QuickStyle

does the nuetral safety switch change the idle speed through the computer or something? i had to set my idle at around 1400 so when it goes in gear it wont die. the idle drops down to 800-900 when i put it in gear. i dont believe this is normal. after searching through previous posts, i think that the nuetral safety switch bumps up the idle a bit to compensate for the extra load on the engine when put in gear. am i correct? also i just adjusted my t.v. cable because it wouldnt shift propperly, and now it shifts fine except under heavy throttle it trys to shift, but the idle jumps up and i have to let off the throttle to get it to shift, the transmission shop said it needs to be rebuilt, they came to this conclusion only by test driving it, so im not sure about that.

xpndbl3

iTrader: (5)

so the transmission slips and you think the trans shop is wrong about a rebuild? :lala:

QuickStyle

im not sure if it slips, it shifts good and strong if im just cruizing, but not when i have it at heavy throttle. and another reason why i dont want to believe this shop about the rebuild is because they wanted to do a full tune up on my car (cap, rotor, wires, plugs) because he said my engine had a misfire in it. when just 2 days prior i changed the cap, rotor, wires, and plugs, and the engine runs fine, no misfire, i know what it sounds like when there is a misfire. he is just trying to get some money out of me. for a complete rebuild to oem specs he quoted me at $1300 if i pull the tranny and bring it in myself(wtf?). $1500 for a probuilt 700r4 from probuiltautomatics

xpndbl3

iTrader: (5)

$1300 seems like a normal price for these trans to be rebuilt from a shop around here. if it slips under full throttle and you have to let off the gas then the trans needs work done to it. take it to a different shop then. also your engine should never idle at 1400 RPM then drop to 800 in gear. your idle is way to high and i think you need to look into that, or have someone show you how to fix it. there's tons of people on a regional board for CA that i'm sure would point you in the right direction.

DuronClocker

iTrader: (1)

The idle *should* drop when in gear. However, your idle is way too high as mentioned, unless you have a heavily cammed car, which I'm assuming you don't. Chances are you have a fairly bad vacuum leak.

QuickStyle

i set the idle that high on purpose. if i were to set it at normal lets say around 950, it would die when i put it in gear. what i want to know is..... is there something in or on the shifter mechanism or transmission that changes the idle when put into gear? the idle drops about 500 rpms from park to drive, so i am assuming there is supposed to bump the idle up some so it doesnt die? i was think that it would open the iac valve a little bit more....

QuickStyle

:shrug:

QuickStyle

after alot of researching i have found that the shifter does affect the idle speed when put in gear. but it seems to be backwards, the idle is set to go up when in park, and not gear..... i know the idle will go up anyways when put back in park, but there are two wires that are jumped together when in park or nuetral that are wired into the neutral safety switch and the computer bumps the idle up a bit when you put those two wires together... seems like it should be the other way around to keep the car from dieing. anyway... i fix that because it wasnt hooked up on my car for some reason, the wires were just laying there, and the nss was bypassed to where it could start in gear or park. but i still cant figure out why the car dies when i drop it into gear......

firechicken_3

iTrader: (4)

idle goes up in park and nuetral because there is NO LOAD on the engine, like there is when its in gear..... it is SUPPOSED to be that way,

your problem has absolutley nothing to do with the nuetral safety switch,

you have a tune up issue, either timing is off, or you have a severe vaccum leak,

you should NOT drop 500 rpm for park to in gear, 150-200 maybe

its been a while since my car was an auto, but as i recall, it was 750 in park 600 in drive, and thats with a somewhat lopey cam as listed in the sig,

QuickStyle

i know that the idle goes up when in park/nuetral because there is no load, but there is also two wires that go to the nss that effects the idle. part of my problem had to do with the nss because it was not shifting properly, and now that i have hooked the nss up correctly, the shifting is fine, but the drop in idle speed from park to gear is just way to dramatic and i dont know where to start to find the problem.

jocool

I always thought that the nuetral safety switch was just a safety feature so that you couldn't accidentally start your car in gear. Just like the switch in a manual car that requires you to push in the clutch before it will start.

Air_Adam

All the neutral safety switch does is not allow the starter to turn over when its in any gear except P or N. Its the same as the neutral safety on a manual car, having the switch on the clutch pedal so you cannot turn the starter over unless the clutch pedal is on the floor. Its not at all connected in any way to the computer.

QuickStyle

there is 6 wires that go to the shifter...
two that are connected together when in reverse, green and blue wires(backup lights)
two that are connected together when in park/nuetral, purple and yellow wires (allows to start in park/nuetral only)
two that are connected together when in park/nuetral, black w/white and orange w/black wires(tells computer when it is in a drive gear or a park/nuetral position) not all models had this, but some did.
check for wireing diagrams and you will see what i am talking about