Im About To Give Up!! Please Help - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

lilskyline240 · 07-27-2007, 05:59 PM

i bought my 90 coupe with a 93 ka24de in it just to mess around with as a fun car. not my daily driver. Well since ive had it the car has had one main problem. As you drive in any gear it pulls nicely up to about 3200rpm then just falls flat on its face and has NO POWER at all. Still revs, but makes a ton of noise and goes nowhere. Also the car will not idle lower than like 1200 even with the idle screw all the way in!! also coming to a stop it will almost die unless i blip the trottle, then the idle comes up to 1200 again. I have since changed/replaced/checked these things
changed maf
changed ecu
No ecu codes
changed plugs
changed wires
changed cap
changed rotor
91 DOHC cams
new upper chain
fuel filter
fuel pump
injectors
Timed at 20 degrees
the only thing i have left i could possibly think it could be is a HUGE air leak, my CAS, or knock sensor or lower timing chain?.....idk how it could be my CAS or knock sensor cuz im not gettin any codes for them. what it feels like to drive is pulls hard to 3200 then feels like someone just backed out like 20 degrees of timing!!!
i am about to buy a new motor, but i dont think this one is bad!! compression is good still 170 across the board
SOMEONE HELP PLZ!!!

drftlv · 07-27-2007, 06:14 PM

have you tried sprayin intake cleaner in it... that might work my friends did sorta the same till we sprayed intake cleaner in it then it ran alrite again... hope that works for you...

skylindrftr · 07-27-2007, 06:28 PM

I am pretty sure the car is supposed to be at 15 degrees of timing stock, that's what the smog man told me. 20 degrees will give you more tq but the car will not have as much top end so I've been told. It shouldn't be as bad as you described though. Could your clutch possibly be slipping badly?

lilskyline240 · 07-27-2007, 06:31 PM

maybe its set at 15 degrees. w/e the last notch on the right side on the crank pulley is. Clutch is a ACT stage 3 and is not slipping, its just the car has NO power. like backing out 30 degrees timing at 3200rpm is what it feels like!!!

Flybert · 07-27-2007, 06:50 PM

Mechanical timing is most likely off. Set it to TDC and check the cam alignment with some of the pics of TDC on here. I just had to deal with this BS on a friends SR that we got from rndfactory. Felt fine down low with 0 power up top. Thought since it was a fresh motorset from japan that the mechanical timing had to be fine so we checked everything else like you did. Finally checked the cam timing and it was off.

lilskyline240 · 07-27-2007, 07:18 PM

Quote:

Originally Posted by Flybert

Mechanical timing is most likely off. Set it to TDC and check the cam alignment with some of the pics of TDC on here. I just had to deal with this BS on a friends SR that we got from rndfactory. Felt fine down low with 0 power up top. Thought since it was a fresh motorset from japan that the mechanical timing had to be fine so we checked everything else like you did. Finally checked the cam timing and it was off.

when i put the motor at TDC according to the crank pully timing marks, the cam timing seems right on.

skylindrftr · 07-28-2007, 01:34 AM

oops didnt read, thought this was a ka24de, ignore my timing comment

all stock · 07-28-2007, 05:50 AM

ka24de is supposed to be at 20 degrees. sr is 15 i believe.

nissandr1ft · 07-28-2007, 07:41 AM

Yes, the timing is set at 20 degrees btdc on the DOHC. You may also want to check for intake leaks with some carb spray since your idles jacked a bit. Id agree on the checking the mechanical timing, one cam could be off a tooth and still run.

2plus4plus0eq6 · 07-28-2007, 10:23 AM

3200 and not pulling? you driving with an elephant in the back or something? maybe its just because the ka sucks balls

check timing, vacuum lines and maf sensor

if you want to lower the idle then check in the fsm. there is a certain procedure used for doing it. not sure if that is what you did already. Not sure about the ka, but the sr has +50 added on to the idle i think

all stock · 07-29-2007, 05:03 AM

vacuum i bet.

