Last post on Oct 04, 2013 at 5:19 PM
You are in the Subaru Legacy & Outback
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Subaru Legacy, Electrical, Engine, Transmission
#7 of 11 Re: Hard shifting issue & loss of acceleration 1999 Subaru Legacy [emkz4430]
Apr 15, 2013 (6:14 am)
emkz4430 that is great news! I hope your hard shifting troubles are over! Can you say more about the diagnostic they ran at Advance Auto? Was your check engine light on when they ran the diagnostic and what was the code that they pulled from diagnostic? I have never had any diagnostic run hat points to the knock sensor being the problem so I am curious if this is worth looking into for my car's hard shifting issue. Any more details you can provide would be great! Thanks!
#8 of 11 Re: Hard shifting issue & loss of acceleration 1999 Subaru Legacy [filmplane]
Apr 15, 2013 (9:01 am)
My check engine light I think is burnt out because it does light for a few seconds when I turn the car on, but with this knock sensor issue I've heard that sometimes the light won't even come on. Anyway I don't know what the code number was but I do remember it said "knock sensor" and to replace it. I've read that this is a common problem with these Subarus and will cause those exact acceleration issues. It is definitely worth checking on your car! Like I said its right underneath the throttle body, connected by one bolt. Simply unscrew the 12mm bolt and unplug the other end. If you google a picture of it it is a plastic ring with an electrical tail. It takes 5 min to do and once you have removed the piece look for any kind of crack on the plastic ring and clean if its dirty. Mine had a tiny crack and was full of grime. The crack alone will mess the whole car up but I don't know about the grime. Since I replaced it yesterday it has had no problems, driving it to school this morning it had no problem. Let me know if you have any questions!
#9 of 11 Re: Hard shifting issue & loss of acceleration 1999 Subaru Legacy [emkz4430]
May 02, 2013 (12:54 pm)
Ok so I promised an update after taking to mechanic. here's what they found:
1. One of my cooling fans was failing, bad wire so it wasn't even running.
2. Positive battery terminal wire completely shot so bad connection there which was replaced.
3. Mechanic adjusted Throttle Position Sensor above the recommended spec voltage (says from experience he does this because the car responds better to that setting).
Thought our problems were solved but then Hard shifting and same old symptoms didn't happen again until after almost 300 miles of driving.
Took back to mechanic and decided to have knock sensor replaced. Knock sensor replaced and so far NO HARD SHIFTING ISSUES and any of the symptoms as described previously in this post.
BUT ALAS a new symptom has manifested itself. Maybe folks have some idea about this new issue?
Now when putting gas on the accelerator, there is an uneven shift from 1st to 2nd gear and car seems to be struggling to get acceleration between gears. Very sluggish and even. This is most noticeable going from second to third. It feels like it isn't getting gas, accelerating very slowly up to around 25000 RPMs where it for lack of a better word BURSTS into third gear. The RPMs move very gradually and then ZIP up to 30000 RPMs. This issue is more frustrating than the hard shift issue as it happens ALL the time now during in- town driving.
Very frustrated but at least now a mechanic can feel and experience this new problem unlike the previous issue where no mechanic could replicate.
Any thoughts? Thanks in advance!
Oct 04, 2013 (2:15 pm)
Hello emkz4430 I am having the EXACT same problems that you had with my 1999 Subaru I am just curious how the car has been running and if the knock sensor fixed it?
Oct 04, 2013 (5:19 pm)
Sorry the msg above was intended for filmplane