sr20det problem - no power from 3-5k rpm - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

dasalnt · 02-12-2006, 11:20 PM

I've recently started having a problem with my redtop sr20det. When it first started, the car would drive fine until around 3k rpm and then it would feel like it wasn't gaining anymore power but my boost would continue to go up to 7lbs. I just changed out my spark plugs today and it helped a little bit. Instead of not feeling a power increase after 3k rpm, i dont feel any power increase after 3k rpm but once it reaches around 5k rpm i can feel the power come on again. Hopefully someone has experienced a problem like this before. If anyone lives in the la/oc area and is willing to help diagnose/fix the problem i would also be willing to pay, thanks!

dasalnt · 02-13-2006, 08:08 PM

hopefully someone can chime in and help out!

xeros · 02-13-2006, 09:02 PM

Sounds like a vacuum hose problem. Maybe even a sensor? But it definitely sounds like a vacuum hose leak some where. That or a coupler came loose. Did you hear nay odd noises fromunder the hood? Like an unusually loud swooshing sound?

SR20d2fourT · 02-16-2006, 12:52 AM

vacuum, boost leaks, crap ass coil packs....my car was exactly the same way. It would loose around 3k and get back at around 5k...deja vu! haha well yea those were the problems...

dasalnt · 02-16-2006, 09:40 AM

i'll definitely go thru the leaks again, i've checked and tightened down all the clamps but i'll check again. I haven't checked the coil packs so i'll have to find a faq on how to do it. Thanks

spdfreek0o · 02-16-2006, 10:40 AM

kinda thread stealing... but, my friend works at a dealership and someone brought in a turbo pt cruiser. It kinda has the same problem, turbo spools fine but no power. The boost gauge is also reading an insane amount of boost(24psi) for an OEM turbo. I was thinking boost leak but would a boost leak cause a boost gauge to read inaccurate? Any one got any ideas?

jalam321 · 02-20-2006, 05:58 PM

i have a similiar problem also. Mine hesitates a little between 2000-3000 rpm. I'm not sure what the problem is either.

daryl337 · 02-21-2006, 01:33 AM

CAS maybe? Sometimes they crap out at higher rpm's.

Slip&Sliden 240 · 02-21-2006, 02:25 AM

Did you check for codes yet? My buddies sr was running crappy.We checked codes, and got a knock sensor code. We swapped it with my spare SR and it runs like a champ now.

02-12-2006, 11:20 PM	#1
dasalnt Leaky Injector Join Date: Jul 2003 Location: socal Posts: 122 Trader Rating: (0) Feedback Score: 0 reviews	sr20det problem - no power from 3-5k rpm I've recently started having a problem with my redtop sr20det. When it first started, the car would drive fine until around 3k rpm and then it would feel like it wasn't gaining anymore power but my boost would continue to go up to 7lbs. I just changed out my spark plugs today and it helped a little bit. Instead of not feeling a power increase after 3k rpm, i dont feel any power increase after 3k rpm but once it reaches around 5k rpm i can feel the power come on again. Hopefully someone has experienced a problem like this before. If anyone lives in the la/oc area and is willing to help diagnose/fix the problem i would also be willing to pay, thanks!

02-13-2006, 08:08 PM	#2
dasalnt Leaky Injector Join Date: Jul 2003 Location: socal Posts: 122 Trader Rating: (0) Feedback Score: 0 reviews	hopefully someone can chime in and help out!

02-13-2006, 09:02 PM	#3
xeros Join Date: Nov 2005 Location: Milwaukee, Wisconsin Posts: 31 Trader Rating: (0) Feedback Score: 0 reviews	Sounds like a vacuum hose problem. Maybe even a sensor? But it definitely sounds like a vacuum hose leak some where. That or a coupler came loose. Did you hear nay odd noises fromunder the hood? Like an unusually loud swooshing sound?

02-16-2006, 12:52 AM	#4
SR20d2fourT Zilvia Junkie Join Date: Aug 2005 Location: Earth Age: 38 Posts: 403 Trader Rating: (0) Feedback Score: 0 reviews	vacuum, boost leaks, crap ass coil packs....my car was exactly the same way. It would loose around 3k and get back at around 5k...deja vu! haha well yea those were the problems...

02-16-2006, 09:40 AM	#5
dasalnt Leaky Injector Join Date: Jul 2003 Location: socal Posts: 122 Trader Rating: (0) Feedback Score: 0 reviews	i'll definitely go thru the leaks again, i've checked and tightened down all the clamps but i'll check again. I haven't checked the coil packs so i'll have to find a faq on how to do it. Thanks

02-16-2006, 10:40 AM	#6
spdfreek0o Zilvia Member Join Date: Mar 2005 Location: Oklahoma Posts: 280 Trader Rating: (0) Feedback Score: 0 reviews	kinda thread stealing... but, my friend works at a dealership and someone brought in a turbo pt cruiser. It kinda has the same problem, turbo spools fine but no power. The boost gauge is also reading an insane amount of boost(24psi) for an OEM turbo. I was thinking boost leak but would a boost leak cause a boost gauge to read inaccurate? Any one got any ideas?

02-20-2006, 05:58 PM	#7
jalam321 Join Date: Dec 2005 Location: Houston, tx Posts: 24 Trader Rating: (0) Feedback Score: 0 reviews	i have a similiar problem also. Mine hesitates a little between 2000-3000 rpm. I'm not sure what the problem is either.

02-21-2006, 01:33 AM	#8
daryl337 Zilvia Junkie Join Date: Aug 2005 Location: Pac NW Age: 39 Posts: 589 Trader Rating: (1) Feedback Score: 1 reviews	CAS maybe? Sometimes they crap out at higher rpm's.

02-21-2006, 02:25 AM	#9
Slip&Sliden 240 Zilvia Member Join Date: May 2004 Location: Washington Age: 38 Posts: 237 Trader Rating: (1) Feedback Score: 1 reviews	Did you check for codes yet? My buddies sr was running crappy.We checked codes, and got a knock sensor code. We swapped it with my spare SR and it runs like a champ now.