SR20det (red top) won't rev past 3k RPM. Help! - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

TOMKAIRA93 · 10-10-2007, 10:00 PM

Hey guys,
After a year of having my car stored in the garage, my father and brother in law have helped me tie loosed ends with my project. We finally got it to where is driveable, menaing everything is in place...or at least it seemed like it. Well, I took it for a test drive about 2 hours ago and the car won't go past 3k rpm. The car idles steady at 0.9 RPM and doesn't leak any air, otherwise it wouldn't be smooth at idling. It also spools fine when revved up in the garage. I've tried searching for similar problems but haven't had any luck.
Again, I've had this project for a year now and I think is close to being done, I just need this little problem to be taken care of. I would really appreciate if anyone that has had this problem before help a fellow zilvian in need.

Thanks!

S13Leprechaun · 10-10-2007, 10:02 PM

when you rev in it still wont go past 3k or is it just when youre driving?

TOMKAIRA93 · 10-10-2007, 10:13 PM

when you're driving it only. In the garage, it rev's up like a champ. weird!!!

jspek · 10-11-2007, 12:54 AM

did you check the ecu for any codes?

cotbu · 10-11-2007, 05:15 AM

Quote:

The car idles steady at 0.9 RPM and doesn't leak any air, otherwise it wouldn't be smooth at idling.

This type of thinking, may cause you to overlook the boost leak you have. I did have a problem like this. code 55, Idled fine, revved fine, but bucked when given any kind of throttle while driving and smoked. first thought I blew the head gasket, compression was great. Then I thought MAFS, cause it eventually wouldn't rev past 2500rpm. But it was a boostleak. Meaning vacuum was good but boost leaked. Is there any smoke while driving?

water · 10-11-2007, 06:46 AM

Check over ignition and pressure test for boost leaks.

TOMKAIRA93 · 10-11-2007, 07:09 AM

I will start with the BOV for leaks. Since it was night, I couldn't tell if there was any smoke or not. I will check today and report back. Thanks!

statik · 10-11-2007, 07:26 AM

Try adjusting the TPS as well. If you dont have an SR FSM, PM me.

TOMKAIRA93 · 10-12-2007, 07:49 AM

Yesterday I checked for leaks and found one down in the intercooler area. Fixed it and the car runs a lot better but now it craps out on me at 4k rpm. I can shift fine, but if I rev it up pass 4k, it will start crapping out again. I suspect another boost leak around the hot pipe, it needs some welding. Hopefully this will fix the problem. But if it doesn't, what else?

10-10-2007, 10:00 PM	#1
TOMKAIRA93 Zilvia Addict Join Date: Dec 2005 Location: San Antonio, TX Age: 47 Posts: 696 Trader Rating: (3) Feedback Score: 3 reviews	SR20det (red top) won't rev past 3k RPM. Help! Hey guys, After a year of having my car stored in the garage, my father and brother in law have helped me tie loosed ends with my project. We finally got it to where is driveable, menaing everything is in place...or at least it seemed like it. Well, I took it for a test drive about 2 hours ago and the car won't go past 3k rpm. The car idles steady at 0.9 RPM and doesn't leak any air, otherwise it wouldn't be smooth at idling. It also spools fine when revved up in the garage. I've tried searching for similar problems but haven't had any luck. Again, I've had this project for a year now and I think is close to being done, I just need this little problem to be taken care of. I would really appreciate if anyone that has had this problem before help a fellow zilvian in need. Thanks! __________________

10-10-2007, 10:02 PM	#2
S13Leprechaun Zilvia FREAK! Join Date: Jan 2007 Location: 1904 Posts: 1,110 Trader Rating: (0) Feedback Score: 0 reviews	when you rev in it still wont go past 3k or is it just when youre driving? __________________ *thurs. knights.*

10-10-2007, 10:13 PM	#3
TOMKAIRA93 Zilvia Addict Join Date: Dec 2005 Location: San Antonio, TX Age: 47 Posts: 696 Trader Rating: (3) Feedback Score: 3 reviews	when you're driving it only. In the garage, it rev's up like a champ. weird!!! __________________

10-11-2007, 07:09 AM	#7
TOMKAIRA93 Zilvia Addict Join Date: Dec 2005 Location: San Antonio, TX Age: 47 Posts: 696 Trader Rating: (3) Feedback Score: 3 reviews	I will start with the BOV for leaks. Since it was night, I couldn't tell if there was any smoke or not. I will check today and report back. Thanks! __________________

10-11-2007, 07:26 AM	#8
statik Zilvia FREAK! Join Date: Oct 2003 Location: Long Island, NY Age: 40 Posts: 1,358 Trader Rating: (0) Rides Gallery: statik Feedback Score: 0 reviews	Try adjusting the TPS as well. If you dont have an SR FSM, PM me. __________________ 97 240sx esaarr \| Current Status: SOLD

10-11-2007, 12:54 AM	#4
jspek Leaky Injector Join Date: Jan 2007 Location: philly Age: 41 Posts: 105 Trader Rating: (2) Feedback Score: 2 reviews	did you check the ecu for any codes?

10-11-2007, 06:46 AM	#6
water Zilvia Junkie Join Date: Nov 2003 Location: FL Age: 45 Posts: 373 Trader Rating: (0) Feedback Score: 0 reviews	Check over ignition and pressure test for boost leaks.

10-12-2007, 07:49 AM	#9
TOMKAIRA93 Zilvia Addict Join Date: Dec 2005 Location: San Antonio, TX Age: 47 Posts: 696 Trader Rating: (3) Feedback Score: 3 reviews	Yesterday I checked for leaks and found one down in the intercooler area. Fixed it and the car runs a lot better but now it craps out on me at 4k rpm. I can shift fine, but if I rev it up pass 4k, it will start crapping out again. I suspect another boost leak around the hot pipe, it needs some welding. Hopefully this will fix the problem. But if it doesn't, what else? __________________