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Jerking in 2008 Legacy B4 Help!
Rank: Member Joined: 6/22/2011 Posts: 561 Location: House
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2008 2.0 AWD AT. it's been making a sort of jerking when I let off the gas and then give it a little more, or when I'm trying to maintain a constant speed at very light throttle. When I'm trying to maintain a constant speed, usually at very light throttle, the car will lurch very noticeably, as if it were an automatic that was awkwardly shifting. It's a big problem on the highway. Other than this, the car is problem free- smooth running engine, perfectly shifting transmission, synchs work alright, and axles seem to be in good shape.
Engine RPMs don't change at all, so I really don't think the clutch is misadjusted or anything is slipping. It feels as if I'm coasting in neutral and then suddenly dropping the clutch, except that the clutch is clearly out the entire time.
Oriel told me to change ATF/Gear box fluid and we did, went back since the problem was still there after two weeks they told me we wash/clean throttle body, system. We did and the problem still there.
The service on schedule so is fuel filter and air cleaner
Before I head to Subaru Kenya, is there anyone who knows what the problem could be and/or a good mechanic for Subaru who can help.
Front bushes have been replaced, alignment and balancing done, shocks Monroe and King coils installed.
Could the problem be at one of the joints in the driveshaft? Or is it (as I have read in most forums) just a fact of life caused by finicky computer engine management that doesn't like that grey area between light throttle and engine braking mostly in AWD subarus?
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Rank: Member Joined: 8/27/2010 Posts: 495 Location: Nairobi
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Ok, the thread title was really misleading.  Sent from my Black Nokia 3310
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Rank: Member Joined: 6/22/2011 Posts: 561 Location: House
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Ash Ock wrote:Ok, the thread title was really misleading. Its all in the mind Ash cock (see that)  now you have an idea how to solve this before swenani comes with fish jerking.
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Rank: User Joined: 8/15/2013 Posts: 13,237 Location: Vacuum
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Ash Ock wrote:Ok, the thread title was really misleading. I almost invited Guka with vaseline and bar soap If Obiero did it, Who Am I?
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Rank: Member Joined: 12/2/2006 Posts: 658
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@ Ngoyoyo,
Have the mechanics checked the power distribution coil and high tension leads leading to the spark plugs?
Start there.....if any of those is faulty, then you get jerking as described by you.
Good luck
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Rank: Member Joined: 6/22/2011 Posts: 561 Location: House
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Julie wrote:@ Ngoyoyo,
Have the mechanics checked the power distribution coil and high tension leads leading to the spark plugs?
Start there.....if any of those is faulty, then you get jerking as described by you.
Good luck I am not ruling out anything at this point. I must definitely have the above checked. Thanks That's why @Guka loves you
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Rank: User Joined: 8/15/2013 Posts: 13,237 Location: Vacuum
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Julie wrote:@ Ngoyoyo,
Have the mechanics checked the power distribution coil and high tension leads leading to the spark plugs?
Start there.....if any of those is faulty, then you get jerking as described by you.
Good luck @Guka, why are you using Julie's device to post? If Obiero did it, Who Am I?
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Rank: Member Joined: 12/2/2006 Posts: 658
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Wewe Swenani...
Guka bought me a ride and it had a similar problem.
So a gals advice sio poa?
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Rank: User Joined: 8/15/2013 Posts: 13,237 Location: Vacuum
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Julie wrote:Wewe Swenani...
Guka bought me a ride and it had a similar problem.
So a gals advice sio poa? Ni poa but unexpected considering that Impunity and washiku do not know what a power distribution coil and high tension leads are!! If Obiero did it, Who Am I?
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Rank: Veteran Joined: 12/8/2009 Posts: 975 Location: Nairobi
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Ngogoyo wrote:2008 2.0 AWD AT. it's been making a sort of jerking when I let off the gas and then give it a little more, or when I'm trying to maintain a constant speed at very light throttle. When I'm trying to maintain a constant speed, usually at very light throttle, the car will lurch very noticeably, as if it were an automatic that was awkwardly shifting. It's a big problem on the highway. Other than this, the car is problem free- smooth running engine, perfectly shifting transmission, synchs work alright, and axles seem to be in good shape.
Engine RPMs don't change at all, so I really don't think the clutch is misadjusted or anything is slipping. It feels as if I'm coasting in neutral and then suddenly dropping the clutch, except that the clutch is clearly out the entire time.
