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Registered
Join Date: Oct 2002
Location: Huntsville, AL
Posts: 1,646
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Un-even Idle
When we let off the throttle, the engine will dip in rpms, then go back to normal. What causes? Replacing the plugs might help a little, but i doubt that it will fix the problem.
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2015 GLK (Momma's ride) 2016 F-250 2001 BMW M5 65 CSX 427 Roadster |
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07-17-2003, 04:59 AM
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Registered
Join Date: Oct 2002
Location: Palm Bay, Florida
Posts: 317
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This is normal for the 44. To correct you will need to chip the dme. I recommend the FRWilk chip.
Rick
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'83 944 "Guards Red" New Everything (seems like) 16" 968 Wheels has never left garage (yet) |
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07-17-2003, 07:29 AM
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Registered
Join Date: Dec 2002
Location: Richmond, VA
Posts: 484
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There is a miss match between the mechanical idle by-pass on the throttle body, and the Idle Stabilizer.
At any thing above an idle the IS is closed. When you let off the throttle the engine RPM is falls faster than the IS can react to, so the engine "stumbles" coming to an idle. The way to correct this is to put a jumper wire between terminals B and C on the service port located on the driver side fender near the brake booster, connect a tach to the coil primary (green) wire and ground, start the engine, and then use the by-pass screw on the throttle body to set the idle RPM to 840 +- 50 RPM.
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Cliff Hipsher '87 944 India Red '86 951 Kalahari Metallic |
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07-21-2003, 09:08 PM
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