Idle still bounces with TPS unplugged
09-04-18, 09:39 PM
#4
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09-09-18, 03:12 PM
#8
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Update
Set the TPS and the idle air screw at the top. Idle was still bouncing but not as fast. Was checking for vacuum leaks and removed a vacuum line for the heck of it. The idle smoothed out to a steady 800 rpm once a vacuum leak was created. Could this be a faulty BAC?
09-10-18, 06:38 PM
#10
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I did, i'm wondering if this issue is a symptom of a bad BAC?. The idle will only start to hunt when the engine is under load. Like when pressing on the brakes or rolling the window down.
09-11-18, 04:43 PM
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09-11-18, 08:51 PM
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I mean if you have no vacuum leaks, id double check the tps when your having the condition. Also look at the throttle linkage while the engine is running, make sure it's not partially open. See if you can close it more.
09-19-18, 05:17 PM
#17
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Update
cleaned out the BAC. I can get it to idle steady at 1200 rpm anything lower with load on the engine the idle starts to surge up and down. Not sure why. TPS set to 1V closed throttle
09-20-18, 07:57 PM
#18
If your car is a s4: To set the tps, bring the car to operating temperature. Unplug the tps. Using a multimeter measure resistance between the black and green wires. Turn the adjustment screw until you reach 1k ohm. While you're at it slowly run the throttle to 100%, it should gradually reach between 4-6k and ohm.
if you're concerned about the BAC being bad, unplug it, the car will idle fine without it, that should answer that quickly.
if you're concerned about the BAC being bad, unplug it, the car will idle fine without it, that should answer that quickly.
09-21-18, 02:53 PM
#19
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If your car is a s4: To set the tps, bring the car to operating temperature. Unplug the tps. Using a multimeter measure resistance between the black and green wires. Turn the adjustment screw until you reach 1k ohm. While you're at it slowly run the throttle to 100%, it should gradually reach between 4-6k and ohm.
if you're concerned about the BAC being bad, unplug it, the car will idle fine without it, that should answer that quickly.
if you're concerned about the BAC being bad, unplug it, the car will idle fine without it, that should answer that quickly.
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