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Jerking on decel below 3k rpms?

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Old 03-03-05, 02:07 PM
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Cheese

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Jerking on decel below 3k rpms?

Recently my car started jerking a bit when Im decelerating and it gets below roughly 3k rpms. I can hear what sounds like the motor rocking in its mounts when it does it, but it stops totally when I give it just a little bit of gas. Anyone have this happen to them before?
Old 03-03-05, 02:14 PM
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yeah I have it happen in 5th gear... if i shift at 40 mph or lower. would like to know what's happening ;p
Old 03-03-05, 02:52 PM
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Do you have your foot totally off the gas, or partially on the gas?

Dale
Old 03-03-05, 03:28 PM
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I have this problem too with bad jerking when my foot is completely off the gas and slowing/coasting while in gear
Old 03-03-05, 03:32 PM
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TPS

your fuel is not cutting off properly, this suggests your ECU thinks your foot is still on the gas a bit
Old 03-03-05, 03:44 PM
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how would you go about fixing it? mine sometimes chugs when i'm on the accel too in 5th..
Old 03-03-05, 03:59 PM
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recalibrate your TPS
Old 03-03-05, 04:25 PM
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^^ how do you do that?
Old 03-03-05, 05:49 PM
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Originally Posted by boostgasm
TPS

your fuel is not cutting off properly, this suggests your ECU thinks your foot is still on the gas a bit
This makes sense, Ive had problems with my TPS before, thanks.
Old 03-03-05, 05:58 PM
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Originally Posted by montego
^^ how do you do that?
https://www.rx7club.com/3rd-generation-specific-1993-2002-16/fixed-my-idle-problems-backfiring-bucking-more-170731/
Old 03-03-05, 06:03 PM
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if it aint the tps check your grounds and possibly install a hyperground kit. I had that sae problem but promptly fixed it wit a $15 ground it off eBay.
Old 03-03-05, 10:28 PM
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dont look past a faulty clutch either the clutch was going out in my car and it bucked just like you explain....my engine was fine!
Old 03-03-05, 10:51 PM
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Most likely the narrow range TPS....BTW, doesn't anyone use their service manual anymore?
Old 03-03-05, 11:42 PM
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Service WHO? never heard of her.

When my TPS was bad, I had the same problem. I guess Ill just beat a dead dog and reiterate whats been said.
Old 03-04-05, 10:43 AM
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Thanks!
Old 03-04-05, 10:52 AM
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The motor rocking in it's motor mounts? Are you sure its not a bucking and not a jerking? When I had my TPS problem before I got my PFC, everytime around 2700-3200 I'd feel a fat *** lag or loss of power. Kinda like a "jerking" like what you said. But rocking in it's motor mounts... I've never felt anything like that before. Maybe you mean bucking?

Jeremy
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