Oriel told me to change ATF/Gear box fluid and we did, went back since the problem was still there after two weeks they told me we wash/clean throttle body, system. We did and the problem still there.
The service on schedule so is fuel filter and air cleaner
Before I head to Subaru Kenya, is there anyone who knows what the problem could be and/or a good mechanic for Subaru who can help.
Front bushes have been replaced, alignment and balancing done, shocks Monroe and King coils installed.
Could the problem be at one of the joints in the driveshaft? Or is it (as I have read in most forums) just a fact of life caused by finicky computer engine management that doesn't like that grey area between light throttle and engine braking mostly in AWD subarus?
I experienced Jerking on BH5 that I tried to solve for quiet a while including changing the gear box. The mech made me buy solenoids, change the ATF, clean some parts of the AT etc etc. The problem never disappeared. I gave up and got rid of the car. I am not saying should sell yours too You will know that you have arrived when money and time are not mutually exclusive "events" in you life!
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Rank: User Joined: 8/15/2013 Posts: 13,237 Location: Vacuum
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XSK wrote:Ngogoyo wrote:2008 2.0 AWD AT. it's been making a sort of jerking when I let off the gas and then give it a little more, or when I'm trying to maintain a constant speed at very light throttle. When I'm trying to maintain a constant speed, usually at very light throttle, the car will lurch very noticeably, as if it were an automatic that was awkwardly shifting. It's a big problem on the highway. Other than this, the car is problem free- smooth running engine, perfectly shifting transmission, synchs work alright, and axles seem to be in good shape.
Engine RPMs don't change at all, so I really don't think the clutch is misadjusted or anything is slipping. It feels as if I'm coasting in neutral and then suddenly dropping the clutch, except that the clutch is clearly out the entire time.
Oriel told me to change ATF/Gear box fluid and we did, went back since the problem was still there after two weeks they told me we wash/clean throttle body, system. We did and the problem still there.
The service on schedule so is fuel filter and air cleaner
Before I head to Subaru Kenya, is there anyone who knows what the problem could be and/or a good mechanic for Subaru who can help.
Front bushes have been replaced, alignment and balancing done, shocks Monroe and King coils installed.
Could the problem be at one of the joints in the driveshaft? Or is it (as I have read in most forums) just a fact of life caused by finicky computer engine management that doesn't like that grey area between light throttle and engine braking mostly in AWD subarus?
I experienced Jerking on BH5 that I tried to solve for quiet a while including changing the gear box. The mech made me buy solenoids, change the ATF, clean some parts of the AT etc etc. The problem never disappeared. I gave up and got rid of the car. I am not saying should sell yours too Mimi iko kama julie,naona shida ni lead wire aka tension leads If Obiero did it, Who Am I?
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Rank: Member Joined: 6/22/2011 Posts: 561 Location: House
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Swenani wrote:XSK wrote:I experienced Jerking on BH5 that I tried to solve for quiet a while including changing the gear box. The mech made me buy solenoids, change the ATF, clean some parts of the AT etc etc. The problem never disappeared. I gave up and got rid of the car. I am not saying should sell yours too Mimi iko kama julie,naona shida ni lead wire aka tension leads @XSK i could sell but i believe its solvable. I love the power in the B4 too much. Will go to garage on Monday and have the coil & tension leads checked. Will update you guys 
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Rank: Veteran Joined: 5/5/2011 Posts: 1,059
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Ngogoyo wrote:2008 2.0 AWD AT. it's been making a sort of jerking when I let off the gas and then give it a little more, or when I'm trying to maintain a constant speed at very light throttle. When I'm trying to maintain a constant speed, usually at very light throttle, the car will lurch very noticeably, as if it were an automatic that was awkwardly shifting. It's a big problem on the highway. Other than this, the car is problem free- smooth running engine, perfectly shifting transmission, synchs work alright, and axles seem to be in good shape.
Engine RPMs don't change at all, so I really don't think the clutch is misadjusted or anything is slipping. It feels as if I'm coasting in neutral and then suddenly dropping the clutch, except that the clutch is clearly out the entire time.
Oriel told me to change ATF/Gear box fluid and we did, went back since the problem was still there after two weeks they told me we wash/clean throttle body, system. We did and the problem still there.
