RPM slipping after car is warm? Help Plz! - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

s14zenki95 · 02-13-2008, 05:13 PM

I have a 95 s14..stock KA, recently got a 5spd swap. right now, when my car is at a cold start its perfectly fine, no slipping. Then after driving for about 15 mins or so (or when car is fully warm) my rpm starts slipping in 2nd gear and up. from 2000 rpm to about 3000 engine its revving but no power. what could the problem be? Dirty MAF? could it be clutch related or something with tranny?
I also changed my clutch line to steel braided recently, i didnt bleed the clutch fully, just took out all the air, could that be the problem?

Tune up is done already, wires, plugs, dist., etc.

Thanks!

LB.Motoring · 02-13-2008, 05:13 PM

Your clutch is dead?

DunG HAB SP · 02-13-2008, 05:17 PM

clutch master or slave leaking? were they new? when swap was done or brand used?

s14zenki95 · 02-13-2008, 05:26 PM

no nothing is leaking. the clutch master cylinder seems to be used but lines are new.

confused tho...at cold start...everything is perfectly fine. drives perfect. but after its warmed. then the slipping starts

EAT Motorsports · 02-13-2008, 05:30 PM

yeah sounds like your clutch is on its way out...

s14zenki95 · 02-13-2008, 05:34 PM

well i just finished talking to the place that did my swap..i told them that i recently changed my clutch line and he said that i should rebleed my system. make sure no air is in there. maybe its because i didnt bleed all the way the last time? he's experienced the same problem too. and as far as clutch going out.. i dont think so because he said i got a new one in there. maybe i should try readjusting the clutch pedal.
if im wrong please correct me. to adjust the pedal, the screw? or thing u adjust is behind the clutch pedal and do i turn that clockwise or counter?

EAT Motorsports · 02-13-2008, 05:47 PM

just wondering.... did you break in the clutch?? where is the engagement point currently at with your pedal?

DanDriftS13 · 02-13-2008, 05:49 PM

Turning the screw counter-clockwise would lower the point where the clutch pedal engages the clutch and turning it clockwise will raise it, I believe. Been a while since I've had to adjust mine but I'm about 95% sure that's the way it is. Should be pretty easy to tell for sure once you get under there and start to do it.

s14zenki95 · 02-13-2008, 05:51 PM

yes and the engagement point is currently very high. it was like that when i got it and its still like that right now. its at about 2/3

i wont be able to reply after this because i have work till 10.. thanks to every1 who replied and replies later giving me advice! THANKS again!

sileightyfreak · 02-13-2008, 05:53 PM

did u change out the clutch during the swap? considering it slips, would mean ur clutch is about to give.

DunG HAB SP · 02-13-2008, 05:55 PM

uhmm did you eliminate the clutch dampener? might just need to re bleed thats it

EAT Motorsports · 02-13-2008, 05:56 PM

2/3 sounds right... did you break in the clutch after the swap also did... also what brand of clutch did you use...

Pank · 02-13-2008, 06:04 PM

air in the line would make it so he cant engage the clutch, it would be stuck in gear. It sounds like your clutch is on the way out

EAT Motorsports · 02-13-2008, 06:13 PM

true true... it would burn the clutch up faster though if it is not fully disengaging...

M374llic4 · 02-13-2008, 08:15 PM

He said he got a new clutch : P

MR2NR · 02-13-2008, 08:27 PM

I had a similar problem with a 240 that came into the dealership and pretty much I put a new clutch master cylinder and slave cylinder and bleed it out real good and it took care of the problem. I thought it was the clutch going bad but one had been installed somewhere else. So maybe you can try bleeding it out cuz sometimes they are a pain to do so and get all the air out.

aznpoopy · 02-13-2008, 08:58 PM

Quote:

Originally Posted by Pank

air in the line would make it so he cant engage the clutch, it would be stuck in gear. It sounds like your clutch is on the way out

+1. clutch is clamped against flywheel by the pressure plate, not by hydraulic pressure. air in lines shouldn't cause slippage problems.

could be the clutch wasn't broken in properly
or maybe you got rear seal oil leak, getting oil on the clutch after a few minutes of operation?

well good luck

s14zenki95 · 02-13-2008, 10:13 PM

im pretty sure ive broken it in...ive had it since jan 28..thats about 3 weeks ago...this problem didnt start happening until i switched out the clutch line so im thinking i just have to rebleed it so ill do that tomorrow and let you guys know what happened, possibly air somewhere..and no i dont have a clutch dampner..didnt come with one (good thing) =]

LFOabuse · 02-13-2008, 10:17 PM

Did you change the rear main seal? If it's a new clutch it may be oil leaking from the rear main seal on the clutch disc causing it to slip.

EAT Motorsports · 02-13-2008, 11:56 PM

ah how many miles did you go in that 3 weeks?

Koopa Troopa · 02-14-2008, 01:46 AM

I'm guessing the clutch discs are worn and are showing their age as the engine gets hotter... My old twin would sing but as the temps went up the singing disappeared...

