Welcome to the North American Subaru Impreza Owners Club Wednesday August 20, 2014
Home Forums WikiNASIOC Products Store Modifications Upgrade Garage
NASIOC
Here you can view your subscribed threads, work with private messages and edit your profile and preferences Home Registration is free! Visit the NASIOC Store NASIOC Rules Search Find other members Frequently Asked Questions Calendar Archive NASIOC Upgrade Garage Logout
Go Back   NASIOC > NASIOC Technical > Subaru Conversions

Welcome to NASIOC - The world's largest online community for Subaru enthusiasts!
Welcome to the NASIOC.com Subaru forum.

You are currently viewing our forum as a guest, which gives you limited access to view most discussions and access our other features. By joining our community, free of charge, you will have access to post topics, communicate privately with other members (PM), respond to polls, upload content and access many other special features. Registration is free, fast and simple, so please join our community today!

If you have any problems with the registration process or your account login, please contact us.
* Registered users of the site do not see these ads.
Reply
 
Thread Tools Display Modes
Old 08-03-2003, 12:00 PM   #1
go go go
Scooby Specialist
 
Member#: 2784
Join Date: Oct 2000
Location: Japan
Default engine swap: won't rev: why?

Hi,
I did the engine conversion by myself.
99 JDM STi motor on 94
did wiring by myself too.
The motor started up but won't rev more than 3000rpm
3000rpm is just around when the vacuum turns to boost.
It sounds like speed/rev limiter but don't know why it does that.
Runs fine upto 3000rpm

ECU is Apex PowerFC. I set the rpm at 7800
MAF is Nissan 300ZX
idle is fine.
TPS seems to be working (giving correct voltage)
I have Blitz boost controller on it.
I have stock 94 guage cluster (tach doesn't work because of that. Using Apex monitor to check the Rev)
Using stock 94 wiring harness for the most of the part

any idea why it's not reving?
i appreciate any info.
thanks
* Registered users of the site do not see these ads.
go go go is offline   Reply With Quote
Old 08-03-2003, 01:14 PM   #2
motorswapsleeper
Scooby Specialist
 
Member#: 38946
Join Date: Jun 2003
Location: yay...IRAQ...yay...
Vehicle:
199? 6 diff ones
bag o' skittles

Default

I didn't know the 300zx maf was compatible...
motorswapsleeper is offline   Reply With Quote
Old 08-03-2003, 03:28 PM   #3
go go go
Scooby Specialist
 
Member#: 2784
Join Date: Oct 2000
Location: Japan
Default

300ZX maf is only compatible because i use Apex-i PowerFC stand alone ECU.
Apex ECU has map for 300ZX maf sensor.
go go go is offline   Reply With Quote
Old 08-03-2003, 04:12 PM   #4
scobaru
Scooby Guru
 
Member#: 31345
Join Date: Dec 2002
Chapter/Region: MWSOC
Location: Wisconsin
Vehicle:
05 LGT, GC8, NA
blue, white, blue

Default

how hard was wiring I got a 94 also I heard jdm engines didn't use obdII till 2000 is this true with you?
scobaru is offline   Reply With Quote
Old 08-03-2003, 11:49 PM   #5
go go go
Scooby Specialist
 
Member#: 2784
Join Date: Oct 2000
Location: Japan
Default

wiring is tough. finished the swap in half a day but taking 3 months to do the wiring..

My Nissan friend said it could be the speedo sensor, anybody know about this issue?
My car is 94, which uses cable speed sensor...
My motor and ECU is 99 and the speedo sensor for 99 is electric.
If I put the electric sensor, would I be able to solve the rev problem?
go go go is offline   Reply With Quote
Old 08-04-2003, 12:38 PM   #6
Boeleni
Top Scoob 003
 
Member#: 1812
Join Date: Jul 2000
Location: Mississauga, Ontario, Canada
Vehicle:
1999 Impreza Try-R
Satin Black

Default

Sounds like the car is in limp mode. But you are not using the stock ecu right?

I think the answer lies in the settings you have in the Power FC. I had a similar problem when I was setting up the speed limit cut with the Apex'i RSM.

Also double check the MAF wiring and condition of the MAF. A blown MAF will not allow the car to go on boost.

On pre 2002 cars you can disconnect the speed sensor and it will not go into limp mode. The Idle Air Control valve won't work properly though.
Boeleni is offline   Reply With Quote
Old 08-05-2003, 11:55 AM   #7
Jaxx
NASIOC Supporter
 
Member#: 177
Join Date: Aug 1999
Chapter/Region: NWIC
Location: Boise,Idaho,USA
Vehicle:
The 93 Imp W/EJ20K
flat black

Default

fwiw the 300z maf is the same as a 1.8 subaru maf

i don't think it has to do with the speed sensor/ dash, should be seperate ..

how much can you monitor with the power fc? is there software for it. can you see the voltage comming out of the maf change when you rev the engine?


scobaru: no jdm engines are OBD-2 compliant even the newest ones
Jaxx is offline   Reply With Quote
Old 08-05-2003, 01:51 PM   #8
scobaru
Scooby Guru
 
Member#: 31345
Join Date: Dec 2002
Chapter/Region: MWSOC
Location: Wisconsin
Vehicle:
05 LGT, GC8, NA
blue, white, blue

Default

well let's say I have both side of the wire harnesses like u would in a front clip would that take out a lot of the work when doing the swap?
scobaru is offline   Reply With Quote
Old 08-05-2003, 03:20 PM   #9
garface
Scooby Guru
 
Member#: 1581
Join Date: Jun 2000
Chapter/Region: Tri-State
Location: yonkers, ny
Vehicle:
MY00 RS/STi7
MY01 RS Both Silverthorne

Default

I have a Ver. 4 STi speed sensor if you need it. Just email or pm me whenever you find out.
garface is offline   Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
Engine Swap: What shop to use in SoCal? SubaruPreza Southern California Impreza Club Forum -- SCIC 94 02-19-2005 09:03 PM
Engine Swap: Who's Done it MoeRS Normally Aspirated with bolt-on Forced Induction Powertrain 16 03-16-2003 06:14 AM
engine swap: ECU + TCU question Cajual Transmission (AT/MT) & Driveline 0 12-07-2002 05:02 AM
Engine swap: Where? cardin555 Canada Region Forum 30 10-19-2002 05:38 PM
Engine swap: Western Canada Titanium Samurai Vancouver Impreza Club Forum -- VIC 11 10-15-2002 12:28 AM


All times are GMT -4. The time now is 03:57 PM.


Powered by vBulletin® Version 3.7.0
Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
Powered by Searchlight © 2014 Axivo Inc.
Copyright ©1999 - 2014, North American Subaru Impreza Owners Club, Inc.