Sr20det bogging at 400rpm...??? - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

shawn240sx · 11-04-2007, 12:37 AM

I just installed an sr20det blacktop, everything went in smooth, idle is good, no boost leaks, turbo is good...minimal to no shaft play, no leaks, oil is at spec, oem BOV...only upgrade is a walboro 255 , mishmoto and air intake, done during the install.
At 4000rpm in every gear it seems to bog and hold back???? Any one experience this before?...if so solution ? any advice much appreciated.
CAS was adjusted to spec.

EJ253 · 11-04-2007, 12:56 AM

thats right when boost comes on for the most part
check your sparkplugs.
re-gap them to .030

or maybe theyre fryed

tt99ol · 11-04-2007, 01:18 AM

check your ignition timing also should be 15 +/- 2 Degrees or the 5th mark from the left

shawn240sx · 11-04-2007, 03:27 AM

I will try the regap i think mine are at .036

RACETUNE · 11-04-2007, 06:27 AM

MAF or that Fuel Pump you are using

shawn240sx · 11-05-2007, 01:31 AM

Damn! I reset the gap on sparkplugs to .030 and still the same thing.
Maf I will have to check...wish I knew someone local who could let me test this.
I hope not the new walboro??...is this common?
Thank you for the help Racetune.

AznDrftr. · 11-05-2007, 01:35 AM

LOL, yea mines doing that now, but not exactly sure. Just happened tonight. It bogs roughly when boost is kickin around 3k RPM. Check MAF though for sure.

tt99ol · 11-05-2007, 01:39 AM

walbros dont make sr's run bad, what did your plugs look like when you pulled them out?

projekt_s13 · 11-05-2007, 02:45 AM

I have a Sr MAF you can use to test.
Let me know

shawn240sx · 11-05-2007, 09:47 AM

Projekt, thanks for the offer...I am gonna try the sohc maf if it doesnt work I will contact you.
I want to thank everyone for their replies and I will post the outcome. Maybe this will help some guys with a similar issue.
Re: Spark plugs I pulled and regapped, they had a little bit of a white hue on the metal.

SILVIA_KIDs14.5 · 11-05-2007, 10:05 AM

most likely you MAF i had a similar problem pickup a z32 Maf and worked like a charm no problems since good luck

unicoladron · 11-05-2007, 10:07 AM

set your ecu into diag mode and see if it throws any codes.

shawn240sx · 11-05-2007, 03:06 PM

My blacktop ecu is an e5 but is missing the LED, either it broke off during shipping?...or just was neva put on?....how do I run diagnostic mode? Does the check engine light give me codes this way? I just dont want to mess up the ecu.
Z32 maf replacement will not require a re tune on the ecu?....
THanks everyone for your input...

11-04-2007, 12:37 AM	#1
shawn240sx Zilvia Addict Join Date: Dec 2003 Location: Bay Area Posts: 906 Trader Rating: (1) Feedback Score: 1 reviews	Sr20det bogging at 4000rpm...??? I just installed an sr20det blacktop, everything went in smooth, idle is good, no boost leaks, turbo is good...minimal to no shaft play, no leaks, oil is at spec, oem BOV...only upgrade is a walboro 255 , mishmoto and air intake, done during the install. At 4000rpm in every gear it seems to bog and hold back???? Any one experience this before?...if so solution ? any advice much appreciated. CAS was adjusted to spec. __________________ FONT="Century Gothic"][/FONT] Last edited by shawn240sx; 11-04-2007 at 02:48 AM..

11-04-2007, 12:56 AM	#2
EJ253 Zilvia FREAK! Join Date: Oct 2006 Location: Salt Lake City Age: 36 Posts: 1,154 Trader Rating: (0) Rides Gallery: EJ253 Feedback Score: 0 reviews	thats right when boost comes on for the most part check your sparkplugs. re-gap them to .030 or maybe theyre fryed __________________ The gap between MORE and ENOUGH never closes. DriftUtah \| UtahNissans \| MySpace \| I <3 Drifting. Keep it Real. Secret Society

