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Connor McElligott
Tinkerer
ACT
V8 UZZ31

Posts: 14
Reg: 09-2011

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Friday, December 16, 2011 - 04:55 pm, by:  Connor McElligott (Solveig)

After many an hour spent, my mechanic managed to find that the cause was from the wiring connected to the Engine Speed Sensor. It had worn through and was pulsing the current.

With that fixed, it seems to be idling particularly high, as well as low. When you first turn it on from cold, it'll generally rev up to about 1800 and step down to roughly 1100.
When driving and letting off the throttle it'll sometimes sit at around 1200 RPM, making it difficult to slow down, as well as come to a stop. A lot of the time it'll actually slowly gain in speed on a flat at around 40KMP/h.
Otherwise, if it isn't idling too high, it'll idle too low, down around the 500 RPM mark.

Soarer has had the Fuel Pump ECU replaced with Raphaels one and has had the Mines ECU reset as well as the IAC Valve cleaned off. Both of us have noticed that the idle screw has been tampered with as well as the electrical unit next to it.

Does anyone have any idea how to get the idle speed to sit properly again?

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