i have a strange problem with my 1990 Z71 K1500 4x4
it runs great for about 15 min then just stops and will not start again till its cooled off i have replaced the ign control mod/unit under the distributor this was not the problem next i tried replacing the coil this didnt do anything i also replaced the cap n rotor plug wires and put in new spark plugs and also replaced the inline fule filter located under the drivers cab so what can this be any one run across this problem? and know what is causing this ?
thanks if u can its a puzzle to me

Had a car that did that. Just got a cheap motor at a junkyard since it was a beater. The guy that did the swap said the oil pump was bad in it, but I don't see how that would'nt just lock the motor up not stall it. But i'm no mechanic.

Welcome to AF. You need to start with a few basics, when it dies does it still have spark and fuel? Check to see if there is still power to the fuel pump when it stops running, if not then you may need to replace the fuel pump relay.

Sounds like fuel pump relay.Had the same problem once.Good luck!

Thank You :)
Thanks for the information i will check it all and get back to you and tell u what i find out ^_^

Thank You :)
Thanks for the information i will check it all and get back to you and tell u what i find out ^_^
now that i have bought the new fuel relay switch it does not show where it is located in the manual and i cant see it anywhere
does anyone know where its located ?
thanks for the help ^_^

ok i found where the fuel pump relay was located on the firewall on the passenger side under a cover marked on the outside cover but dusty an dirty so i could not see it till i cleaned it some ^_^.
i replaced the fuel pump relay and this was NOT the problem..
does any one have any other thoughts or anyone that has had this problem ?
i will check the fuel pressure and spark soon and get back to u about what i find this has been a puzzle to figure out.:banghead:
Thanks to everyone for the help and thoughts on this problem :grinyes:

ok found the problem i checked the fuel and the spark they both were ok hum then i went to the front of the motor after it quit again an disconected the heat temp sending unit then it started right up well this was the problem it was faulty and this was a 15 dollar part :( what a hassle but its been a puzzle thats been solved thanks everyone for the help ^_^ :grinyes: