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Comments
-juice
Steve
Steve
I have, yes, and used the rear diffy protector on my Forester. I used a piece of treated wood in between to prevent any damage.
I've also jacked up my Miata on the differential housing, no problem.
Use jack stands for both.
-juice
Ken
-juice
-Colin
Cheers Pat.
-mike
displayed which is for the mass air flow sensor. Has anyone had a similiar problem? Help-- Worn out.??? Why would car start stalling after starting problem was fixed? Just coincidence??
Steve
At this point, I think it's gonna be up to a shop to troubleshoot, honestly.
-juice
If you don't find anything, spend $3-5 at an autoparts store and get a can of starting fluid-- I think Prestone should be carried by most stores. With the engine idling, open the hood and spray the starting fluid on the intake plumbing and then steadily work around to all vacuum hoses (small bits of rubber tubing) if necessary. If hit a vacuum leak with the starting fluid directly the engine will race/rev up a bit. Secure or replace any leaks you find.
If you do this and don't find anything, then I'd think about taking it to another servicer and I wouldn't recommend just buying a new MAF sensor to see if that works... they're kinda pricey. If you know of anyone with the same year of car (or close) and same engine, perhaps you could borrow their MAF sensor for a quick test.
Good luck!
-Colin
pro IT guy, amateur mechanic
http://www.fsautoparts.com/
-juice
- Normal procedure: E-brake up, in neutral, clutch in, turn key, wait for pump to prime, start engine, clutch out
- Revs rise to 1500RPM
- Seconds later, revs begin to drop to around 1000RPM, engine labors as if clutch is engaging (I'm in neutral!)
- Car jerks forward and stalls, thanks to the e-brake!
This second time, I pushed the clutch in right when I saw the engine begin to labor and the revs came back up and seemed to prevent the stall.
Is there any way the clutch can engage itself even if I'm in neutral? It's kind of bizzare and disturbing too.
Now that I think of it, there was one instance a while ago where something similar happened. I also found that pushing in the clutch allowed the revs to come back up (again, I'm neutral the whole time).
Ken
There's a TSB for the '98s popping out of first gear, a bad 1->2 synchro. Not sure if that would affect a car in neutral, though. Bizarre.
-juice
The tech told me that it was more a shifter fork tolerance issue rather than the synchros.
Anyway, this recent thing is weird. Oy!
Ken
You got an early production '98, version 1.0! :-)
-juice
Ken
Neways, it's time to get v1.0 turbo!
-juice
it's not the clutch... think about that, if you're in neutral it doesn't matter if the clutch is engaged or not, vehicle does not move nor does the engine labor much spinning the input shaft or only the flywheel.
something ain't right in that tranny case...
-Colin
You're right -- it couldn't be the clutch since pushing it in relieves the problem. But the strange thing is that the vehicle doesn't jerk forward immediately. I start the engine and let off the clutch and a few seconds later the laboring begins.
Perhaps the tranny is just *slightly* in gear even when in neutral and the initial engine surge right after it turns over is enough to overcome the initial drag. Once the RPMs begin to settle, it bogs down and stalls. Is that plausible?
I'm driving down to Santa Cruz Subaru next Monday -- they were the last ones to crack open my tranny.
Ken
I actually suspect your shifter fork and related parts that locate the gears are not adjusted correctly, but this would not explain the tendancy to start moving the car a couple seconds AFTER you let the clutch out in neutral. With a manual, it's either in gear or its not, and were it to engage a couple seconds later to start moving the car, you'd hear sounds that would curl your teeth. See above for theory...
Very strange indeed, and the only way this will be solved is to have the tranny cracked open. I definitely want to hear how this plays out.
IdahoDoug
I've browsed this message board and it seems my problem is not a new one. I just replaced the driver's side rear wheel bearings for the second time in 14 months at $400-$460 each time.
My question is whether to think about selling it and trying something else. I bought it new, it's got about 68,000 miles on it, and will be paid off in 5 months. I was looking forward to not having a car payment for awhile, but wondering if it is cost-effective to keep it. My mechanic also mentioned that the struts may need to be replaced soon as well.
Also, what is my course of action with Subaru? It's not under warranty anymore, but this is obviously a common problem, so what do I do next?
Thanks, SW
you are actually close, but a malfunctioning manual transmission could behave exactly as Ken is describing... I just didn't have time for a technical explanation a few hours ago at work.
the shifter forks pull or push dog teeth into engagement which determines which of the gears on the output shaft will be driven by the layshaft. what seems to be happening to poor ken is that the dogs in one of the forward gears-- yes, possibly 1st-- are not disengaging completely. he's therefore "sort of" in gear, but when not fully engaged the dogs shouldn't take much torque before slipping out.
ken, the next time this happened if you were to have open ground all around and you just gave it gas instead of clutch, I bet you'd crab forward just a bit and then hear a nice "bang" as it forcefully dropped into neutral. this is more likely to happen than the dogs fully engaging (and putting you completely in 1st gear) because the shift lever and forks aren't in the right place for that.
check out this animation:
http://auto.howstuffworks.com/transmission3.htm
-Colin
-Brian
Steve
steve-v
Santa Cruz
I doubt you'll ever see that happen. A diesel engine needs to be undersquare due to the way diesel combustion works. low rpm, needs a long stroke to make torque, large bores are useful at high rpm which diesels never reach.
whereas due to its horizontally opposed layout, the boxer engine has a very short stroke and uses significantly oversquare bores to get maximum useable displacement out of a given engine size.
look around at the bore & stroke specifications on some car sites (here on edmunds or perhaps try autos.msn.com) and see for yourself.
if there's ever a diesel powered Subaru, it probably won't be a horizontally opposed engine. as an oil company employee, I think it's best if I avoid going into a spiel about vegetable diesel. ;-) I bet you could double your mileage as it is if you replaced your 1900cc carbureted four with a 1.8L SOHC 16V EJ engine, say 1995 Impreza vintage, and used the right gear ratios.
