quick jerk
03-25-2017
#1
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quick jerk 07 Civic. Coming up to an intersection, almost stopped, but still moving about 1 or 2 mph, if I start to accelerate, I get a quick jerk in the car. Almost like it was in neutral, and then dropped back into gear.????? It never does this from a dead stop.
Has anyone had this happen to you? Where do I start to look?
Has anyone had this happen to you? Where do I start to look?
Last edited by sbeamer; 03-25-2017 at 09:21 AM. Reason: additional content
03-25-2017
#2
If you think a good mechanic is expensive, try hiring a bad one
Re: quick jerk
Wildass guess:
While slowing down the trans stays in 2nd gear until almost completely stopped.....then you make a sudden stab on the gas pedal which forces the PCM to make a downshift from 2nd to 1st gear, and that downshift is what you feel.
If you were to gently accelerate from the same rolling 2MPH, it may stay in 2nd gear and not jerk with a downshift.
Was I right? What do I win?
While slowing down the trans stays in 2nd gear until almost completely stopped.....then you make a sudden stab on the gas pedal which forces the PCM to make a downshift from 2nd to 1st gear, and that downshift is what you feel.
If you were to gently accelerate from the same rolling 2MPH, it may stay in 2nd gear and not jerk with a downshift.
Was I right? What do I win?
03-26-2017
#3
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Wildass guess:
While slowing down the trans stays in 2nd gear until almost completely stopped.....then you make a sudden stab on the gas pedal which forces the PCM to make a downshift from 2nd to 1st gear, and that downshift is what you feel.
If you were to gently accelerate from the same rolling 2MPH, it may stay in 2nd gear and not jerk with a downshift.
Was I right? What do I win?
While slowing down the trans stays in 2nd gear until almost completely stopped.....then you make a sudden stab on the gas pedal which forces the PCM to make a downshift from 2nd to 1st gear, and that downshift is what you feel.
If you were to gently accelerate from the same rolling 2MPH, it may stay in 2nd gear and not jerk with a downshift.
Was I right? What do I win?
03-26-2017
#4
If you think a good mechanic is expensive, try hiring a bad one
Re: quick jerk
If my guess was indeed correct and this is normal operation for the situation you put it in, you will have to either change your expectations or change your driving habits.
The reaction to specific input parameters is programmed into the PCM, you can't change it.
Roll onto the gas pedal less abruptly?
The reaction to specific input parameters is programmed into the PCM, you can't change it.
Roll onto the gas pedal less abruptly?
03-27-2017
#5
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If my guess was indeed correct and this is normal operation for the situation you put it in, you will have to either change your expectations or change your driving habits.
The reaction to specific input parameters is programmed into the PCM, you can't change it.
Roll onto the gas pedal less abruptly?
The reaction to specific input parameters is programmed into the PCM, you can't change it.
Roll onto the gas pedal less abruptly?
03-28-2017
#7
OF top 99.5% creator (Formerly of the Puffinblunts variety)
Re: quick jerk
My current '95 EX coupe does this.
The '97 (auto) and '98 (manual) EX coupes I've owned in the past five years did it as well.
Check the front lower (torque) mounts..they are probably shot. I filled one those mounts in with silicone caulk on the '97 and reduced the jerking but caused increased steering wheel and frame vibration.
"So, if you don't know,why are you wasting my time?"
OP: Ezone is one of the most knowledgeable mechanics you'll find on any Honda related forum sites.
The '97 (auto) and '98 (manual) EX coupes I've owned in the past five years did it as well.
Check the front lower (torque) mounts..they are probably shot. I filled one those mounts in with silicone caulk on the '97 and reduced the jerking but caused increased steering wheel and frame vibration.
"So, if you don't know,why are you wasting my time?"
OP: Ezone is one of the most knowledgeable mechanics you'll find on any Honda related forum sites.
