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Writer/Teacher
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Surging idle when driven hard
The last couple times I've taken the 944 out, the idle surges after I really push it (5000+rpm). It will run fine on-throttle, but after the hard driving, at idle, the revs will drop to about 300rpm, then come back to 1000, then drop to 400 or so, come back to 1000, drop to 500 or so, until it evens out.
My first thoughts were "vaccuum leak" and "TPS," but I was wondering which of these would have anything to do with the spirited driving...
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Current Stable: Black 07 Porsche 987 Cayman S: Long-Tube Headers; FabSpeed Exhaust; VividRacing ECU Tune; IPD Plenum; 997GT3 Throttle Body. Blue 1983 Porsche 928S. 1985.5 Porsche 944 Rat Rod. 2011 Acura MDX. 2008 Mazda 3. Gone But Not Forgotten:Garnet Red 86 Porsche 951("The Purple Pig"). Alpine White 83 Porsche 944 ("Alpine Wolf"). Guards Red 84 Porsche 944. |
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06-22-2006, 08:03 PM
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Mein Gott!
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I have a semi-related problem (it idles at 1300 and stays there only after warmed up and being driven hard). I'm thinking vacuum leak or TPS, too. Easiest thing first - do the search for a leak with some carb cleaner when its idling funny. This might reveal something quick.
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Johnny 1987 944S 1984 944 (R.I.P.) 1972 Triumph TR6 - 100% trouble free between breakdowns 2003 BMW 325xi |
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06-23-2006, 07:32 AM
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2007 Porsche Cayman S
The Viridian Falcon
SOLD! -- The Purple Pig
SOLD! -- Mighty Mouse
SOLD!! -- Alpine Wolf