-Colin
Colin -- Thanks for the links. I am suspecting the same as well. When I had the first gear popping out problem, the dealer said it had to do with the fork being biased a certain way. Perhaps they over corrected and now it tries to stay in first.
So, when I bring my vehicle in I probably should indicate the details of how I pull into my garage. It sounds like if one shifted to a different gear before starting, one may not be able to replicate the problem.
Ken
Serge
There may be a nail/screw or its like embedded between the threads in the sip (sp).
I had a tire doing the thumps but could not find anything at first. Removed the tire and went through it thread block by thread block until I found a screw embedded and hidden as described.
-Dave
I am with you on your theory, but what bugs me is when Ken said:
"- Normal procedure: E-brake up, in neutral, clutch in, turn key, wait for pump to prime, start engine, clutch out
- Revs rise to 1500RPM
- Seconds later, revs begin to drop to around 1000RPM, engine labors as if clutch is engaging (I'm in neutral!)
- Car jerks forward and stalls, thanks to the e-brake!"
From this, I gather that he lets the clutch fully out and nothing happens as would be normal since he's in neutral. THEN, the engine begins to labor and it feels like the clutch is beginning to engage, the car lurches and the stall happens. To me, if there's a forward gear engaged (even if it's the dog gear only) the engine would immediately labor and stall before the clutch is out because there's a direct connection on a manual - no tranny slippage like an auto torque converter. And if it's partly engaged, you'd get instant grinding.
So, I cannot see how the clutch is let out uneventfully, and THEN a progressive amount of engine load is somehow transmitted here.
So, I'll kinda disagree that your scenario could be possible, but frankly I have no plausible theory myself as to how this can happen on a manual. Very strange.
IdahoDoug
regarding the earlier comment about synchros... yes that's how they work. I might suspect the synchros are blown on whatever gear is responsible, the first gear synchro sucked previous to 1999 anyway.
ken if you want to avoid this behavior before you get back into the shop, I would suggest engaging 2nd gear then neutral. I bet you pull into your garage or parking stall in 1st gear, nearly everyone does.
-Colin
In either way, I'll let you know what the dealer finds.
Colin -- what changes were there to the 1st gear synchro in '99?
Ken
I am sure that it was far harder for '98 2.5RS and Foresters could not get back down into first gear while moving, whereas the 1999 models could do so easily. they also altered the linkage at the same time, less rubbery and shorter travel.
-Colin
Here, I found two:
Make: SUBARU
Model: FORESTER
Year: 1998
Service Bulletin Number: 034899
Summary Description:
VEHICLES EQUIPPED WITH MANUAL TRANSMISSIONS MAY EXHIBIT FIRST GEAR POPPING OUT WHILE DRIVING. *TT
Make: SUBARU
Model: FORESTER
Year: 1998
Service Bulletin Number: 17
Summary Description:
SUBJECT REGARDING SHIFTER RATTLE. *JG
-juice
If you do a search on NASIOC.com, you might even find part numbers. I saw them once. Tell your dealer to use these. Call 800-SUBARU3 and point out that they didn't, ask for reimbursement or a free 3rd repair, using those parts.
As for the struts, those are a normal wear and tear item. Yesterday I saw a BMW 318i bouncing up and down repeatedly when hitting dips in the road. His shocks were toast. 68k miles sounds about right, actually. Some people ride on them longer but by then they're not performing like new.
-juice
The shifter rattle (no surprise, I had that too) was caused by a bolt that was too long, IIRC.
I noticed that while the engine is warming up, I can get the rpms to change very slightly as I press on the clutch. When I clutch in, the rpms go up by a 100, when I clutch out, it drops the same amount. It goes away once the engine is warmed up.
Are the hydraulics for the clutch powered by the engine in anyway? I'm just looking for other clues to help the dealer today.
Ken
Also, I just rotated my tires @ 7500 miles and checked the front & rear pad & disc wear (I noticed I need a little brake fluid). The pads seem a little thinner than I'd like them to be on the front for the mileage I have. They look fine on the rear. Anyone care to chime in on typical wear for those? I know everyone's different but I'm used to going about 30,000 miles before I change the pads and I don't think these are going to make it that far.
Thanks
Larry
Any how, quick wear is better than squeeky brakes, so be careful what you wish for. I'm lucky that mine are also quiet. Pads are cheap, I'd just change 'em.
Maybe it's the Hill Holder on yours?
-juice
I always thought that an adjustable vacuum booster such as found on the brake system would be great for the heavy cluch of my old truck, but I do not think such a thing exists.
Steve
Hope this makes sense.
MNSteve
Make sense?
MNSteve
See if that's it.
-juice