ever check injector pulse

 

Have you checked the pickup in the distributor? I spent 2 weeks troubleshooting mine the same way. I even replaced the same parts you did. It all turned out that the magnet on the pickup had been sheered off by the rail in the distributor. Replaced the distributor, it came with a pickup, and fired on the first key turn. Hope this helps. I'm new here so just trying to be of help.

 

1. Test powers and grounds at the Powertrain Control Module (PCM) on the C1 connector. Pins 2 and 22 are power, then check pins 31 and 32 for ground.

2. Next, test the 5 volt power supplies at pin 17 of the C1 connector and pin 31 of the C2 or middle connector for shorts to ground. Sensors on the circuit are the Camshaft Position (CMP) sensor, Crankshaft Position (CKP) sensor, Throttle Position Sensor (TPS), Manifold Absolute Pressure (MAP) sensor and Vehicle Speed Sensor (VSS).

3. Unplug the sensors on the 5 volt power supply, one at a time, while monitoring the 5 volt supply.

4. When the shorted sensor is unplugged, the PCM will wake up and scan tool communication will return.

5. The wiring harness could also be shorted to ground on one of the 5 volt power supply wires. Cut the wires at the PCM on pins C1-17 and just unplug the center connector. Then check for the 5 volts on the PCM of the connector or checking for any continuity to ground with the sensors unplugged at the PCM connector on C1-17 and C2-31 to check the wiring harness.

 

injector pulse is controled by this module

 

well today when i went to work on my jeep i pushed it in brothers garage then put batt. on then i thought i would try to start it thinking it might start but this time it wouldn't even click nothing it wouldn't even make the selinoid click so i climbed under and jumped it to see if starter was stuck or something but it cranked then we looked around to see if anything was unhooked but no then we worked the switch a few times then put batt booster on it to make sure batt wasn't bad and nothing then after scratching my head and cussing awhile thinking gremlins were after my jeep my wife climbed in and the darn thing turned over but still no fire the thing now is i don't know if switch or bad wire or what got fustrated and pushed back out side and came home with head hung low

 

I got access to a 95 jeep cher. 2 door and i was wondering if i could put my pcm in it to see if would start it. is that possible to do this without screwing up the 95 jeep it don't belong to me and would feel real bad messing up a jeep it has the same engine and is an auto trans also like to just put my pcm in there just long enough to see if would fire and run for a couple of min. to see if the pcm is bad so i can eliminate at least as much as i can then if that doesn't work maybe swap out some stuff before i tackle the wiring harness man all them wires are scary


ps don't know if the pcm has the same numbers but would it make diff. if i wasn't going to leave it in there for any length of time?

 

well today i checked the module that goes under distributor cap on the 95 and it started right up so now going to check pcm on a friends jeep his is a 96 also we are gonna check to see if my pcm gives his jeep any spark if so then its gotta be key switch or wiring harness right? should be about all thats left or what else could be left?????

 

Check the o2 sensors and see if the wires may have melted together.
Seen this many times

 

would the 02 sen. keep it from firing I looked at the first one doesn't look burt but i am going to replace it later when money comes in because i think it might be nad but not so it would stop the
fire would it?

 

No I have never had a bad oxygen sensor keep any of my vehicles from starting. So you have spark and fuel and it still won't start? Being that it started to sputter and not run good before it completely died on you I would look into the timing. Wait you don't have spark. If you did break your timing chain which isn't really likely but is possible, take your cap off and crank the engine to see it your rotor is spinning.

 

well today i took my pcm to a friend who has a 96 jeep like mine except a standard to hook up on his jeep well my pcm didn't fire but his did so he loaned me his to check out on mine to see if will just fire and start up don't think i can keep it on mine it has different numbers and his works with a standard and mine is a auto so i know that will throw a code and no telling how many more would come up if i kept it in my jeep so this is to just see if will fire and maybe start for a couple of seconds before i shut it down and return it to my friend let you know more after test

 

I dont think swapping pcms is a good idea could destroy your friends if not something else

 

If the o2 wires melt together from the exhaust heat In most cases it causes a short which pops the ecm fuse and can cause the vehicle not to start!

Edit: Btw yes if this happens it will cause it not to have any spark

 

Ok well i changed the pcm and it started right up only thing is now i'm back to the same missing and sputtering as it did before i lost all fire so i have noticed that it idles great and when you rev it it sounds pretty good too but then you put it down in gear and give it some gas to go then it starts to spit and sputter when out on road and still misses like crazy until you lower your rpm then is ok just when speeding up but on the other hand when it quit and i went to start it it wouldn't crank or anything so fiddled with the switch and banged the steering wheel in anger then it cranks and starts but still spits and sputters so what now the switch is bad or the neutral safety switch is bad would that cause it to spit and sputter like that or is it all going bad like a chain of events or a bad wire or what man i;m going crazy I find why it isn't firing now back to square one . PLEASE HELP

ps the thing under the distributor cap is good the coil is new ,crankshaft sensor new, pcm is different and giving good fire but not the one that's going to stay in jeep just a temp to get it to fire

pss i took my pcm and put it on my friends jeep and no fire at plugs so what ever it is that started my jeep spitten and sputtering must have messed up my pcm

 

sounds like the tps could be bad if you have a volt meter you can test it