90 240sx AUTO sohc RPM PROblem - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

khmer1 · 08-28-2008, 10:55 AM

need help to figure out the problem this is driving around for 30 mins or so on the highway at around 60mph anyways here the problem when my rpm drops down to about 1k it goes back up a slight bit to maybe 1.3k and i don't even have to press the gas or anything it also seems like it doing a brake jerk also with out me not even pressing on the brake ever time i let go of the gas at a higher rpm and it does it until i come to a complete stop

it hard to explain i think but i'll try to get more info on it if anyone doesn't understand what im saying

uh it like a brake jerk(slows down faster?) when it get to the 1k around some say it could be the tps sensor, IACV or ACC,egr valve,vaccum hoses,engine grounds,ecu ground got damn what is it?

i could try to make more vid of it if you need a longer version

here a video mute the sound i think it messed up(sorry bout the quality and sound recorded from a cell phone)
p.s as soon as the video starts i let go of the gas and it rolling by itself until the end
YouTube - s13 240sx auto sohc rpm problem

1slowS13 · 08-28-2008, 10:59 AM

high idle can be because of vaccum leaks, bad harness grounds, a dirty iacv, etc

with the braking problem, it comes to a complete stop on its own? what happens if you leave the car on drive, but not pressing on the accelerator? can you feel the brakes holding the car?

khmer1 · 08-28-2008, 02:21 PM

i'll check those things as soon as it stop raining but on the braking it more of like how you keep downshifting to all the gears to fast and it give that slow down motion haha damn this hard to explain but i'll try or it like everytime it hits 1k feels it like some one is tapping/stepping on the brakes

khmer1 · 08-31-2008, 10:10 PM

dang ima try to seafoam it and see what happeneds

Bigsyke · 09-01-2008, 02:47 PM

get your tranny flushed, and add about 8 ounces of lubegard red.

Change the trans filter too.

Could be the tps.

08-28-2008, 10:55 AM	#1
khmer1 Zilvia Junkie Join Date: Feb 2008 Location: living in Columbus OH, hometown MARYLAND Posts: 418 Trader Rating: (1) Feedback Score: 1 reviews	90 240sx AUTO sohc RPM PROblem need help to figure out the problem this is driving around for 30 mins or so on the highway at around 60mph anyways here the problem when my rpm drops down to about 1k it goes back up a slight bit to maybe 1.3k and i don't even have to press the gas or anything it also seems like it doing a brake jerk also with out me not even pressing on the brake ever time i let go of the gas at a higher rpm and it does it until i come to a complete stop it hard to explain i think but i'll try to get more info on it if anyone doesn't understand what im saying uh it like a brake jerk(slows down faster?) when it get to the 1k around some say it could be the tps sensor, IACV or ACC,egr valve,vaccum hoses,engine grounds,ecu ground got damn what is it? i could try to make more vid of it if you need a longer version here a video mute the sound i think it messed up(sorry bout the quality and sound recorded from a cell phone) p.s as soon as the video starts i let go of the gas and it rolling by itself until the end YouTube - s13 240sx auto sohc rpm problem

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08-28-2008, 10:59 AM	#2
1slowS13 Zilvia Junkie Join Date: Jan 2008 Location: Las Vegas, NV Age: 32 Posts: 466 Trader Rating: (6) Feedback Score: 6 reviews	high idle can be because of vaccum leaks, bad harness grounds, a dirty iacv, etc with the braking problem, it comes to a complete stop on its own? what happens if you leave the car on drive, but not pressing on the accelerator? can you feel the brakes holding the car?

08-28-2008, 02:21 PM	#3
khmer1 Zilvia Junkie Join Date: Feb 2008 Location: living in Columbus OH, hometown MARYLAND Posts: 418 Trader Rating: (1) Feedback Score: 1 reviews	i'll check those things as soon as it stop raining but on the braking it more of like how you keep downshifting to all the gears to fast and it give that slow down motion haha damn this hard to explain but i'll try or it like everytime it hits 1k feels it like some one is tapping/stepping on the brakes

08-31-2008, 10:10 PM	#4
khmer1 Zilvia Junkie Join Date: Feb 2008 Location: living in Columbus OH, hometown MARYLAND Posts: 418 Trader Rating: (1) Feedback Score: 1 reviews	dang ima try to seafoam it and see what happeneds

09-01-2008, 02:47 PM	#5
Bigsyke Zilvia FREAK! Join Date: Jun 2008 Location: NA Age: 36 Posts: 1,342 Trader Rating: (0) Feedback Score: 0 reviews	get your tranny flushed, and add about 8 ounces of lubegard red. Change the trans filter too. Could be the tps.