I have a 1994 dakota 3.9l magnum 2wd clubcab
The issue..
around 5-10mins it runs great after that it starts to shake at low rpm 400 or so and after 60secs like that it stalls..if i put in nuetral I can rev it to 1200 and it will run fine until it goes low rpm..
so far iv replaced...
egr
pickup coil
coil
cap and rotor
plug wires
plugs
temp sensor
.. I took a iac and crank sensor off a 95 dakota at junk yard no change

now i need help or ideas at least
the top end was cleaned and rebuilt..

 

Have you checked the codes to see if any are stored in the PCM?

 

yes 12,55 both normal changed iac and crank sensor no luck 100$more so far iv got over 1400 in this 94
if it helps my oil pressure drops at low rpm when it trying to stall i can rev and its normal so??
the tps is one of the only things left
and iv read the cat could be bad too? straight pipe

 

Well oil pressure would probably drop with the RPM since it is driven by the camshaft. TPS is a possibility, but kind of weird that it takes ~10 mins to start acting up. It seems to be something electrical rather than mechanical if it runs fine at first. Usually if the cat is bad or clogged it will give off a sulfer smell (rotten eggs) or smell like it is running rich.

 

no smell no error codes ?>< i dont know ill replace tps as its like the only sensor i havent

 

Check the fuel pressure when it stalls, could possibly be the fuel pump shutting off when it gets warm. Also check the ASD relay, or swap it with another of the same type of relay that you don't need to run the truck (like the A/C relay). Also, I think there is a fuse associated with the ASD relay, so check that too. Look in the FAQ if you don't know where to look for it under the hood.

Always try the cheap stuff first, this won't cost you anything but a little time.

 

Check the connections for corrosion. I have a "92 and the connections were awful. Sorting out possibilities is a full time job!
Mike T

 

yes it is and i changed the asd relay and few month ago i fixed the asd wire it didnt run at all then..i changed the tps and now it only does it after mabey 10mins of being in gear...
if its in neutral it will not stall spuder or shake but in gear its not to happy.. mabey speed sensor or mabey low on fluid ?
im going to check all of that >and fix my leaky radiator hose<
this truck ran fine 2 owners ago last owner blew motor up and paked it over a large puddle for 1 year so things went bad

 

my friend says o2 sensors could that be it or speed sensor?

 

my truck is having the same problem what did you find out?