Notices
Engine Management and ECU Remapping This section is to discuss the various aspects of engine management modification for your Subaru.

hesitant acceleration under light throttle

Thread Tools
 
Search this Thread
 
Old 30 October 2015, 06:28 PM
  #1  
carpeys
Scooby Regular
Thread Starter
 
carpeys's Avatar
 
Join Date: Nov 2009
Location: treherbert,south wales
Posts: 44
Likes: 0
Received 0 Likes on 0 Posts
Default hesitant acceleration under light throttle

hi all does anyone have a clue what's happening to my v3 impreza import I have read the threads of the boost solenoid and done the cleaning bit on connecting the green connectors under the steering column I have a ticking sound coming out under light throttle up to about 1500 revs when I have that I get a hesitant acceleration and low boost ,when I get no ticking sound the boost works fine and it seems to be getting worst not better , had a look for split boost pipes but seem at a loss because when its all working fine its like a rocket can anyone point me in the right direction what to look for or is it a case that the boost solenoid is faulty by not staying closed when on boost any help would be appreciated thanks
Old 02 November 2015, 09:25 AM
  #2  
bludgod
Scooby Regular
iTrader: (3)
 
bludgod's Avatar
 
Join Date: Feb 2007
Location: Belfast
Posts: 1,849
Received 18 Likes on 16 Posts
Default

the ticking sound is usually the boost solenoid being screwed into the bodywork without the little rubber grommets. Your hearing the valve opening/closing at speed.

If it's giving you wonky boost easiest thing to do is replace it - they don't cost mad money.
Old 03 November 2015, 01:04 PM
  #3  
carpeys
Scooby Regular
Thread Starter
 
carpeys's Avatar
 
Join Date: Nov 2009
Location: treherbert,south wales
Posts: 44
Likes: 0
Received 0 Likes on 0 Posts
Default

thanks for the reply but the problem is at very low speed not even enough to start getting any boost and has got so bad that even pulling off was sometimes hit and miss but then after some popping sound it suddenly clears then no problem like a rocket listened for the ticking but was not there its a strange one
Old 18 March 2016, 07:45 PM
  #4  
carpeys
Scooby Regular
Thread Starter
 
carpeys's Avatar
 
Join Date: Nov 2009
Location: treherbert,south wales
Posts: 44
Likes: 0
Received 0 Likes on 0 Posts
Default fuel pressure reg

hi all fitted a new walbro fuel pump top try to eliminate my hesitation fault as it seems like fuel starvation but now seems after fitting new pump car is hard to start and when started sounds like running rich until it clears , never had starting problem before new pump would there possibly be a fuel pressure regulator problem now with the extra fuel pressure from new pump,thanks
Old 18 March 2016, 10:02 PM
  #5  
sbn1979
Scooby Regular
 
sbn1979's Avatar
 
Join Date: Nov 2010
Location: Wednesbury
Posts: 54
Likes: 0
Received 0 Likes on 0 Posts
Default

Originally Posted by carpeys
hi all fitted a new walbro fuel pump top try to eliminate my hesitation fault as it seems like fuel starvation but now seems after fitting new pump car is hard to start and when started sounds like running rich until it clears , never had starting problem before new pump would there possibly be a fuel pressure regulator problem now with the extra fuel pressure from new pump,thanks
Any cel lights?
Old 20 March 2016, 12:59 PM
  #6  
carpeys
Scooby Regular
Thread Starter
 
carpeys's Avatar
 
Join Date: Nov 2009
Location: treherbert,south wales
Posts: 44
Likes: 0
Received 0 Likes on 0 Posts
Default

No cel lights very unusual
Old 23 March 2016, 07:45 AM
  #7  
semih
Scooby Regular
 
semih's Avatar
 
Join Date: Mar 2016
Location: Turkey
Posts: 177
Received 14 Likes on 11 Posts
Default

did you check maf and ignition cables? did you read plugs?
Old 01 April 2016, 06:34 PM
  #8  
BlackBetty78
Scooby Regular
 
BlackBetty78's Avatar
 
Join Date: Oct 2015
Location: Shelf, Halifax
Posts: 94
Likes: 0
Received 0 Likes on 0 Posts
Default

I had some recent hesitation issues on my 06 Hawkeye thought possibly lamdba sensor but turned out 2 of my spark plugs were shot.

The power was stuttering for me.....

Might be worth a looksie?
Old 01 April 2016, 08:15 PM
  #9  
ComputerSystems
Scooby Regular
 
ComputerSystems's Avatar
 
Join Date: Nov 2015
Location: Leicester
Posts: 78
Likes: 0
Received 0 Likes on 0 Posts
Default

The "ticking sound" you are describing could possibly be pre-ignition and the result of a fuelling issue / Sensor issue affecting fuelling?
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
Essexdon
Member's Gallery
24
02 May 2017 09:36 PM
jaygsi
General Technical
16
14 November 2015 01:22 AM
Robtequila
General Technical
7
27 October 2015 03:20 PM
daveriley123
ScoobyNet General
1
26 October 2015 02:27 PM



Quick Reply: hesitant acceleration under light throttle



All times are GMT +1. The time now is 09:32 AM.