WeGotMud

Projects & Parts => Garage/Tech => Topic started by: Crazymays77 on February 19, 2009, 08:38:05 PM

Title: 88 jeep runs fine in park, stalls when taken out of park FIXED
Post by: Crazymays77 on February 19, 2009, 08:38:05 PM
ok guys i bought this off of broncomudhead. he told me about it and he tried what he thought was wrong with it. but didnt work so i'm gonna ask you guys. ok it will start and run but if you let go of the key it will shut off. if i hold the key in the start post. it will stay running. then if i try to shift it it will shut off. so he was thinking ign so he changed it and that wasnt it. so i thought neutral switch. what do u all think. i know if i try to start it in nuetral i have to mess with the shift to get it to turn over. let me know thanks.
Title: Re: 88 jeep having problems starting
Post by: Eroq on February 19, 2009, 08:39:58 PM
sounds like 2 things.. neutral saftey switch(have to wiggle it in neutral to get it to start) , and ignition switch...
Title: Re: 88 jeep having problems starting
Post by: Crazymays77 on February 19, 2009, 08:41:44 PM
so if i put a push button it should fix it? and bypass the switch
Title: Re: 88 jeep having problems starting
Post by: Eroq on February 19, 2009, 08:46:58 PM
i would replace the stock switch first...  autozone has them for like $10
Title: Re: 88 jeep having problems starting
Post by: Crazymays77 on February 19, 2009, 08:50:00 PM
he replaced it this morning and it didnt work i think he took that one back out thou and put the old one back in
Title: Re: 88 jeep having problems starting
Post by: CRAZY MAN broncomudhead on February 19, 2009, 09:31:23 PM
NO LEFT NEW ONE IN AND WHAT IT DOES IS WHEN YOU START THE JEEP AND HOLD THE KEY ON IT WILL STAY RUNNNG AND IF YOU LET THE KEY GO OR PUT IT IN GEAR IT WILL SHUT OFF
Title: Re: 88 jeep having problems starting
Post by: Crazymays77 on February 20, 2009, 06:40:34 PM
ok guys i need help. i tried to hot wire it so the ignition wasnt a factor and that didnt work. its not the neutral switch. i do know that the shifter needs to be adjusted but i dont see how that would be the problem. anybody help me thanks
Title: Re: 88 jeep having problems starting
Post by: Disturban on February 20, 2009, 07:15:56 PM
Somewhere you got a Bad ground in the run circuit your key positions are Ac-Stop-Run-Start. I have had a few cars do that in my life and it was always the ignition switch. However you changed the switch so I would start looking into the circuitry that is supposed to be on when that key is in the run position. Put a voltage meter on the power supply wire on your coil. Then have someone start it holding the key in the start position...then when they let it turn to the run position see if ya still got voltage.
Title: Re: 88 jeep having problems starting
Post by: Crazymays77 on February 20, 2009, 07:19:15 PM
ok thanks
Title: Re: 88 jeep having problems starting
Post by: Disturban on February 20, 2009, 07:24:24 PM
If all else fails you could hot wire it. You will need two relays, toggle switch and a push button switch. Probably looking at 30 or 40 bucks for everything.
Title: Re: 88 jeep having problems starting
Post by: Crazymays77 on February 20, 2009, 07:29:02 PM
nope i tried that. thats what i was saying before. i just didnt use a push button just stuck the wires together. but when i take the starter wire off(which would be on the push button) it dies......
Title: Re: 88 jeep having problems starting
Post by: Crazymays77 on February 20, 2009, 07:29:31 PM
so i have been told it could be the starter or solenoid. what do you think
Title: Re: 88 jeep having problems starting
Post by: THAT MUDFIT GUY on February 20, 2009, 07:34:02 PM
i think its the solenoid because if your not getting full contact through the solenoid then it wont stay running  when youlet off the key your losing contact in teh solenoid  and cuttin power to the rest of the system
Title: Re: 88 jeep having problems starting
Post by: Crazymays77 on February 20, 2009, 07:42:54 PM
get up here and help me derek....ha ha i will look into it when i have help so i have a better way to test this crap. darn thing.
Title: Re: 88 jeep having problems starting
Post by: Bigdaddy on February 20, 2009, 07:48:45 PM
I had a 76 mercury comet that would only run when key was in start position, it was the ign computer box, might be the computer is bad on it ==idunno
Title: Re: 88 jeep having problems starting
Post by: Bigdaddy on February 20, 2009, 07:55:50 PM
Uncle Tom says its the switch on steering colume /spelling*
its a lil box
Title: Re: 88 jeep having problems starting
Post by: THAT MUDFIT GUY on February 20, 2009, 07:57:04 PM
he already bypassed it by hotwiring it before the  switch
Title: Re: 88 jeep having problems starting
Post by: Crazymays77 on February 20, 2009, 08:52:57 PM
kevin replaced that part before i bought it. plus i bypassed it anyways. what about the coil resistor? it omhs out right but could be bad i think
Title: Re: 88 jeep having problems starting
Post by: Disturban on February 20, 2009, 08:57:56 PM
If you run a hot wire from the battery to the coil it still wont stay running?
