 858
Location: sw colorado
i know the trans mouts are nee but i dout the motor mounts were done. all i know when i get on it it pulls to the right a bite then feels like its loosing traction on the road.


Profile  Offline
Reply with quote  
 Post subject: Re: mild hesitation after fcd install
PostPosted: Mon Jan 05, 2015 6:32 pm 
Site Admin
Site Admin
Joined: Tue Oct 15, 2002 11:37 am
Posts: 27111
Location: Houston, Tx
I'd look at the motor mounts. Also, bushings in the suspension or an improper alignment could cause it.

_________________
Josh

surrealmirage.com/subaru
1990 Legacy (AWD, 6MT, & EJ22T Swap)
1997 Impreza OBS

If you need to get a hold of me please email me rather then pm


Profile  Offline
Reply with quote  
 Post subject: Re: mild hesitation after fcd install
PostPosted: Mon Jan 12, 2015 10:43 pm 
Fourth Gear
Joined: Sun Jun 10, 2007 4:35 am
Posts: 1734
Location: All over the place
Uneven tire wear can cause it too.

_________________
93 Touring Wagon (EJ20G 5spd Swap) -- In storage while I work (and never get to play) in JDM-land.
00 Forester S/tb (predecesor to the XT) -- My JDM fling, dont tell my Touring Wagon!


Profile  Offline
Reply with quote  

Display posts from previous:  Sort by  

Post new topic Reply to topic  [ 9 posts ] 


Who is online

Users browsing this forum: No registered users and 1 guest

Panel

Top You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
Search for:
Jump to:  

Powered by phpBB © 2000, 2002, 2005, 2007 phpBB Group
Dizayn Ercan Koc