Hello everyone I’ve got me a 98 chevy c1500 thats had a whole list of things replaced and it still isn’t running right . Im just about out of ideas . Ive got what seems to be an electrical issue caused by moisture . Whenever moisture or humidity come into the air it doesn’t matter what i do the truck refuses to start . Without moisture normally it runs pretty great mechanically . It has had changed , plugs , wires , cap , rotor , distributor , fuel pump , fuel filter , injectors , and injector module , starter . Ive swapped a throttle body from my 96 tahoe onto it as well as the coil pack . Like i said unless its an electrical issue im out of ideas . Someone please help !

 

Something you might try,

Take an ordinary spray bottle filled with just plain water and carefully and selectively spray one area at a time. Mist it.
Wait a minute or two for a response.
If here is anything sensitive to moisture the spray will bring it out.

Let us know what you find, thanks.

 

does the truck need to be running because it wont stay running right now . Itll start run really rough and then die

 

My first question is have you done anything with the ecm? I believe it is on the drivers side of the truck between the battery box and the fuse box. I don’t know if their is any special procedure to replacing one, but I am wondering if it is having issues, because at this point, from what you are saying, it does not seem like it is a sensor. Maybe you could pull the one out of the good truck, and try putting it in, and see if it starts working. Before you did that, I would VERY highly recommend researching how to remove it with ought doing something to hurt it or the truck, because they are not cheap! If you can’t find anything elsewher, I would ask @Gumby22 . Good luck.

 

Starts, runs rough, dies, I would check the fuel pressure first. If the regulator is bad, good luck, it's arduous to change.