Help needed for MSS

Sunny gti · 02-25-2005, 06:44 PM

Actually i have got MSS working already one week ago, but today when driving around and testing the car after VE-->DE injector swap, I realised that something is wrong with MSS or wiring, or MSS setings, or...

When I am reving the engine to redline, MSS will start to show 0 rpm frequently from about 6500 rpm. RPM's are like jumping on the MSS screen: 0 and 6845, 0 and 6959, 0 and 7164, ...etc.
On lower RPM's it's works ok.
And of course - solenoids will be deactivated at this time. It feels VERY bad, when accelerating

RPM signal is from coil (green/yellow), I am using only RPM signal for activation.

Any suggestions??

Vahur

garyd · 02-27-2005, 03:46 AM

Mine did that, but we fixed it when we unplugged the smaller plug out of the back of the mss. I think one is for TPS and the other is a ground for the tps circuit, its ok to remove it. I have no idea why it worked, but it did

Sunny gti · 02-27-2005, 01:10 PM

I don't have this plug connected with my MSS...

It pisses me off, and I dont know what to do...

vahur

Quote:

Originally Posted by garyd

Mine did that, but we fixed it when we unplugged the smaller plug out of the back of the mss. I think one is for TPS and the other is a ground for the tps circuit, its ok to remove it. I have no idea why it worked, but it did

bill · 02-28-2005, 04:01 AM

Take rpm signal from ecu input. It will work fine.

Bill

Rockwood · 02-28-2005, 04:30 AM

Quote:

Originally Posted by Sunny gti

Actually i have got MSS working already one week ago, but today when driving around and testing the car after VE-->DE injector swap, I realised that something is wrong with MSS or wiring, or MSS setings, or...

When I am reving the engine to redline, MSS will start to show 0 rpm frequently from about 6500 rpm. RPM's are like jumping on the MSS screen: 0 and 6845, 0 and 6959, 0 and 7164, ...etc.
On lower RPM's it's works ok.
And of course - solenoids will be deactivated at this time. It feels VERY bad, when accelerating

RPM signal is from coil (green/yellow), I am using only RPM signal for activation.

Any suggestions??

Vahur

do a search, i posted the solution to this exact problem a while ago.

Sunny gti · 02-28-2005, 05:04 AM

thanks Steve, i found it.
Will try it in the evening.

<do a search, i posted the solution to this exact problem a while ago.

Vahur

Sunny gti · 02-28-2005, 08:36 AM

Steve!

Please confirm - the correct wire is pin 3, Y/R, shown on the scematic. This wire goes to resistor.
http://us.share.geocities.com/jjpalm...g_diagram1.JPG

NB! pls copy the link to address bar, just click will not work!

Vahur

Quote:

Originally Posted by Rockwood

do a search, i posted the solution to this exact problem a while ago.

Rockwood · 02-28-2005, 06:38 PM

whoops.

you dont have a US car, sorry, i didnt realize that until now.

can you post the actual link or a tiny URL link? my work computer doesnt allow right clicks and the URL is abbreviated on the forum.

Sunny gti · 03-01-2005, 12:59 PM

I did my best, pls try this link, it seems to be ok,
it is wiring diagram for 91-92 Sentra/NX (SR20DE).
It should be 99,99% compatible with my car.

http://foto.k-arvutisalong.ee/klient...6&p=20634 7#s

and the second half of the wiring is seen here

http://foto.k-arvutisalong.ee/klient...6&p=20632 9#s

Pin 3 Y/R wire goes to resistor (marked as F4 on wiring diagram).
Is this the correct wire to connect MSS brown rpm wire to get accurate RPM readings?

regards
Vahur

Quote:

Originally Posted by Rockwood

whoops.

you dont have a US car, sorry, i didnt realize that until now.

can you post the actual link or a tiny URL link? my work computer doesnt allow right clicks and the URL is abbreviated on the forum.

Sunny gti · 03-01-2005, 05:18 PM

I found my wiring diagrams from here, can you open this links?

http://www.sr20forum.com/showthread....ring+dia gram

if it's not ok, please give your e-mail address, i will send them for you!

regards
Vahur

Quote:

Originally Posted by Rockwood

whoops.

you dont have a US car, sorry, i didnt realize that until now.

can you post the actual link or a tiny URL link? my work computer doesnt allow right clicks and the URL is abbreviated on the forum.

garyd · 03-01-2005, 05:35 PM

Vahur,

try this apexi link. the n14 pulsar sr20det is the same as my n14 sr20de loom, so i assume its the same as yours:

http://www.apexi-usa.com/productdocu...savcr_wire.pdf

Sunny gti · 03-01-2005, 06:22 PM

Thanks, gary

According this apexi diagram it seems to be pin #2 on ecu, which gives rpm signal to tachometer and not pin #3, which was reccomended by Steve.
I am little confused, maybe both will work?

Steve - pls give your comment!

I want to be sure, befor i'll go to change my wiring.

regards
Vahur

Quote:

Originally Posted by garyd

Vahur,

try this apexi link. the n14 pulsar sr20det is the same as my n14 sr20de loom, so i assume its the same as yours:

http://www.apexi-usa.com/productdocu...savcr_wire.pdf

hpro123 · 03-02-2005, 09:03 AM

Vahur's diagram... sorry for the size...

Sunny gti · 03-04-2005, 04:30 AM

Thanks Steve

I followed your instructions and SR20DE wiring diagram and rewired MSS rpm wire. Now seems to be ok!

regards
Vahur

Quote:

Originally Posted by Rockwood

whoops.

you dont have a US car, sorry, i didnt realize that until now.

can you post the actual link or a tiny URL link? my work computer doesnt allow right clicks and the URL is abbreviated on the forum.

blitzmr2 · 05-02-2005, 08:02 PM

How exactly are you physically gaining the signal from the RPM wire in question? A vampire connector? Something else?

Sunny gti · 05-04-2005, 08:18 AM

yes, i used a vampire connector

vahur

Quote:

Originally Posted by blitzmr2

How exactly are you physically gaining the signal from the RPM wire in question? A vampire connector? Something else?