CA18 wont rev at all ???? - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

sdtouge · 04-19-2005, 09:31 PM

so i got my car to finally idle ok, but not untill i reach normal operationg temperatures (NOT). i have no idea what this is, or why.

whether its in gear, or in idle, the car will not rev up at all. when i step on the throttle it might move 100 rpm up at hte most.

someone from 240sxforums.com suggested a HUGE vacuum leak but other people suggest that wold keep it from moving rpms at all, and i also noticed my boost gauge is at -3 psi (3 psi of vacuum) when its cold and im trying to keep it alive. i also have no power brakes.

here is my vacuum setup:
wastegate - cold pipe
breather part -intake
another breather type thing-back of throttle body
back of throttle body-brake booster
aicv stuff. under mani-tees to coldpipe, then goes to the air regulaotr and into the mani again.
4 under the side of inake mani/throttle body-teed off
2 under throttle body- teed together (towards the front)
1 smaller one behind throttle body area (near brake booster line) goes to fpr, butterfly, and boost gauge.
1 more behind throttle body teed off.
then the one vacuum line that gets teed off when you swap to sr t25-teed off

thats it i beleive. let me know, i followed what needs to go where from this site, if its wrong i do not know it...

so any ideas would be great.

POST UP PEOPLE!!! please i need some help.

sdtouge · 04-24-2005, 02:55 PM

ok heres an update. i just copied and pasted from another forum.

ok, i got it to rev up, it seems like when i pinch the fpr vacuum line a little bit, then i let it go normal, then go inside and rev it, it will go, it takes like 20 seconds at wot to get to like 22, then it starts to build boost, then it hits like 3500 and goes fast so i just take my foot off the petal.
another thing, when i disconect some of the aicv vacuum lines it idles the smae, im thinking that could be my problem or my fpr is bad. oh my idle is still at like 3psi of vacuum...

EDIT: ok i dont think its when i pinch my libne to my fpr, its more when it just warms up more.

also, i defianantly had my intake peice wrong because the line for the breathere just got torched against the heat shield.

um, there is hesitation at around 1900 rpm and an acoupe kinda "bangs" i think its a back fire.... up also kinda alot of white smoke, well not that mcuh but i think my turbo is burngin oil

also, i know my ecu is ok, i had everytihng pluged in, then i unpluged the know sensor, turned the engine on for a couple seconds, turned it off and sure enough code 34... so its not anything electrical thats wrong...

ok thats jujst a quick little update. thanks!

oh i am noosting at 9 pounds at about 4500 rpms, just wanted to add that in, thats with open filter, 2.5 dp, and a fat leak betwwen dp and cat.

ok cool and please keep the sugegstions coming!

04-19-2005, 09:31 PM	#1
sdtouge BANNED Join Date: Dec 2004 Location: san diego Posts: 479 Trader Rating: (0) Feedback Score: 0 reviews	CA18 wont rev at all ???? so i got my car to finally idle ok, but not untill i reach normal operationg temperatures (NOT). i have no idea what this is, or why. whether its in gear, or in idle, the car will not rev up at all. when i step on the throttle it might move 100 rpm up at hte most. someone from 240sxforums.com suggested a HUGE vacuum leak but other people suggest that wold keep it from moving rpms at all, and i also noticed my boost gauge is at -3 psi (3 psi of vacuum) when its cold and im trying to keep it alive. i also have no power brakes. here is my vacuum setup: wastegate - cold pipe breather part -intake another breather type thing-back of throttle body back of throttle body-brake booster aicv stuff. under mani-tees to coldpipe, then goes to the air regulaotr and into the mani again. 4 under the side of inake mani/throttle body-teed off 2 under throttle body- teed together (towards the front) 1 smaller one behind throttle body area (near brake booster line) goes to fpr, butterfly, and boost gauge. 1 more behind throttle body teed off. then the one vacuum line that gets teed off when you swap to sr t25-teed off thats it i beleive. let me know, i followed what needs to go where from this site, if its wrong i do not know it... so any ideas would be great. POST UP PEOPLE!!! please i need some help.

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04-24-2005, 02:55 PM	#2
sdtouge BANNED Join Date: Dec 2004 Location: san diego Posts: 479 Trader Rating: (0) Feedback Score: 0 reviews	ok heres an update. i just copied and pasted from another forum. ok, i got it to rev up, it seems like when i pinch the fpr vacuum line a little bit, then i let it go normal, then go inside and rev it, it will go, it takes like 20 seconds at wot to get to like 22, then it starts to build boost, then it hits like 3500 and goes fast so i just take my foot off the petal. another thing, when i disconect some of the aicv vacuum lines it idles the smae, im thinking that could be my problem or my fpr is bad. oh my idle is still at like 3psi of vacuum... EDIT: ok i dont think its when i pinch my libne to my fpr, its more when it just warms up more. also, i defianantly had my intake peice wrong because the line for the breathere just got torched against the heat shield. um, there is hesitation at around 1900 rpm and an acoupe kinda "bangs" i think its a back fire.... up also kinda alot of white smoke, well not that mcuh but i think my turbo is burngin oil also, i know my ecu is ok, i had everytihng pluged in, then i unpluged the know sensor, turned the engine on for a couple seconds, turned it off and sure enough code 34... so its not anything electrical thats wrong... ok thats jujst a quick little update. thanks! oh i am noosting at 9 pounds at about 4500 rpms, just wanted to add that in, thats with open filter, 2.5 dp, and a fat leak betwwen dp and cat. ok cool and please keep the sugegstions coming!