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Join Date: Jan 2010
Posts: 8
Hesitation Problem

Guys...hope all is well.

I took my stock '87 911 turbo out yesterday after sitting for approx two months. When I got it out to the highway I noticed some hesitation around 3k rpm (when boost started to come on). After 3700 all was smooth....

Any thoughts?

Thanks in advance for your help.....

Last edited by 87turbo87; 03-07-2010 at 02:15 PM..
Old 03-07-2010, 02:10 PM
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Join Date: Jan 2008
Location: Weehawken, NJ
Posts: 3,307
Sounds like it could be fuel mixture or ignition issue. Did you put any fuel stabilizer in the tank before the 2 month lay up? Stored with the gas tank full?

I'd go through the basic tune-up checklist, check fuel pressure, check plugs, wires, cap & rotor, set ignition timing, etc...start with the basics.
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Jacob
Current: 1983 911 GT4 Race Car / 1999 Spec Miata / 2000 MB SL500 / 1998 MB E300TD / 1998 BMW R1100RT / 2016 KTM Duke 690
Past: 2009 997 Turbo Cab / 1979 930
Old 03-08-2010, 05:45 AM
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Location: Central Washington State
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Could be an O'ring in the IC plumbing about to go, starting to leak when boost pressure builds. That would cause a pig rich condition and associated loss of power. One of many possibilities.

Follow Jacob's thoughts, though. Check all the basics first.
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Mark H. 1987 930, GP White, Wevo shifter, Borla exhaust, stock everything else. The result of a massive Pelicanite good will fire recovery effort. Truely an open book, ready for the slippery slopes to modification.
Old 03-08-2010, 07:15 AM
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Posts: 1,257
^^^^^^^^^^^^^^
Everything they said....

Plus-chk all hoses,ignition-electrical,mechanical-Take your time--get a chair and sit behind the car,ponder,chk-list,&get to work...

For me I did it...AND still couldn't figure it out...Finally pulling the plugs/looking at them,,,Gave me my answer..

Maybe some Marvel myst. oil/gas line will clear it up.

Last edited by wjfk32; 03-08-2010 at 08:12 AM..
Old 03-08-2010, 07:46 AM
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Blaine Sellie's Avatar
 
Join Date: Jul 2003
Location: Sammamish, WA USA
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Garage
Same thing happened to me last year....and became worse over time. Mine was a sticky fuel head plunger..cured in 20 minutes my running Techron concentrate in the fuel....cheap option.
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1988 Porsche 930 Factory Slantnose- B&B Headers, GHL dual exhaust, K27-7200, Tial WG, B&B Intercooler, RSR Coilovers, Poly Bronze bushings. Dynoed at 373 hp/389 tq
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Old 03-08-2010, 08:10 PM
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