Subject	does it only happen during warm-up?
Posted by	zromtech on January 21, 2016 at 5:03 PM
	This message has been viewed 472 times.
In Reply To	hesitation posted by plenum on January 17, 2016 at 01:55 AM
Message	Does the hesitation abruptly go away above 2600rpm, and at medium/high throttle position? If it does then this could be normal ECU behavior to rapidly heat the catalytic converters, and is no cause for concern. Under certain cold-start/warm-up conditions, the ECU retards the ignition timing to raise the exhaust gas temperature (EGT), causing the catalytic converters to heat up to their operating temperature much more quickly. This is done on purpose to reduce emissions on engine warm-up but results in a noticeable hesitation at partial throttle below 2600rpm.
Follow Ups	hesitation - plenum 01:55:31 01/17/16 things to check - FrozTTy 07:14:45 01/17/16 Check the PTU and the Sub harness Plugs (n/m) - Cjw3 09:37:36 01/17/16 My Z did this exact thing when my TPS was set wrong. - Goldchocobo 15:40:38 01/17/16 does it only happen during warm-up? - zromtech 17:03:09 01/21/16
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