The service on schedule so is fuel filter and air cleaner
Before I head to Subaru Kenya, is there anyone who knows what the problem could be and/or a good mechanic for Subaru who can help.
Front bushes have been replaced, alignment and balancing done, shocks Monroe and King coils installed.
Could the problem be at one of the joints in the driveshaft? Or is it (as I have read in most forums) just a fact of life caused by finicky computer engine management that doesn't like that grey area between light throttle and engine braking mostly in AWD subarus?
make sure the windows are tinted and rolled up before you begin, if it is the car that is jerking have your mechanic check the gearbox mountings loose ones cause the car to jerk when changing gears ie when you let off gas the car changes gears if the mounts are loose it causes a jerk, have them also check the engine mounts too. To Each His Own
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Rank: Member Joined: 12/5/2013 Posts: 224
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Ngogoyo wrote:2008 2.0 AWD AT. it's been making a sort of jerking when I let off the gas and then give it a little more, or when I'm trying to maintain a constant speed at very light throttle. When I'm trying to maintain a constant speed, usually at very light throttle, the car will lurch very noticeably, as if it were an automatic that was awkwardly shifting. It's a big problem on the highway. Other than this, the car is problem free- smooth running engine, perfectly shifting transmission, synchs work alright, and axles seem to be in good shape.
Engine RPMs don't change at all, so I really don't think the clutch is misadjusted or anything is slipping. It feels as if I'm coasting in neutral and then suddenly dropping the clutch, except that the clutch is clearly out the entire time.
Oriel told me to change ATF/Gear box fluid and we did, went back since the problem was still there after two weeks they told me we wash/clean throttle body, system. We did and the problem still there.
The service on schedule so is fuel filter and air cleaner
Before I head to Subaru Kenya, is there anyone who knows what the problem could be and/or a good mechanic for Subaru who can help.
Front bushes have been replaced, alignment and balancing done, shocks Monroe and King coils installed.
Could the problem be at one of the joints in the driveshaft? Or is it (as I have read in most forums) just a fact of life caused by finicky computer engine management that doesn't like that grey area between light throttle and engine braking mostly in AWD subarus?
Call Njonjo 072-286-0426. He is a Subaru Kenya Mech, can sort you out after work hours without ripping you off.
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Rank: User Joined: 8/15/2013 Posts: 13,237 Location: Vacuum
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matatuman wrote:Ngogoyo wrote:2008 2.0 AWD AT. it's been making a sort of jerking when I let off the gas and then give it a little more, or when I'm trying to maintain a constant speed at very light throttle. When I'm trying to maintain a constant speed, usually at very light throttle, the car will lurch very noticeably, as if it were an automatic that was awkwardly shifting. It's a big problem on the highway. Other than this, the car is problem free- smooth running engine, perfectly shifting transmission, synchs work alright, and axles seem to be in good shape.
Engine RPMs don't change at all, so I really don't think the clutch is misadjusted or anything is slipping. It feels as if I'm coasting in neutral and then suddenly dropping the clutch, except that the clutch is clearly out the entire time.
Oriel told me to change ATF/Gear box fluid and we did, went back since the problem was still there after two weeks they told me we wash/clean throttle body, system. We did and the problem still there.
The service on schedule so is fuel filter and air cleaner
Before I head to Subaru Kenya, is there anyone who knows what the problem could be and/or a good mechanic for Subaru who can help.
Front bushes have been replaced, alignment and balancing done, shocks Monroe and King coils installed.
Could the problem be at one of the joints in the driveshaft? Or is it (as I have read in most forums) just a fact of life caused by finicky computer engine management that doesn't like that grey area between light throttle and engine braking mostly in AWD subarus?
Call Njonjo 072-286-0426. He is a Subaru Kenya Mech, can sort you out after work hours without ripping you off. subaru kenya guys are closely monitoring this thread If Obiero did it, Who Am I?
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Rank: Member Joined: 9/13/2006 Posts: 123
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Boss I have gone through this same problem a few years back on a 2004 legacy b5. I took it to many mechanics who advised me oil change, put new sensors, change mountings etc. I loved the drive so I did everything and ended up spending close to 500k. But net result was the problem never went away. Finally someone told me it's a gearbox problem unique to some legacys so I should change whole gearbox. I decided to call it quits and I traded in the car for a forester. Lesson learnt don't be cheated by mechanics, subarus are good cars but very complex and are not easily understood by mechanics here. So don't waste time and money, just change the car.
