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Ghost issues

 
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Paul  



Joined: 02 Nov 2002
Posts: 9349
Location: Southeast Wisconsin

PostPosted: Fri Nov 11, 2016 1:29 pm    Post subject: Ghost issues Reply with quote

The Ghost (87 924S) began stumbling under throttle a few weeks back. Ignition system checked out ok, no vacuum leaks found, compression good, fuel pressure was fine and responded properly when blipping the throttle. O2 sensor indicated rich mixture while stumbling.

Want to guess what it was?
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White 87 924S "Ghost"
Silver 98 986 3.6l 320 HP "Frank N Stein"
White 01 986 "Christine"
Polar Silver 02 996TT. "Turbo"
Owned and repaired 924s since 1977
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edredas  



Joined: 09 Dec 2004
Posts: 855
Location: Charlotte, NC

PostPosted: Fri Nov 11, 2016 1:59 pm    Post subject: Reply with quote

FPR?



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'86 944 -Garnet, Fully loaded, Koni suspension
'87 924S -Red, 300hp 951 swap
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Paul  



Joined: 02 Nov 2002
Posts: 9349
Location: Southeast Wisconsin

PostPosted: Fri Nov 11, 2016 2:43 pm    Post subject: Reply with quote

Yep!

I almost ruled it out when the pressures reacted properly and a vacuum check of the diaphragm resulted in it holding vacuum with the engine off.

With engine running however fuel dribbled out of the vacuum port!
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White 87 924S "Ghost"
Silver 98 986 3.6l 320 HP "Frank N Stein"
White 01 986 "Christine"
Polar Silver 02 996TT. "Turbo"
Owned and repaired 924s since 1977
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edredas  



Joined: 09 Dec 2004
Posts: 855
Location: Charlotte, NC

PostPosted: Sat Nov 12, 2016 9:42 am    Post subject: Reply with quote

Nice, something to look out for next time I'm troubleshooting. There were a few things that I was thinking could also cause that, and I almost ruled the FPR out since you had checked the fuel pressure, but it was the only thing that fit...

That said, we could play a long game of this with all the things I've come across in the shop.

I once had a guy tell me his 924S was overheating. When we started it up, it didn't take long before the gauge was heading into the red and it was puking coolant everywhere. There was no white smoke in the exhaust and the engine passed a compression test.

Anyone want to guess what it was?
_________________
'86 944 -Garnet, Fully loaded, Koni suspension
'87 924S -Red, 300hp 951 swap
'87 924S -Red, New Project
'87 924S -White, Automatic
'88 924S -Red, Daily Driver, Bone stock
'93 Mx6 -White, Megan Racing suspension
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KDJones2000  



Joined: 14 Sep 2010
Posts: 302
Location: Phoenix, AZ

PostPosted: Sat Nov 12, 2016 10:00 am    Post subject: Reply with quote

Bad coolant cap?
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1988 944 Turbo S
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edredas  



Joined: 09 Dec 2004
Posts: 855
Location: Charlotte, NC

PostPosted: Sat Nov 12, 2016 11:25 am    Post subject: Reply with quote

Nope, good guess though.

Any other guesses?
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'86 944 -Garnet, Fully loaded, Koni suspension
'87 924S -Red, 300hp 951 swap
'87 924S -Red, New Project
'87 924S -White, Automatic
'88 924S -Red, Daily Driver, Bone stock
'93 Mx6 -White, Megan Racing suspension
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Fifty50Plus  



Joined: 28 Feb 2008
Posts: 1013
Location: Washington DC area

PostPosted: Sat Nov 12, 2016 11:48 am    Post subject: Reply with quote

Stuck thermostat
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1979 924 NA race car
1982 924 NA race car - Sold
1982 924 Turbo almost a PoS
1981 924 Turbo a real PoS, new engine
1982 924 Turbo nice body, blown engine
1972 911 E race car - going to Vintage
Various 944s to become IT-S race car
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Rasta Monsta  



Joined: 12 Jul 2006
Posts: 11356
Location: PacNW

PostPosted: Sat Nov 12, 2016 12:14 pm    Post subject: Reply with quote

Broken impellor.
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edredas  



Joined: 09 Dec 2004
Posts: 855
Location: Charlotte, NC

PostPosted: Sat Nov 12, 2016 12:36 pm    Post subject: Reply with quote

Fifty50Plus wrote:
Stuck thermostat


Nope, but you're in the right area.



Rasta Monsta wrote:
Broken impellor


Yup, looks like the belt was too tight which bent the shaft, embedding the impeller into the waterpump. I would've thought I'd heard the belt squealing or some other signs, so it stumped the hell out of me...
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'86 944 -Garnet, Fully loaded, Koni suspension
'87 924S -Red, 300hp 951 swap
'87 924S -Red, New Project
'87 924S -White, Automatic
'88 924S -Red, Daily Driver, Bone stock
'93 Mx6 -White, Megan Racing suspension
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Fifty50Plus  



Joined: 28 Feb 2008
Posts: 1013
Location: Washington DC area

PostPosted: Sat Nov 12, 2016 1:57 pm    Post subject: Reply with quote

Ooohh, BMW impellers as well as Dodge Intrepids (plastic) would swell/shrink
and slip (not keyed or pegged) when hot and cause the same condition in traffic but not the open road.
_________________
1979 924 NA race car
1982 924 NA race car - Sold
1982 924 Turbo almost a PoS
1981 924 Turbo a real PoS, new engine
1982 924 Turbo nice body, blown engine
1972 911 E race car - going to Vintage
Various 944s to become IT-S race car
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