4g61t.org

i havbe my 60 mm tb installed on my 4g15 12v and need some kinda wirning diagram for a 1g isc to keep my idle firm... checked the tps it has 4 prongs and when i unplug it the idle rises real high.. i havnt plugged up the isc yey because the plugs are different... so if anyone has a conversion please let me know..
thanx

The 4G15 ISC is a DC motor w/ a potentiometer to tell the ECU what position the ISC is in.
The 4G6x DOHC ISC is a stepper motor. The BISS is used to actually set the ISC to a well defined starting point.

They won't swap. But you could try to adapt your 4G15 ISC to the 60 mm TB.

_________________
Got rabies?

A giant TB like that will do you know good. What you need is a SOHC TB from a 2.0L Galant, or even from the 1.8L SOHC Eclipse.

Well, it's worth a try, isn't it? There are Suzuki Swifts running around w/ a 60 mm Nissan TB, and they run good on the little 1.3L engines. Why shouldn't we 4G15 owners be lucky, too?

_________________
Got rabies?

well it seems to be working out with the vehicle fine except the throttle surges... and i cant get the screws off of the bottom of my isc's so i can swap them out....dont really know what to do...when it starts it idles high at 3000 for about 2 secs then it rises to about 4200-4500 for another sec or too then drops to 1000 with a constant throttlw surge from about 1000-1500 and never stops surging..the throttle response is sweet. pegging the rev limiter at about a quarter to half thottle..the car never bogs and dies but now i have "CEL" but i dont have anything to scan it with. figure its the isc since its not hooked up but wont know till i get everything w orking properly..Help!!!

_________________
http://www.clubgp.com/newforum/upfiles/ ... d93156.gif

TTT

_________________
http://www.clubgp.com/newforum/upfiles/ ... d93156.gif

What's TTT?

Error codes can be read very easily. Just hook an LED's positive terminal to pin 1 (the uppermost) on the diag connector and the negative terminal to pin 12 (the lowermost). Do a search, it has been explained several times how to interpret the error codes.

_________________
Got rabies?

T(o) T(he) T(op)

i swapped isc's from the 60mm with the onr from my 1.8 and my cel has gone out but the idle is still surging. so now i have no error codes and no fix... anyone else?

_________________
http://www.clubgp.com/newforum/upfiles/ ... d93156.gif

The surges are from an overly large idle bypass in that TB the 4g15 is getting way too much air put on a 1.8L Talon TB and the problem will go away...

yeah i had a 1.8 mirage tb on there and it ran great...any way to adjust the idle bypass to cut the air back or it that what my isc is supposed to do?

_________________
http://www.clubgp.com/newforum/upfiles/ ... d93156.gif

Well unless you can get someone to tig the bypass closed no.... its just the wrong TB for your car... get a 1.8L and be merry...

Sh1t f*ck h3ll d@mn! I can't find that site where a member (his name is Rob IIRC) installs a 60mm TB in his 4G64 Galant. He has a quite good writeup what to do. At first, his car idled @ 3500 revs, then he used some RTV to block some certain passages on the ISC and had his idle lowered to 900.

_________________
Got rabies?

I wouldn't want to use RTV incase it got sucked in my intake that would be a disaster...

Exactly. But it worked for him, and he also suggested fabbing a gasket instead of using the RTV.

_________________
Got rabies?