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idlesurge [2011/08/18 09:14]
twdorris
idlesurge [2011/10/10 13:04]
dmertz
Line 18: Line 18:
   * a damaged diaphragm in the wastegate actuator   * a damaged diaphragm in the wastegate actuator
   * a damaged diaphragm in the power-brake booster   * a damaged diaphragm in the power-brake booster
 +
  
  
Line 27: Line 28:
 You may find that screwing the BISS all the way in doesn'​t bring the idle speed down to idle speed configured in DSMLink/​ECMLink. ​ That means that some other path is allowing too much air to pass.  First make sure that there is no leakage into the BISS hole by covering the hole with your finger. ​ If the engine speed drops when you cover the hole, replace the BISS O-ring. You may find that screwing the BISS all the way in doesn'​t bring the idle speed down to idle speed configured in DSMLink/​ECMLink. ​ That means that some other path is allowing too much air to pass.  First make sure that there is no leakage into the BISS hole by covering the hole with your finger. ​ If the engine speed drops when you cover the hole, replace the BISS O-ring.
  
-Next, investigate possible problems with the Idle Speed Control (ISC) servo. ​ Open the ECU and [[Driver01|inspect for burned ISC driver chips]]. ​ If you find any, [[http://​www.ecmtuning.com/​product/​servicerequest|contact ECMTuning regarding repair of the ECU]]. ​ If there //are// burned drivers, it's quite possible that the damage was caused by ISC itself having a shorted coil.+Next, investigate possible problems with the Idle Speed Control (ISC) servo. ​ Open the ECU and [[Driver01|inspect for burned ISC driver chips]]. ​ If you find any, [[http://​www.ecmtuning.com/​product/​servicerequest|contact ECMTuning regarding repair of the ECU]]. ​ If there //are// burned drivers, it's quite possible that the damage was caused by ISC itself having a shorted coil.  Make sure you are using the correct O-ring to seal the ISC to the throttle body. An O-ring that's too thin might not seal, too think and it might not allow the ISC to fully close the airway.
  
 [[http://​www.youtube.com/​watch?​v=KibYz21IMA0|Test the coils in the ISC.]] (Note that the newer, more reliable, all-black ISCs normally measure about 39 ohms.) ​ Inspect the tip of the ISC for any physical damage. [[http://​www.youtube.com/​watch?​v=KibYz21IMA0|Test the coils in the ISC.]] (Note that the newer, more reliable, all-black ISCs normally measure about 39 ohms.) ​ Inspect the tip of the ISC for any physical damage.
idlesurge.txt ยท Last modified: 2016/01/12 18:41 by nickracer