Drop in engine speed!!!
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Senior User
Joined: Sep 2004
Posts: 153
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From: Texas Gulf Coast
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.
Junior User
Joined: Jul 2005
Posts: 82
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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
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
Fleet Owner
Joined: Jun 2004
Posts: 25,090
Likes: 1,111
From: Rio Rico, AZ.
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.
Posting Guru
Joined: Jul 2003
Posts: 2,210
Likes: 2
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.
