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View Full Version : RPM slipping after car is warm? Help Plz!


s14zenki95
02-13-2008, 06:13 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, 06:13 PM
Your clutch is dead?

DunG HAB SP
02-13-2008, 06:17 PM
clutch master or slave leaking? were they new? when swap was done or brand used?

s14zenki95
02-13-2008, 06:26 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, 06:30 PM
yeah sounds like your clutch is on its way out...

s14zenki95
02-13-2008, 06:34 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, 06:47 PM
just wondering.... did you break in the clutch?? where is the engagement point currently at with your pedal?

DanDriftS13
02-13-2008, 06:49 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, 06:51 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, 06:53 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, 06:55 PM
uhmm did you eliminate the clutch dampener? might just need to re bleed thats it

EAT Motorsports
02-13-2008, 06:56 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, 07:04 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, 07:13 PM
true true... it would burn the clutch up faster though if it is not fully disengaging...

M374llic4
02-13-2008, 09:15 PM
He said he got a new clutch : P

MR2NR
02-13-2008, 09:27 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, 09:58 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

+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, 11:13 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, 11:17 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
02-14-2008, 12:56 AM
ah how many miles did you go in that 3 weeks?

Koopa Troopa
02-14-2008, 02:46 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, 12:06 PM
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, 12:43 PM
+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

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.