Results 1 to 7 of 7

Thread: Hesitant and slow acceleration!?!?!?

  
  1. #1
    Status
    Offline
    ZaffyGsi's Avatar
    AOC Regular
    Join Date
    Aug 2007
    Posts
    115
    Mentioned in
    0 Post(s)
    Quoted
    0 Post(s)

    Hesitant and slow acceleration!?!?!?

    Hi all, could do with a few experianced opinions thanks.
    My gsi seems to hesitate/bog down when trying to accelerate hard, it seems to hold boost o.k. showing about 0.7 bar in the first two gears and about 0.5 bar in gears three to five over boosting to about 0.8-0.9 bar.
    Was thinking it could be the AFM as every 1 seems to have these fail but what are your opinions as i don`t just wanna throw £90 at one if it could be something else, though it is really trial and error with this sort of thing.
    Will have a look at the plugs tomorrow and have got some injectors cleaner to try out. Only mods are panel filter, iridium plugs and miltek cat-back.

    Thanks
    Arden Blue Zafira GSi


  2. #2
    Status
    Offline
    Coupe John's Avatar
    AOC Obsessed
    Join Date
    Aug 2007
    Drives
    Astra 1.9 cdti xpack
    Location
    Leeds
    Posts
    2,593
    Mentioned in
    17 Post(s)
    Quoted
    61 Post(s)
    If your boost is holding fine and not bouncing all over the place then it isnt your boost selonoids, when you put your foot down does it feel like its pulling then drops off for a split second then comes back again and does this two or three times then its most likely to be the A.F.M, everytime mine felt like this a new one sorted it until it blows again , make sure you never over oil the panel filter and only oil it from the underside as this can freak the A.F.M aswell.

  3. #3
    Status
    Offline
    ZaffyGsi's Avatar
    AOC Regular
    Join Date
    Aug 2007
    Posts
    115
    Mentioned in
    0 Post(s)
    Quoted
    0 Post(s)
    Yeah, seems to start pulling then just drops right off then picks up again, car has done 43K and hasn`t had a new AFM, how long is there life expectancey?
    Thanks for the quick reply john
    Arden Blue Zafira GSi


  4. #4
    Status
    Offline
    Coupe John's Avatar
    AOC Obsessed
    Join Date
    Aug 2007
    Drives
    Astra 1.9 cdti xpack
    Location
    Leeds
    Posts
    2,593
    Mentioned in
    17 Post(s)
    Quoted
    61 Post(s)
    Life expectancey now thats a good question Its a total guess, it could blow in a coupe of days or last 12 months it depends, mine usually last about 6 months.

  5. #5
    Status
    Offline
    montyfox's Avatar
    AOC Obsessed
    Join Date
    Apr 2006
    Posts
    7,434
    Mentioned in
    1 Post(s)
    Quoted
    1 Post(s)
    AFM's can last for years or just a few days by all accounts.

    My bus would feel like it was holding back (at higher speeds) and then pick up again, similar to you experience. I changed the AFM at 30k miles. and all was good again.
    I paid about £65 for a genuine AFM.

  6. #6
    Status
    Offline
    jalfrezigazee's Avatar
    AOC Obsessed
    Join Date
    Aug 2006
    Posts
    3,102
    Mentioned in
    1 Post(s)
    Quoted
    0 Post(s)
    you have a boost issue so look at the solenoids. The boost is limited in 1st and 2nd to helo save the gearbox. Your car is showing higher boost in 1st and 2nd that the higher gears so that should be where the problem lies
    Be Happy


  7. #7
    Status
    Offline
    ZaffyGsi's Avatar
    AOC Regular
    Join Date
    Aug 2007
    Posts
    115
    Mentioned in
    0 Post(s)
    Quoted
    0 Post(s)
    Thanks for the replys, any way of diagnosing the solenoids, there is a front and back one isn`t there? What is there job and how much are new ones?
    Thanks
    Arden Blue Zafira GSi


Similar Threads

  1. hesitant acceleration sometimes
    By JimC64 in forum Astra Discussion & Chat
    Replies: 2
    Last Post: 14-12-2012, 02:05
  2. Hesitant Acceleration, HELP!!!!!
    By Glen0408 in forum Astra Discussion & Chat
    Replies: 3
    Last Post: 28-02-2012, 19:46

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •