Subject	might be caused by the ECU
Posted by	zromtech on January 07, 2014 at 3:07 PM
	This message has been viewed 201 times.
In Reply To	Hesitation please help!! posted by pfitzgerald on January 02, 2014 at 09:11 PM
Message	What temperature do you mean by 'warm'? Operating temperature (~75C) or something less than that? Under specific warm-up conditions, the ECU retards the timing significantly to rapidly heat up the catalytic converters via elevated exhaust gas temperature (EGT). This causes low-rpm hesitation/power loss and stumbling (RPM drop) on transition from idle to throttle. The symptoms go away abruptly above 2600rpm and when coolant temp reaches 55C. The ECU only does this when coolant temp is between 30 and 55C, so the hesitation may not be there when you first start driving, but will start happening once coolant temp hits 30C. Sam
Follow Ups	Hesitation please help!! - pfitzgerald 21:11:22 01/02/14 I think you're only half way though checking all possible - Medallion Man 03:39:45 01/03/14 Re: I think you're only half way though checking all possible - pfitzgerald 12:29:10 01/03/14 Did you just set the TPS or test it too? - ThisIsSparTTa 09:27:39 01/03/14 Re: Did you just set the TPS or test it too? - pfitzgerald 12:30:20 01/03/14 Re: Hesitation please help!! - BarryGZX 11:02:00 01/03/14 Re: Re: Hesitation please help!! - pfitzgerald 12:36:56 01/03/14 Re: Hesitation please help!! - BlackTwins 17:57:50 01/03/14 Re: Hesitation please help!! - pfitzgerald 16:09:48 01/06/14 might be caused by the ECU - zromtech 15:07:58 01/07/14 Re: might be caused by the ECU - pfitzgerald 20:19:07 01/08/14
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