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Drop in engine speed!!!

 
  #1  
Old 07-29-2005, 03:41 PM
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Drop in engine speed!!!

While driving a constant speed, 40, 50, 70 etc., when I get out of it, the engine speed drops about 500 rpm's. When I put my foot back in it, theres like a dead space there where it 'catches up'. This doesn't seem normal but I've never driven another diesel. I have to ease my foot back in it to avoid a jerk. Anybody experience anything like this? Thanks.
 
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Old 07-30-2005, 06:53 AM
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Is anyone out there?
 
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Old 07-30-2005, 08:30 AM
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Rirwin,

If I get you right, you put your foot back into it and you get a lag then the truck punches itself up. Ive been told this is turbo lag, so I think everything is fine engine wise, your shift kit maybe some of the jerk you are getting. Up shift or down shift
 
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Old 07-30-2005, 09:03 AM
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Originally Posted by rirwin
While driving a constant speed, 40, 50, 70 etc., when I get out of it, the engine speed drops about 500 rpm's. When I put my foot back in it, theres like a dead space there where it 'catches up'. This doesn't seem normal but I've never driven another diesel. I have to ease my foot back in it to avoid a jerk. Anybody experience anything like this? Thanks.
Sounds like your torque converter is not locking up for whatever reason. Might want to get that addressed ASAP. Running with an unlocked TQ will make LOT's of excess tranny heat.
 
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Old 07-30-2005, 08:40 PM
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It sounds normal to me. When you lift the torque converter unlocks. This allows the engine speed to drop. When you get back into the pedal there is a delay for the torque converter to lock. This delay is in the computer programming. After about 2-3 seconds the torque converter will lock again and the engine speeds drops.
 
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Old 07-30-2005, 08:51 PM
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Mine does this as well, Casey is right on
 
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Old 07-30-2005, 09:08 PM
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yes, as said before completely normal. its a good time to hear the turbo spool up before you get pushed into the seat
 
 


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