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Rank: New-farer Joined: 6/27/2011 Posts: 63
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I have owned several Subaru Legacy B4s in the past and all had similar problems in varying degrees. For one car the problem resolved itself after an ATF flush. It is important to make sure you use manufacturer specified ATF even you have to buy it from the dealer. It is also important to make sure you change the AT filter as when this gets clogged up you will notice jerky transmission changes.
You may have to flash it severally- say monthly basis over 3 months to make sure you get any particles or gunk that may be causing you trouble.
I suspect this should help. If it doesnt you may want to start saving for a new transmission :(
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Rank: Veteran Joined: 5/5/2011 Posts: 1,059
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guru me wrote:I have owned several Subaru Legacy B4s in the past and all had similar problems in varying degrees. For one car the problem resolved itself after an ATF flush. It is important to make sure you use manufacturer specified ATF even you have to buy it from the dealer. It is also important to make sure you change the AT filter as when this gets clogged up you will notice jerky transmission changes.
You may have to flash it severally- say monthly basis over 3 months to make sure you get any particles or gunk that may be causing you trouble.
I suspect this should help. If it doesn't you may want to start saving for a new transmission :( I have noted guys killing their gear boxes by putting in ATF instead of CVT, check on the internet or the dealer before changing your gear box oil. To Each His Own
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Rank: Member Joined: 6/22/2011 Posts: 561 Location: House
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kayhara wrote:guru me wrote:I have owned several Subaru Legacy B4s in the past and all had similar problems in varying degrees. For one car the problem resolved itself after an ATF flush. It is important to make sure you use manufacturer specified ATF even you have to buy it from the dealer. It is also important to make sure you change the AT filter as when this gets clogged up you will notice jerky transmission changes.
You may have to flash it severally- say monthly basis over 3 months to make sure you get any particles or gunk that may be causing you trouble.
I suspect this should help. If it doesn't you may want to start saving for a new transmission :( I have noted guys killing their gear boxes by putting in ATF instead of CVT, check on the internet or the dealer before changing your gear box oil. Thanks @matatuman. I am willing to spend (but reasonable amounts)to make the problem disappear so will check Njonjo in course of the week @guru me & @kayhara as i had indicated above, the system was cleaned before putting ATF in Oct and then did the same last week and the problem gets worse. Oriel are in partnership with Subaru Kenya and i am sure they put the right specification for it. How much is the transmission? you make is sound very expensive The engine mounts had been checked but can have them re-checked by this njonjo guy @pops can i trade with your Forester? (is it the LL Bean?) For sure i will not spend more than 80k on this damn thing. I will tell my governor to give me her vits and she use footsobishi...tuekelee legacy mawe
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Rank: Veteran Joined: 4/1/2009 Posts: 1,883
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Ngogoyo wrote:kayhara wrote:guru me wrote:I have owned several Subaru Legacy B4s in the past and all had similar problems in varying degrees. For one car the problem resolved itself after an ATF flush. It is important to make sure you use manufacturer specified ATF even you have to buy it from the dealer. It is also important to make sure you change the AT filter as when this gets clogged up you will notice jerky transmission changes.
You may have to flash it severally- say monthly basis over 3 months to make sure you get any particles or gunk that may be causing you trouble.
I suspect this should help. If it doesn't you may want to start saving for a new transmission :( I have noted guys killing their gear boxes by putting in ATF instead of CVT, check on the internet or the dealer before changing your gear box oil. Thanks @matatuman. I am willing to spend (but reasonable amounts)to make the problem disappear so will check Njonjo in course of the week @guru me & @kayhara as i had indicated above, the system was cleaned before putting ATF in Oct and then did the same last week and the problem gets worse. Oriel are in partnership with Subaru Kenya and i am sure they put the right specification for it. How much is the transmission? you make is sound very expensive The engine mounts had been checked but can have them re-checked by this njonjo guy @pops can i trade with your Forester? (is it the LL Bean?) For sure i will not spend more than 80k on this damn thing. I will tell my governor to give me her vits and she use footsobishi...tuekelee legacy mawe won't she beat you for even thinking of that?
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