egr delete questions
Mountain Pass
Joined: Jul 2007
Posts: 239
Likes: 4
From: north carolina
ill give 26k is a big load.
check cooling fan operation, check fanss pid aginst engine rpm fanss should be about 2800 at 2500 rpm.
if you are getting a squeeling noise while under load you may have abelt slipping. check the water pump pully were the belt rides if it missing paint that means that the belt is slipping.
also if the truck is still under warranty you can question the dealer about replaceing the belt tensioner as that is a 5/100 part.
check cooling fan operation, check fanss pid aginst engine rpm fanss should be about 2800 at 2500 rpm.
if you are getting a squeeling noise while under load you may have abelt slipping. check the water pump pully were the belt rides if it missing paint that means that the belt is slipping.
also if the truck is still under warranty you can question the dealer about replaceing the belt tensioner as that is a 5/100 part.
Posting Guru
Joined: Jan 2009
Posts: 1,321
Likes: 0
From: Mattawa Washington.
Here is how your fan works:
Engine temperature is not the only parameter that the PCM monitors to determine cooling fan operation. This is the reason that you will see some variation in engine temperature as it correlates to fan operation. The operation/description of the FSS (Fan Speed Sensor) from the PC/ED manual has a fairly good explanation as to how the system "thinks". This is not your traditional engine hits temp X and the fan clutch locks up. The fan speed sensor is a Hall-Effect sensor integral to the vistronic drive fan (VDF). The powertrain control module (PCM) will monitor the sensor input and control the VDF speed based upon engine coolant temperature (ECT), transmission fluid temperature (TFT) and intake air temperature (IAT) requirements. When an increase in fan speed for vehicle cooling is requested, the PCM will monitor the FSS signal and output the required pulse width modulated (PWM) signal to a fluid port valve within the VDF
Here is an explanation from one of the members here ( I think it was Bismic that provided it) so no credit to me..If you have more questions maybe someone can explain better..
Engine temperature is not the only parameter that the PCM monitors to determine cooling fan operation. This is the reason that you will see some variation in engine temperature as it correlates to fan operation. The operation/description of the FSS (Fan Speed Sensor) from the PC/ED manual has a fairly good explanation as to how the system "thinks". This is not your traditional engine hits temp X and the fan clutch locks up. The fan speed sensor is a Hall-Effect sensor integral to the vistronic drive fan (VDF). The powertrain control module (PCM) will monitor the sensor input and control the VDF speed based upon engine coolant temperature (ECT), transmission fluid temperature (TFT) and intake air temperature (IAT) requirements. When an increase in fan speed for vehicle cooling is requested, the PCM will monitor the FSS signal and output the required pulse width modulated (PWM) signal to a fluid port valve within the VDF
Here is an explanation from one of the members here ( I think it was Bismic that provided it) so no credit to me..If you have more questions maybe someone can explain better..
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