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nnn nnn is offline
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Join Date: Dec 2009
Location: Weston Florida
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Turbo Chatter/Sputter?

For lack of a better words...

It feels like my engine sputters sometimes when I kick in boost..... Boost needle goes to .8 but engine does not want to go and I have to back off..... Then it runs perfect and strong....

I am trying to keep a log of when it happens - but today it was when I was just cruising around town under no boost for a while - then kicked in boost at a light and it felt like maybe fuel starvation...

The other day I was running at maybe 3k on the highway for a while and then I could feel the same thing "without any boost"..... Engine just got ruff and then it went away...

I am not much of a wrench - Sorry cant explain better....

Fuel filter or ?

Any help would be greatly appreciated.....

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Old 12-13-2009, 07:45 AM
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Location: Central Washington State
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Stock motor or modified? Did this start just suddenly one day, or has it slowly been coming on and getting worse over time?
Since it seems to be boost related, I would suspect maybe the WUR is faulty and dropping control pressure too far - going too rich. Or, maybe a simple vacuum or air leak which would result in the same thing (rich on boost). Other possibilities are weak or erradic spark.

You're gonna have to get some readings on things like control pressures, AFR/CO%, ignition timing, plug condition, intercooler O'rings and pipes/hoses for leaks, to help narrow down the fault.
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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 12-13-2009, 08:25 AM
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Location: west palm beach fla
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n i am in west palm if you are up for a road trip. i sorta got these things figured out, and a buddy of mine right down the street is a 930 guy as well
Old 12-13-2009, 12:51 PM
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Could be that the car is running to rich and causing it to buck. You need to put a wideband on the car and run it to see your readings. Could be an easy fix, IE adjustment screw.

Rob
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1985 Euro Red Carrera Coupe."SOLD",1985 White Targa Carrera. "SOLD",1977 Yellow 930. "SOLD",1991 Black 964 C4. "SOLD",2002 Silver 996 C4 Cab "SOLD",
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Old 12-13-2009, 01:04 PM
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i'm starting to wonder if there's more of these cars in s. florida than anywhere else in the states.

one good thing here is we have no emission inspections and can drive them year round.
Old 12-13-2009, 01:10 PM
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