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| Need help in tb wiring http://4g61t.org/forum/viewtopic.php?f=17&t=8790 |
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| Author: | bd mitsu [ Wed May 05, 2004 11:04 am ] |
| Post subject: | Need help in tb wiring |
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 |
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| Author: | The Ethereal [ Thu May 06, 2004 4:23 am ] |
| Post subject: | |
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. |
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| Author: | mysteryman [ Thu May 06, 2004 7:16 am ] |
| Post subject: | |
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. |
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| Author: | The Ethereal [ Thu May 06, 2004 1:09 pm ] |
| Post subject: | |
Quote: 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? 
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| Author: | bd mitsu [ Thu May 06, 2004 9:27 pm ] |
| Post subject: | |
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!!! |
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| Author: | bd mitsu [ Thu May 06, 2004 11:35 pm ] |
| Post subject: | |
TTT |
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| Author: | The Ethereal [ Fri May 07, 2004 5:53 am ] |
| Post subject: | |
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. |
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| Author: | Flying Eagle [ Fri May 07, 2004 11:55 am ] |
| Post subject: | |
T(o) T(he) T(op) 
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| Author: | bd mitsu [ Sun May 09, 2004 11:53 pm ] |
| Post subject: | |
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? |
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| Author: | Berserko [ Mon May 10, 2004 3:21 am ] |
| Post subject: | |
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... |
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| Author: | bd mitsu [ Tue May 11, 2004 9:34 pm ] |
| Post subject: | |
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? |
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| Author: | Berserko [ Wed May 12, 2004 6:36 am ] |
| Post subject: | |
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... |
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| Author: | The Ethereal [ Wed May 12, 2004 12:47 pm ] |
| Post subject: | |
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.
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| Author: | Berserko [ Wed May 12, 2004 9:45 pm ] |
| Post subject: | |
I wouldn't want to use RTV incase it got sucked in my intake that would be a disaster... |
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| Author: | The Ethereal [ Thu May 13, 2004 12:05 pm ] |
| Post subject: | |
Exactly. But it worked for him, and he also suggested fabbing a gasket instead of using the RTV. |
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