s14 auto to manual swap cuts off 2500 rpm - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

kaaos · 07-13-2008, 02:30 PM

i blew my motor and threw a 5 speed in as well. now when i rev it it acts like its hitting a rev limiter or fuel cut off at 2500 rpm. wtf is wrong.
also i deleted every egr and emissions item i could including pcv. i welded the ports shut. so i dont think it has a leak.

adrians_s13 · 07-13-2008, 02:39 PM

sounds like mafs man. Usually when theres something wrong with the mafs, it goes into a "safe mode" or something that usually won't let you rev past 3k or something. Check the wiring.

SexPanda · 07-13-2008, 02:43 PM

yeah that sounds like its in safe mode. Swing down to Oreilly's and have them put that shiznit on the code reader.

Easiest way to find the problem.

kaaos · 07-13-2008, 03:44 PM

k well i got a p1105 code map / barometric pressure switch solenoid valve do i need to fix this too?
p1441 ev/v bypass valve which i think is just emissions
p0105 absolute pressure sensor circuit wtf is this?
p1605 a/t comm line yay no more a/t
p0100 mass air or volume air flow circuit this is probally the culprit
and a few more evap system codes. should i be worried about any of the other codes. trying to troubleshoot the mass air system now

jdm538 · 07-13-2008, 08:18 PM

yup thats a maf issue find a friend with a maf and diagnose.

Saviorsoul · 07-13-2008, 08:19 PM

MAFS. Find someone parting out there 240 and buy they're MAF, because a new one is EXPENSIVE

wiggafly808 · 07-13-2008, 09:28 PM

+1 on mafs.. i had the same issue, but only intermittently.. picked up a used maf, fixed the problem.

Jonnyblaze · 07-13-2008, 09:32 PM

+2 for maf.. happened to me.. replaced it.. badda bing badda boom

07-13-2008, 02:30 PM	#1
kaaos Leaky Injector Join Date: Nov 2007 Location: Wisconsin Age: 40 Posts: 98 Trader Rating: (0) Feedback Score: 0 reviews	s14 auto to manual swap cuts off 2500 rpm i blew my motor and threw a 5 speed in as well. now when i rev it it acts like its hitting a rev limiter or fuel cut off at 2500 rpm. wtf is wrong. also i deleted every egr and emissions item i could including pcv. i welded the ports shut. so i dont think it has a leak.

07-13-2008, 02:39 PM	#2
adrians_s13 Post Whore! Join Date: Jul 2005 Location: long beach, CA ^_^ Age: 40 Posts: 2,878 Trader Rating: (29) Feedback Score: 29 reviews	sounds like mafs man. Usually when theres something wrong with the mafs, it goes into a "safe mode" or something that usually won't let you rev past 3k or something. Check the wiring. __________________ @adrianfromthecastle

07-13-2008, 02:43 PM	#3
SexPanda Post Whore! Join Date: Jun 2007 Location: Where ever there is free beer Posts: 3,239 Trader Rating: (0) Feedback Score: 0 reviews	yeah that sounds like its in safe mode. Swing down to Oreilly's and have them put that shiznit on the code reader. Easiest way to find the problem. __________________ BRAND NEW GReddy PRofec E-01 EBC for sale, Cheap!

07-13-2008, 09:32 PM	#8
Jonnyblaze Zilvia Member Join Date: Feb 2007 Location: Oxnard, CA Posts: 285 Trader Rating: (1) Feedback Score: 1 reviews	+2 for maf.. happened to me.. replaced it.. badda bing badda boom __________________ '91 Hatch - Work in Progress

07-13-2008, 03:44 PM	#4
kaaos Leaky Injector Join Date: Nov 2007 Location: Wisconsin Age: 40 Posts: 98 Trader Rating: (0) Feedback Score: 0 reviews	k well i got a p1105 code map / barometric pressure switch solenoid valve do i need to fix this too? p1441 ev/v bypass valve which i think is just emissions p0105 absolute pressure sensor circuit wtf is this? p1605 a/t comm line yay no more a/t p0100 mass air or volume air flow circuit this is probally the culprit and a few more evap system codes. should i be worried about any of the other codes. trying to troubleshoot the mass air system now

07-13-2008, 08:18 PM	#5
jdm538 Post Whore! Join Date: Apr 2003 Location: LA/OC SOCAL Posts: 3,517 Trader Rating: (30) Feedback Score: 30 reviews	yup thats a maf issue find a friend with a maf and diagnose.

07-13-2008, 08:19 PM	#6
Saviorsoul Leaky Injector Join Date: Jan 2008 Location: Slidell, Louisiana Posts: 96 Trader Rating: (0) Feedback Score: 0 reviews	MAFS. Find someone parting out there 240 and buy they're MAF, because a new one is EXPENSIVE

07-13-2008, 09:28 PM	#7
wiggafly808 Zilvia Junkie Join Date: Feb 2008 Location: Corvallis, OR Posts: 346 Trader Rating: (11) Feedback Score: 11 reviews	+1 on mafs.. i had the same issue, but only intermittently.. picked up a used maf, fixed the problem.