|
|
|
|
|
Go
|
New
|
Find
|
Notify
|
Tools
|
Reply
|
|
Dirt Road Driver |
On my 720 when the switch is connected and the clutch released it dosnt run very good and backfires through the carb and dosnt idle, so i unbolted it. So my question is what does it (supposed) to do.
90 pathfinder w/31's sold the 720 |
||
|
NISSAN4WHEELER |
That's very weird, sounds like a short circuit or something because the switch is only there to interupt the starter as far as I know.
|
|||
|
Ultimate N4Wheeler |
Yup, weird... W/ it disconnected it runs like a champ?
..................... "Climate change is no longer science. It's politics... Climate change is also about power. Power to control.... It's about who gets to decide: how much energy we will have... where that energy will come from... what it will cost... It's about simulations, scenarios and monsters conjured up by computer models that should never be used to chart government policy -- especially on matters that will profoundly affect our livelihoods, living standards, life spans and dreams of a better future. "So hold onto your wallets, and hope you can hold onto your homes, cars and jobs. You're about to be put on a wild political roller coaster." - Paul Driessen, TownHall.com ( the lies of global warming)> http://www.youtube.com/watch?v=-zeGY8zbzc8 |
|||
|
Rock Crawler |
Actaully I think theres 2 switchs on the clutch and neither are used for starter. None of my 85s had starter bypass circuits.
Used when decelerating to prevent anti back fire. I would have to look in my old FSM. Barry 93 D21 King Cab SE - 35s, SAS + stuff 92 Pathfinder SE - Auto SAS 3 link 04 Quest SE - stock, perfect!!! |
|||
|
|
Rock Crawler |
Its used for running on one set of plugs. Normally all 8 fire. You may not be running on all 8 at idle without this switch!
Its connected directly to the ECU (computer) Check your ECU for codes. The switch basically tells the ECU when the clutch is depressed. The other switch is on the trans to tell ECU when its in Neutral. Barry 93 D21 King Cab SE - 35s, SAS + stuff 92 Pathfinder SE - Auto SAS 3 link 04 Quest SE - stock, perfect!!! |
|||
|
|
Dirt Road Driver |
Yeah it runs great w? it disconected, like crap when it is
That may be what it is for because i have a straight exhaust with a glass pack and if i use the engine to brake it back fires like crazy, and when i shift through the gears? maybe thats why it is been doing that
Its an 83 would it hava ecu, I didnt thuink that it had one, since there arent any engine sensosr as far as i can see 90 pathfinder w/31's sold the 720 |
|||
|
|
Rock Crawler |
Yes you have an ECU under the driver seat. I have the Factory service manual. I am looking at the schematics for the switch. Its pretty basic what the ECU does. Mostly timing, carb, fuel pump and spark plug control. Its steel little box. The 86.5+ are under the pass seat and are mostly aluminum.
Barry 93 D21 King Cab SE - 35s, SAS + stuff 92 Pathfinder SE - Auto SAS 3 link 04 Quest SE - stock, perfect!!! |
|||
|
|
Dirt Road Driver |
What year is your service manual for, not to go against what you said, but i looked at mine and there wasnt a ecu nder the drivers seat???? but there is a pretty small box under the pasenger seat whith some wiring, but that is all i can find, i even looked under the carpet, I think it was a year or two later that the had the computer controlled carbs and stuff. My carb only has two wires, so i dont know, but with my experiance w/ this truck who knows maybe someone cut it out??
90 pathfinder w/31's sold the 720 |
|||
|
|
Rock Crawler |
You are right theres no ECU until 1984 on CA models. All 1985+ models have ECCS (ECU).
I have a 86 FSM for 720s only. But I used it on my 2 85 720s. I would still fix or replace that switch since it does control all 8 plugs. You might be driving on just 4, which is quite a power drop, (long story). I can not find a schematic for 83 older with the clutch switch in it. Also Check the FICD on the carb. Had problems with that once. Merry Xmas.  Barry 93 D21 King Cab SE - 35s, SAS + stuff 92 Pathfinder SE - Auto SAS 3 link 04 Quest SE - stock, perfect!!! |
|||
|
|
NISSAN4WHEELER |
I just thought it was a switch to keep you from starting the rig with it in gear, at least that is how mine used to work, and the rig I had also had a "interlock" button to bypass the switch so you could start the rig with one foot on the gas and one on the brake.
|
|||
|
|
Rock Crawler |
I ve never seen a interlock switch on the 720s. Not mentioned in the 86 FSM. But I have that switch in my 93 and had one in my 88 pathy. Unfortunately I do not have one in my 96 pathy. Barry 93 D21 King Cab SE - 35s, SAS + stuff 92 Pathfinder SE - Auto SAS 3 link 04 Quest SE - stock, perfect!!! |
|||
|
|
Dirt Road Driver |
Hey Barry what is a FICD, never heard of that before?
90 pathfinder w/31's sold the 720 |
|||
|
|
Dirt Road Driver |
I figured it out, the swith does fire the exhaust spark plugs, the reason mine was running so crapy was that the #2 were swaped, put them in the right spots and now it works fine, wish i could remember what i did with those bolts that hold the switch in
 Thanks for the help, joshua 90 pathfinder w/31's sold the 720 |
|||
|
|
Rock Crawler |
Cool.
 You didnt mention you just swapped the plugs. I remember that the second set is the exhaust side. The intake side always fire. The ficd is the fast idle cutoff something. Its turns off the fuel to carb to prevent dieseling and during deceleration and idle. For example if clutch switch are ON. Barry 93 D21 King Cab SE - 35s, SAS + stuff 92 Pathfinder SE - Auto SAS 3 link 04 Quest SE - stock, perfect!!! |
|||
|
|
Dirt Road Driver |
Thanks for the help, running better.
90 pathfinder w/31's sold the 720 |
|||
|
| Previous Topic | Next Topic | powered by eve community |
 | Please Wait. Your request is being processed... |
|
|||
| Site | Nissan4wheelers.com Forum | ||
| Servlet | eve1da002 | ||
| Version | 1.3.0 build 9293 | ||
| Module | Forums 4.0.3 | ||
| Stylesheet | "Default Style" | ||
| Wordlet Set | "Default Wordlet Set" | ||
|
