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Old 10-12-2005, 09:01   #1 (permalink)
Dick
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1989 turbo 760 loosing power up hill but runns smooth down hill orlevel

1989 turbo 760 loosing power up hill but runns smooth down hill or level.
Engin is nt shaking so sparkplugs are not a suspect
gears shift ok on downslope so tranny seems ok. when Turbo kicks in it
seems to immediatly drop power more, pulling bac ccelerator actually
speds it up a bit.
antifreeze is topped up, the car did not overheat.

Looks like Turbo problem.
What is your opinion on the possible causes?
Dick
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Old 10-12-2005, 13:01   #2 (permalink)
Randy G.
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Re: 1989 turbo 760 loosing power up hill but runns smooth down hill or level

Dick <tungfree@Hawaii.rr.com> wrote:

>1989 turbo 760 loosing power up hill but runns smooth down hill or level.
>Engin is nt shaking so sparkplugs are not a suspect
>gears shift ok on downslope so tranny seems ok. when Turbo kicks in it
>seems to immediatly drop power more, pulling bac ccelerator actually
>speds it up a bit.
>antifreeze is topped up, the car did not overheat.
>
>Looks like Turbo problem.
>What is your opinion on the possible causes?


I am not turbo savy, but this generally sounds like a fuel-quality
problem. The computer may be retarding the spark because the knock
sensor is sensing knock or ping. Try a tank or two of high-quality
(name brand) premium fuel.

Otherwise, you are giving it more air but it isn't getting more fuel,
so suspect an air leak between the AMM and the throttle body or a
vacuum leak somewhere.

Just guessing...

__ __
Randy & \ \/ /alerie's
\__/olvos
'90 245 Estate - '93 965 Estate
"Shelby" & "Kate"
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Old 10-12-2005, 15:02   #3 (permalink)
Boris Mohar
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Re: 1989 turbo 760 loosing power up hill but runns smooth down hill or level

On Wed, 12 Oct 2005 10:53:16 -0700, "Randy G." <frcn@DESPAMMOcncnet.com>
wrote:

>Dick <tungfree@Hawaii.rr.com> wrote:
>
>>1989 turbo 760 loosing power up hill but runns smooth down hill or level.
>>Engin is nt shaking so sparkplugs are not a suspect
>>gears shift ok on downslope so tranny seems ok. when Turbo kicks in it
>>seems to immediatly drop power more, pulling bac ccelerator actually
>>speds it up a bit.
>>antifreeze is topped up, the car did not overheat.
>>
>>Looks like Turbo problem.
>>What is your opinion on the possible causes?

>
>I am not turbo savy, but this generally sounds like a fuel-quality
>problem. The computer may be retarding the spark because the knock
>sensor is sensing knock or ping. Try a tank or two of high-quality
>(name brand) premium fuel.
>
>Otherwise, you are giving it more air but it isn't getting more fuel,
>so suspect an air leak between the AMM and the throttle body or a
>vacuum leak somewhere.
>
>Just guessing...
>
> __ __
> Randy & \ \/ /alerie's
> \__/olvos
>'90 245 Estate - '93 965 Estate
> "Shelby" & "Kate"



That is a good guess



Regards,

Boris Mohar

Got Knock? - see:
Viatrack Printed Circuit Designs (among other things) http://www.viatrack.ca

void _-void-_ in the obvious place


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Old 10-12-2005, 22:01   #4 (permalink)
James Sweet
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Re: 1989 turbo 760 loosing power up hill but runns smooth down hill or level


"Dick" <tungfree@Hawaii.rr.com> wrote in message
news:7h93f.552$QM5.48@tornado.socal.rr.com...
> 1989 turbo 760 loosing power up hill but runns smooth down hill or level.
> Engin is nt shaking so sparkplugs are not a suspect
> gears shift ok on downslope so tranny seems ok. when Turbo kicks in it
> seems to immediatly drop power more, pulling bac ccelerator actually
> speds it up a bit.
> antifreeze is topped up, the car did not overheat.
>
> Looks like Turbo problem.
> What is your opinion on the possible causes?
> Dick


You've got a boost leak somewhere, check all the air hoses, particularly the
rubber joints at the intercooler.


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