Title: Re: 88 jeep having problems starting
Post by: Crazymays77 on February 20, 2009, 09:16:43 PM
didnt try that yet i found a short in the box that is next to the battery. it has a wire from batt. then a bunch of fusable links from there. i wiggled them and tried to start it and there was nothing so i wired the starter to roll over and wiggled the wires again and it rolled over. so i'm going to cut them out and rewire it and see what happens
Title: Re: 88 jeep having problems starting
Post by: Disturban on February 21, 2009, 03:00:55 AM
Quote from: crazymays77 on February 20, 2009, 09:16:43 PM
didnt try that yet
Thats why I said if ya really have too you need two relays a toggle switch and a push button switch. One relay will be your ignition on controlled by toggle switch so it is either ON or OFF (Power to the coil) and the other relay will use the push button to energize the starter. You will have to use relays if you do this to avoid melting your switches or wires. I would do everything you can to find the short first though.
Title: Re: 88 jeep having problems starting
Post by: Crazymays77 on February 21, 2009, 03:36:46 AM
i will but i never use relays and havent had a problem yet
Title: Re: 88 jeep having problems starting
Post by: THAT MUDFIT GUY on February 21, 2009, 06:35:56 AM
ive never used relays on push button system either i always just use big enough wire lol     ya corey id cut out that fusible link p00  and go from there 
Title: Re: 88 jeep having problems starting
Post by: Crazymays77 on February 21, 2009, 10:42:42 PM
so i changed the starter relay and that wasnt it. i'm thinking if i unplug the wire from the starter and hook the wire inside the truck that is for the starter to power and then find what all has power when that wire is hot and then maybe i can find out what is wrong. or maybe i can leave that wire hot and run a new wire to the starter. but then i have to figure out why it will die when i take it out of park. i guess no one has a clue about this either. oh well i will figure it out someday.
Title: Re: 88 jeep having problems starting
Post by: Crazymays77 on February 21, 2009, 11:05:38 PM
ok i got it wired so it will stay running.... but when i take it out of park it dies. anyone have a clue on that? If i can bypass what ever is doing that then i will be fine. i'm thinking its the neutral switch acting up. gonna try to remove it all together and see what happens.
Title: Re: 88 jeep having problems starting
Post by: Econo-box from Hell on February 21, 2009, 11:14:04 PM
Here's what I think.  You may have a ballast resister in your ignition system.  When the key is in the start position the ballast resistor is bypassed and the coil gets 12 volts to start.  When you key is in the run position it sends voltage through the ballast resistor knocking the voltage to the coil down to 9 volts.  Ballast resistors are usually white ceramic looking things mounted to the fire wall or fender.  It will have a terminal on each end of it.  To test it place the key in the run position and check voltage on each side of the resistor.  12 volts in and ~7-9 volts out is what you are looking for.  12 volt in and nothing out means you have a bad ballast.  If this doesn't work pm me and I will see what I can do.
Title: Re: 88 jeep runs fine in park, stalls when taken out of park
Post by: THAT MUDFIT GUY on February 22, 2009, 03:28:22 PM
hey corey  glad you got it to stay runnin  now hopefully its just the nss  and itll be able to go wheelin soon  man let me know what happened  with it
Title: Re: 88 jeep runs fine in park, stalls when taken out of park
Post by: Crazymays77 on February 22, 2009, 04:55:46 PM
ok so now i found out that when i put it into gear it is killing the power to the fuel pump. i dont know what else its killing power too but thats what i found out for now.
Title: Re: 88 jeep runs fine in park, stalls when taken out of park FIXED
Post by: Crazymays77 on February 22, 2009, 06:09:49 PM
I got it to run and move now. something with the neutral switch. i just wired it up so the computer thinks its in park all the time. I'm wondering if its dirty and needs to be cleaned out or something. only thing i cant get is why does the wire that kicks the starter in run the fuel pump also. so if i touch that wire to a hot it starts it but when i take it off so the starter isnt engaged it kill power to the fuel pump. so how do i wire it back to normal and then wire the fuel pump seperate. i cant just run a wire to the pump. it has to go thru the relay right? anyone know the answer to that question?
Title: Re: 88 jeep runs fine in park, stalls when taken out of park FIXED
Post by: Econo-box from Hell on February 22, 2009, 10:36:26 PM
Something is not right.  I've never seen a fuel pump wired into a neutral safety switch.  I would guess you have a crushed / worn through wiring harness and you are getting (or not getting) voltage into the wrong wires.
Title: Re: 88 jeep runs fine in park, stalls when taken out of park FIXED
Post by: Crazymays77 on February 22, 2009, 10:48:04 PM
yeah i dont understand it i'll keep an eye on everything and see what happens.
Title: Re: 88 jeep runs fine in park, stalls when taken out of park FIXED
Post by: hot rod heep on February 24, 2009, 07:04:00 AM
if u ever figer it out let me know i cobbled mine 2 work 4 now
Title: Re: 88 jeep runs fine in park, stalls when taken out of park FIXED
Post by: scooter08 on February 24, 2009, 11:38:43 PM
good idea because if it rolls over and starts it's not the solenoid