Addicted2Kouki · 02-14-2008, 11:06 AM

How about.... What brand Clutch and Pressure Plate is that?

Ive had bad experiences with an XTD clutch [ebay clutch] I bought to get around.

Sounds exactly like your situation.

It was worse than my worn out clutch, after 30 min it slipped like crazy.
I could literally leave it in gear and it wouldnt stall.

After ruling out other possibilities,
I ruled it down to
1. XTD makes shitty pressure plates
2. components in the clutch material sucks after heating
3. XTD just makes crap.
4. XTD makes the shittiest clutches ever.

That and XTD didnt uphold its warranty. assholes.

I hope if its the clutch, that you put it in yourself...
I put mine in myself.. both times.
When it was fucked, and when i realized XTD is fucked.

MadMaverick · 02-14-2008, 11:43 AM

Quote:

Originally Posted by aznpoopy

+1. clutch is clamped against flywheel by the pressure plate, not by hydraulic pressure. air in lines shouldn't cause slippage problems.

could be the clutch wasn't broken in properly
or maybe you got rear seal oil leak, getting oil on the clutch after a few minutes of operation?

well good luck

Quote:

Originally Posted by s14zenki95

im pretty sure ive broken it in...ive had it since jan 28..thats about 3 weeks ago...this problem didnt start happening until i switched out the clutch line so im thinking i just have to rebleed it so ill do that tomorrow and let you guys know what happened, possibly air somewhere..and no i dont have a clutch dampner..didnt come with one (good thing) =]

He just finished telling you air in the lines wont cause a slipping clutch....You can bleed it again, but I seriously doubt it will solve your problem.

If you clutch wasnt DISengaging, you would look towards hydraulic lines and cylinders. Since this is not your problem, look elsewhere. I would look towards something mechanical. You may have glazed the clutch, oil on fly/clutch, a broken/bad flywheel or even a problem in the trans itself. I would take it back to the place that did the swap.

02-13-2008, 05:13 PM	#1
s14zenki95 Join Date: Sep 2004 Location: West Covina Age: 38 Posts: 49 Trader Rating: (0) Feedback Score: 0 reviews	RPM slipping after car is warm? Help Plz! I have a 95 s14..stock KA, recently got a 5spd swap. right now, when my car is at a cold start its perfectly fine, no slipping. Then after driving for about 15 mins or so (or when car is fully warm) my rpm starts slipping in 2nd gear and up. from 2000 rpm to about 3000 engine its revving but no power. what could the problem be? Dirty MAF? could it be clutch related or something with tranny? I also changed my clutch line to steel braided recently, i didnt bleed the clutch fully, just took out all the air, could that be the problem? Tune up is done already, wires, plugs, dist., etc. Thanks! __________________

02-13-2008, 05:13 PM	#2
LB.Motoring Post Whore! Join Date: Jul 2006 Location: SòCal♥ Age: 38 Posts: 5,840 Trader Rating: (1) Rides Gallery: LB.Motoring Feedback Score: 1 reviews	Your clutch is dead? __________________ Robby Leuer

02-13-2008, 05:26 PM	#4
s14zenki95 Join Date: Sep 2004 Location: West Covina Age: 38 Posts: 49 Trader Rating: (0) Feedback Score: 0 reviews	no nothing is leaking. the clutch master cylinder seems to be used but lines are new. confused tho...at cold start...everything is perfectly fine. drives perfect. but after its warmed. then the slipping starts __________________

02-13-2008, 05:30 PM	#5
EAT Motorsports Zilvia Member Join Date: Oct 2007 Location: Kirkland, WA Age: 18 Posts: 242 Trader Rating: (5) Feedback Score: 5 reviews	yeah sounds like your clutch is on its way out... __________________

02-13-2008, 05:34 PM	#6
s14zenki95 Join Date: Sep 2004 Location: West Covina Age: 38 Posts: 49 Trader Rating: (0) Feedback Score: 0 reviews	well i just finished talking to the place that did my swap..i told them that i recently changed my clutch line and he said that i should rebleed my system. make sure no air is in there. maybe its because i didnt bleed all the way the last time? he's experienced the same problem too. and as far as clutch going out.. i dont think so because he said i got a new one in there. maybe i should try readjusting the clutch pedal. if im wrong please correct me. to adjust the pedal, the screw? or thing u adjust is behind the clutch pedal and do i turn that clockwise or counter? __________________

02-13-2008, 05:17 PM	#3
DunG HAB SP Join Date: Dec 2006 Location: NV Age: 47 Posts: 37 Trader Rating: (0) Feedback Score: 0 reviews	clutch master or slave leaking? were they new? when swap was done or brand used?