07-27-2007, 05:59 PM	#1
lilskyline240 Zilvia Member Join Date: Aug 2006 Location: Oconomowoc Age: 37 Posts: 196 Trader Rating: (0) Rides Gallery: lilskyline240 Feedback Score: 0 reviews	Im About To Give Up!! Please Help i bought my 90 coupe with a 93 ka24de in it just to mess around with as a fun car. not my daily driver. Well since ive had it the car has had one main problem. As you drive in any gear it pulls nicely up to about 3200rpm then just falls flat on its face and has NO POWER at all. Still revs, but makes a ton of noise and goes nowhere. Also the car will not idle lower than like 1200 even with the idle screw all the way in!! also coming to a stop it will almost die unless i blip the trottle, then the idle comes up to 1200 again. I have since changed/replaced/checked these things changed maf changed ecu No ecu codes changed plugs changed wires changed cap changed rotor 91 DOHC cams new upper chain fuel filter fuel pump injectors Timed at 20 degrees the only thing i have left i could possibly think it could be is a HUGE air leak, my CAS, or knock sensor or lower timing chain?.....idk how it could be my CAS or knock sensor cuz im not gettin any codes for them. what it feels like to drive is pulls hard to 3200 then feels like someone just backed out like 20 degrees of timing!!! i am about to buy a new motor, but i dont think this one is bad!! compression is good still 170 across the board SOMEONE HELP PLZ!!!

07-27-2007, 06:14 PM	#2
drftlv Join Date: Apr 2007 Location: Fayetteville Age: 40 Posts: 5 Trader Rating: (0) Feedback Score: 0 reviews	maybe some intake cleaner... have you tried sprayin intake cleaner in it... that might work my friends did sorta the same till we sprayed intake cleaner in it then it ran alrite again... hope that works for you... Last edited by drftlv; 07-27-2007 at 06:15 PM.. Reason: changed spelling... added text

07-28-2007, 07:41 AM	#9
nissandr1ft Zilvia Member Join Date: Sep 2004 Location: Clayton, NC Age: 41 Posts: 284 Trader Rating: (0) Feedback Score: 0 reviews	Yes, the timing is set at 20 degrees btdc on the DOHC. You may also want to check for intake leaks with some carb spray since your idles jacked a bit. Id agree on the checking the mechanical timing, one cam could be off a tooth and still run. __________________ ------------------------- www.carolinanissans.com -------------------------

07-28-2007, 10:23 AM	#10
2plus4plus0eq6 Zilvia Junkie Join Date: Oct 2005 Location: Canada, BC Posts: 390 Trader Rating: (0) Feedback Score: 0 reviews	3200 and not pulling? you driving with an elephant in the back or something? maybe its just because the ka sucks balls check timing, vacuum lines and maf sensor if you want to lower the idle then check in the fsm. there is a certain procedure used for doing it. not sure if that is what you did already. Not sure about the ka, but the sr has +50 added on to the idle i think __________________

07-27-2007, 06:28 PM	#3
skylindrftr Zilvia FREAK! Join Date: Apr 2007 Location: Metro Detroit Age: 36 Posts: 1,099 Trader Rating: (26) Feedback Score: 26 reviews	I am pretty sure the car is supposed to be at 15 degrees of timing stock, that's what the smog man told me. 20 degrees will give you more tq but the car will not have as much top end so I've been told. It shouldn't be as bad as you described though. Could your clutch possibly be slipping badly?

07-27-2007, 06:31 PM	#4
lilskyline240 Zilvia Member Join Date: Aug 2006 Location: Oconomowoc Age: 37 Posts: 196 Trader Rating: (0) Rides Gallery: lilskyline240 Feedback Score: 0 reviews	maybe its set at 15 degrees. w/e the last notch on the right side on the crank pulley is. Clutch is a ACT stage 3 and is not slipping, its just the car has NO power. like backing out 30 degrees timing at 3200rpm is what it feels like!!!

07-27-2007, 06:50 PM	#5
Flybert Post Whore! Join Date: Mar 2003 Location: none Posts: 3,862 Trader Rating: (7) Feedback Score: 7 reviews	Mechanical timing is most likely off. Set it to TDC and check the cam alignment with some of the pics of TDC on here. I just had to deal with this BS on a friends SR that we got from rndfactory. Felt fine down low with 0 power up top. Thought since it was a fresh motorset from japan that the mechanical timing had to be fine so we checked everything else like you did. Finally checked the cam timing and it was off.

07-28-2007, 01:34 AM	#7
skylindrftr Zilvia FREAK! Join Date: Apr 2007 Location: Metro Detroit Age: 36 Posts: 1,099 Trader Rating: (26) Feedback Score: 26 reviews	oops didnt read, thought this was a ka24de, ignore my timing comment

07-28-2007, 05:50 AM	#8
all stock Zilvia Junkie Join Date: Oct 2003 Location: Irvine Posts: 312 Trader Rating: (0) Feedback Score: 0 reviews	ka24de is supposed to be at 20 degrees. sr is 15 i believe.

07-29-2007, 05:03 AM	#11
all stock Zilvia Junkie Join Date: Oct 2003 Location: Irvine Posts: 312 Trader Rating: (0) Feedback Score: 0 reviews	vacuum i bet.