wow, the car sounds great as far as the previous owner and condition..
i'd really suggest making sure the detonation light *IS* in fact
working. there are a few codes that are likely being thrown which will
retard the timing a lot. i forget the exact value, but some of the
more serious codes retard the timing to a point where the car almost
wont accelerate at all (going up a slight hill is totally out of the
question).
if the overboost switch was kicking in early (which i doubt) it would
be very erratic and undriveable above that level of boost. but it
sounds like it still runs, but just doesn't pull, right?
i'd think its something ignition related, but i'm not sure.. when you
are above 3k rpm and you roll on the throttle does it feel like its
running out of gas (literally), or does it feel like it keeps running
but just looses lots of power.
anyone else have any ideas?
/august
On 9/16/05, Charles Lincoln <clincoln@spiritone.com> wrote:
> Thanks for your help so far, August, on the 1987 505 Turbo I'm considering
> buying.
>
> On 09/16/2005 10:33 AM, "august" <august.macbeth@gmail.com> wrote:
>
> > So when you give it a good amount of gas, as soon as it hits 3k rpm it
> > just stops accelerating? or doesn't accelerate as fast? does it feel
> > like its hesitating at all?
>
> At 3k rpm it suddenly/noticibly hesitates (not sure Iıd call it a hard jolt,
> but comes close) then maintains current speed/rpm (no further acceleration).
> Back off on the accelerator then accelerate more gently and it works ok.
>
> > does it pull harder down below 3000rpm?
>
> Much harder than the XN6!
>
> > If it does in fact have a faulty wastegate actuator, the overboost
> > switch *should* kick in, if this happened, you'd know it. It cut's
> > fuel so it would be a solid jolt.. If the overboost switch isn't
> > working correctly you would hear a ton of detonating.. either of the
> > options suggested above are worse case.
>
> Iım pretty sure I would have heard detonation, if it was happening. Can the
> overboost switch work prematurely? Or if faulty wastegate actuator, working
> properly; thus, preventing detonnation and not damaging the engine. In
> which case rebuilding the turbo would be called for?
>
> > there's a little yellow LED on the bottom of the instrument cluster,
> > did you notice if that came on when you had the key in the 'ON'
> > position, or while you were driving at all?
>
> Detonation/engine code light: did not come on while driving; I didnıt notice
> whether it came on or not when initial put the key to ON position. As
> mentioned in the original post, the dash turbo gauge does not work.
>
> > If that light comes while you're driving the car, it means it's thrown
> > a code, and could possibly be retarding ignition timing waay back
> > which would cause a HUGE loss in power.
>
> The power loss is more than if one just lifted foot from accelerator.
>
> > I'd suggest making sure the detonation / engine code light is in fact
> > functioning, and if you could, hook up a boost gauge to see whats
> > going on while driving. have you checked ignition timing already?
>
> I havenıt checked the ignition timing, however ³normal driving and
> acceleration² does suggests that it is ok. I donıt have a boost gauge nor
> know to hook it up. I should get one (remember the 1985 TD I bought 2 weeks
> ago & still donıt know anything about).
>
> > if there is in fact a problem with the wastegate, and its been
> > overboosting for god know's how long, i'd pass on the car.
>
> Thanks for mentioning that. I was initially tihinkig worst case is turbo
> replacement and I could offer an and amount to account for that. But if
> detonation Iıve got the engine to be concerned about, too.
>
> BTW, I donıt suspect hard driving and misuse. Current owner is in his 70s
> and also has 2 1985 505 S wagons. Heıs had this car for 12 years/65k of
> 125k total miles. Body and interior are immaculate; and itıs the first
> repainted 505 Iıve seen that has a 1st quality paint job.
>
> Charlie Lincoln
> clincoln@spiritone.com
>
>
>
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Received on Fri Sep 16 12:28:23 2005