02-13-2008, 05:47 PM	#7
EAT Motorsports Zilvia Member Join Date: Oct 2007 Location: Kirkland, WA Age: 18 Posts: 242 Trader Rating: (5) Feedback Score: 5 reviews	just wondering.... did you break in the clutch?? where is the engagement point currently at with your pedal? __________________

02-13-2008, 05:49 PM	#8
DanDriftS13 Leaky Injector Join Date: Feb 2008 Location: Orlando, Fl Age: 37 Posts: 91 Trader Rating: (0) Feedback Score: 0 reviews	Turning the screw counter-clockwise would lower the point where the clutch pedal engages the clutch and turning it clockwise will raise it, I believe. Been a while since I've had to adjust mine but I'm about 95% sure that's the way it is. Should be pretty easy to tell for sure once you get under there and start to do it.

02-13-2008, 05:51 PM	#9
s14zenki95 Join Date: Sep 2004 Location: West Covina Age: 38 Posts: 49 Trader Rating: (0) Feedback Score: 0 reviews	yes and the engagement point is currently very high. it was like that when i got it and its still like that right now. its at about 2/3 i wont be able to reply after this because i have work till 10.. thanks to every1 who replied and replies later giving me advice! THANKS again! __________________

02-13-2008, 05:53 PM	#10
sileightyfreak Zilvia FREAK! Join Date: Nov 2007 Location: LBC Age: 38 Posts: 1,385 Trader Rating: (10) Feedback Score: 10 reviews	did u change out the clutch during the swap? considering it slips, would mean ur clutch is about to give. __________________

02-13-2008, 05:55 PM	#11
DunG HAB SP Join Date: Dec 2006 Location: NV Age: 47 Posts: 37 Trader Rating: (0) Feedback Score: 0 reviews	uhmm did you eliminate the clutch dampener? might just need to re bleed thats it

02-13-2008, 05:56 PM	#12
EAT Motorsports Zilvia Member Join Date: Oct 2007 Location: Kirkland, WA Age: 18 Posts: 242 Trader Rating: (5) Feedback Score: 5 reviews	2/3 sounds right... did you break in the clutch after the swap also did... also what brand of clutch did you use... __________________ Last edited by EAT Motorsports; 02-13-2008 at 09:41 PM..

02-13-2008, 06:04 PM	#13
Pank Post Whore! Join Date: Oct 2004 Location: Charlotte, NC Age: 42 Posts: 3,627 Trader Rating: (0) Feedback Score: 0 reviews	air in the line would make it so he cant engage the clutch, it would be stuck in gear. It sounds like your clutch is on the way out __________________ high performance driveway photography zenki s14---v8 fc rx7 my crappy flickr page (drift cars whoo)

02-13-2008, 06:13 PM	#14
EAT Motorsports Zilvia Member Join Date: Oct 2007 Location: Kirkland, WA Age: 18 Posts: 242 Trader Rating: (5) Feedback Score: 5 reviews	true true... it would burn the clutch up faster though if it is not fully disengaging... __________________

02-13-2008, 08:15 PM	#15
M374llic4 Leaky Injector Join Date: Apr 2006 Location: Tampa Posts: 87 Trader Rating: (0) Feedback Score: 0 reviews	He said he got a new clutch : P __________________

02-13-2008, 08:27 PM	#16
MR2NR Join Date: Dec 2005 Location: Maryland Age: 38 Posts: 9 Trader Rating: (0) Feedback Score: 0 reviews	I had a similar problem with a 240 that came into the dealership and pretty much I put a new clutch master cylinder and slave cylinder and bleed it out real good and it took care of the problem. I thought it was the clutch going bad but one had been installed somewhere else. So maybe you can try bleeding it out cuz sometimes they are a pain to do so and get all the air out.

02-13-2008, 10:13 PM	#18
s14zenki95 Join Date: Sep 2004 Location: West Covina Age: 38 Posts: 49 Trader Rating: (0) Feedback Score: 0 reviews	im pretty sure ive broken it in...ive had it since jan 28..thats about 3 weeks ago...this problem didnt start happening until i switched out the clutch line so im thinking i just have to rebleed it so ill do that tomorrow and let you guys know what happened, possibly air somewhere..and no i dont have a clutch dampner..didnt come with one (good thing) =] __________________

02-13-2008, 10:17 PM	#19
LFOabuse Leaky Injector Join Date: Nov 2006 Location: Los Angeles Posts: 74 Trader Rating: (4) Feedback Score: 4 reviews	Did you change the rear main seal? If it's a new clutch it may be oil leaking from the rear main seal on the clutch disc causing it to slip. __________________ ...

02-13-2008, 11:56 PM	#20
EAT Motorsports Zilvia Member Join Date: Oct 2007 Location: Kirkland, WA Age: 18 Posts: 242 Trader Rating: (5) Feedback Score: 5 reviews	ah how many miles did you go in that 3 weeks? __________________

02-14-2008, 01:46 AM	#21
Koopa Troopa Post Whore! Join Date: Sep 2006 Location: 北谷著, 沖縄県、日本 Posts: 2,565 Trader Rating: (3) Feedback Score: 3 reviews	I'm guessing the clutch discs are worn and are showing their age as the engine gets hotter... My old twin would sing but as the temps went up the singing disappeared... __________________ Buy my Stillway shifter!