TBI 350 92 3/4 ton Cheyenne.
It stalls at idle after it warms up.
Replaced plugs, dist cap, rotor, rebuilt TBI (now it is a clean spray), replaced the pickup hose that split in the tank.
It is a former Navy rig, and had to clean up the distributor as it got a little rusty in there. The old dist cap and rotor were badly corroded on the contacts.

Runs excellant when cold, but once it warms up and sits at a stop light for 5 seconds it stalls 100% of the time. Try and ease it up the driveway is a pain, as it keeps stalling when warm.

engine light?

im suspecting the coolant temp sensor.

X2 coolant temp

I would be willing to bet the problem is coming from the distributor shaft, the magnets that are pressed onto it at the top under the rotor, are probably very weak and not producing the proper AC voltage for the magnetic pickup, it sounds far fetched but just inspect the magnets, u will more than likley see the epoxy oozing out from between them, its very common on TBI rigs, a new distributor shaft(its the only way to replace the pickup magnets) will run you about 70 dollars at the dealership.

I would be willing to bet the problem is coming from the distributor shaft, the magnets that are pressed onto it at the top under the rotor, are probably very weak and not producing the proper AC voltage for the magnetic pickup, it sounds far fetched but just inspect the magnets, u will more than likley see the epoxy oozing out from between them, its very common on TBI rigs, a new distributor shaft(its the only way to replace the pickup magnets) will run you about 70 dollars at the dealership.


i've had this happen to me on two different vehicles. as long as i was giving it gas it would run fine. if i ever let it sit and idle, it would die every time. seemed to be at random though. sometimes it would idle just a few seconds and die, sometimes it would idle for 1/2 an hour before it died. that magnet you speak of was cracked in both of mine.

Yeah it a common problem, I have seen it a dozen times, it only happens at idle because at even just a hair above idle there is enough rpm to produce the needed voltage