my 2001 ram 1500 4x4 with 5.9 and 137000 miles wont start. i disconnected the battery for 3 weeks as i was changing my radiator and doing some work under the truck ( after so long with battery disconnected the PCM memory gets wiped and the truck will start but not idle , it just dies . but after running for 5 to 10 min it will idle fine ( no biggie have had this when the battery was dead from me leaving the headlights on. it just takes awhile for the PCM to reset ) OK i get the truck running go for a little spin about 15 to 20 min come back let it idle for 15 min then it dies . then it wont start it acted like it was going to start for the first 2 or 3 times but then all it will do is crank over . i checked the trottle body to see if the injectors were working and if i was getting gas ( good ) then checked to see if the fuel pump is working (i get the little whirling noise when the key is in the run postion ) i then checked the fuel pump relay and fuse ( both good ) checked the ASD relay and fuse ( both good ) also checked the see if i was getting voltage at the PDC for both the fuel-pump relay and ASD relay both were fine . i then checked to see if i was getting spark ( i was NOT ) i started from the PDC and worked my way back looking for bad plugs, burnt wires and bad connections all the way to the coil then checked the primary and secondary resistance of the coil ( both were in spec ) then checked all spark plugs and wires ( all were good ) also checked all wires and eletrical connections in the engine bay ( all was good ) as i just did a tuneup ( new plug wires and spark-plugs new cap and rotor and air-filter and PVC valve ) about 2 months ago i didn't think it was any of these. also the truck was running fine before all of this . so i am at a loss as to why i cant find the problem !!!!! any help would be greatly app.

 

What work were you doing under the truck? Any chance you would have hit the crankshaft position sensor?

 

no was doing some diff work , changing oil front and rear inspecting the brake lines stuff like that. also the truck started fine and ran fine no rough idle or spitting or choughing

 

i think that my problem lies in that i am getting a kill event from the ASD relay but have checked it and found nothing wrong

 

bumpy

 

Did you check the fuel pressure with a gauge?

 

when you start it up, if you keep your foot on the gas pedal and crack the throttle a little, will it stay running? if so its a weak battery or IAC issue.

 

might be the battery. SOmetimes dosconnecting it makes it die. Bring the battery to autozone and have them check it. If it is weak, they can charge it for you, if it is dead you can get a new one.

Also, where in arkansas are you? I am in Ft Smith, although originally from NJ.

 

im from batesville but i live in N.O. LA brand new battery just got it like a month ago.and it wont start at all not even trying to fire if u read the thread i say that i am NOT getting any spark.

 

CPS, CPK, bad relay or fuse, ground wire , coil or PCM. Have you checked the codes? And just for ships and giggles, go out and unscrew the pre cat o2 sensor and see what it does. But, check the fuel pressure with a gauge.