11-04-2007, 03:27 AM	#4
shawn240sx Zilvia Addict Join Date: Dec 2003 Location: Bay Area Posts: 906 Trader Rating: (1) Feedback Score: 1 reviews	I will try the regap i think mine are at .036 __________________ FONT="Century Gothic"][/FONT]

11-04-2007, 06:27 AM	#5
RACETUNE Zilvia Member Join Date: Jun 2004 Location: San Francisco & Los Angeles Age: 49 Posts: 238 Trader Rating: (0) Feedback Score: 0 reviews	MAF or that Fuel Pump you are using __________________ -Garage BOSO- -Racetune Engineering-

11-05-2007, 01:31 AM	#6
shawn240sx Zilvia Addict Join Date: Dec 2003 Location: Bay Area Posts: 906 Trader Rating: (1) Feedback Score: 1 reviews	Damn! I reset the gap on sparkplugs to .030 and still the same thing. Maf I will have to check...wish I knew someone local who could let me test this. I hope not the new walboro??...is this common? Thank you for the help Racetune. __________________ FONT="Century Gothic"][/FONT]

11-04-2007, 01:18 AM	#3
tt99ol Zilvia Addict Join Date: Jan 2005 Location: quartz hill CA Age: 38 Posts: 644 Trader Rating: (8) Feedback Score: 8 reviews	check your ignition timing also should be 15 +/- 2 Degrees or the 5th mark from the left

11-05-2007, 01:35 AM	#7
AznDrftr. BANNED Join Date: Apr 2006 Location: 254 \| Texas. Age: 38 Posts: 2,293 Trader Rating: (3) Rides Gallery: AznDrftr. Feedback Score: 3 reviews	LOL, yea mines doing that now, but not exactly sure. Just happened tonight. It bogs roughly when boost is kickin around 3k RPM. Check MAF though for sure.

11-05-2007, 01:39 AM	#8
tt99ol Zilvia Addict Join Date: Jan 2005 Location: quartz hill CA Age: 38 Posts: 644 Trader Rating: (8) Feedback Score: 8 reviews	walbros dont make sr's run bad, what did your plugs look like when you pulled them out?

11-05-2007, 02:45 AM	#9
projekt_s13 Post Whore! Join Date: Jul 2005 Location: Chico/Pittsburg, CA Age: 39 Posts: 2,801 Trader Rating: (5) Rides Gallery: projekt_s13 Feedback Score: 5 reviews	I have a Sr MAF you can use to test. Let me know __________________

11-05-2007, 09:47 AM	#10
shawn240sx Zilvia Addict Join Date: Dec 2003 Location: Bay Area Posts: 906 Trader Rating: (1) Feedback Score: 1 reviews	Projekt, thanks for the offer...I am gonna try the sohc maf if it doesnt work I will contact you. I want to thank everyone for their replies and I will post the outcome. Maybe this will help some guys with a similar issue. Re: Spark plugs I pulled and regapped, they had a little bit of a white hue on the metal. __________________ FONT="Century Gothic"][/FONT]

11-05-2007, 10:05 AM	#11
SILVIA_KIDs14.5 Zilvia Junkie Join Date: Nov 2006 Location: CT Age: 38 Posts: 368 Trader Rating: (-1) Feedback Score: -1 reviews	most likely you MAF i had a similar problem pickup a z32 Maf and worked like a charm no problems since good luck

11-05-2007, 10:07 AM	#12
unicoladron Zilvia Junkie Join Date: Jul 2007 Location: Long Island, NY Age: 40 Posts: 568 Trader Rating: (0) Feedback Score: 0 reviews	set your ecu into diag mode and see if it throws any codes. __________________ 1993 KA24DE for sale with 180k..running when pulled.... need to get rid of ASAP...i'm moving

11-05-2007, 03:06 PM	#13
shawn240sx Zilvia Addict Join Date: Dec 2003 Location: Bay Area Posts: 906 Trader Rating: (1) Feedback Score: 1 reviews	My blacktop ecu is an e5 but is missing the LED, either it broke off during shipping?...or just was neva put on?....how do I run diagnostic mode? Does the check engine light give me codes this way? I just dont want to mess up the ecu. Z32 maf replacement will not require a re tune on the ecu?.... THanks everyone for your input... __________________ FONT="Century Gothic"][/FONT]