Hanging At 2,000 Rpm

B303, GT40X, 5 speed
Hey guys this car is still hanging at 2,000 RPM for 10 seconds when out of gear then returns to idle. Every now and then it searches to 1500. Here's what's been done recently -

TFI Module, Plugs, Cap, Rotor button, Idle Air Bypass, TPS, Coolant Temp Sensor. These are all brand new. The TPS is set at .98. I did adjust the idle screw and it sits mostly at 1,000 rpm when warm. Until it's warm it tries to idle down to 600-700. Otherwise it runs great. That B303 does NOT like to idle under 900.

Question - Isn't there a sensor on the brake and a neutral safety switch somewhere? Could that be causing it to hang? Could it be the throttle linkage?

I will go back through the surging idle checklist as well. I'll look at that now.

Okay I'll try that. Thanks

I know this is a really old post but I am still having this issue. I haven't driven my mustang in literally a year. My Focus ST met with a deer Friday, and now I need my stang.

The hanging idle isn't so bad as the POPPING OUT OF THE EXHAUST. This has to be timing related but it's sitting at 14 or 16.

MFE92 said:

I guarantee your problem is a failing connection at the 10-pin connectors clipped to the back of the intake throat. Take them apart, clean them with MAF cleaner, then carefully tweak each individual pin so it makes a tighter fit with its mate on the other side of the connector. Reconnect and disconnect the connectors a few times so you get nice clean contacts, connect them one last time, and be done with it.

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I will try that tonight kind sir!

Any other ideas are welcome. My friend suggested the grey insert pin that goes into the distributor may be to blame?