Donna Morris

Hey guys. I need some help. My 2001 4.2 v6 truck just won't run. The original block was busted on the truck when we got it. Found another one from a wrecked truck but the engine didn't have any damage to it other than a busted fan. Traded out the fan for the one that came with the truck. The injectors and spark plugs look brand new, fixed the fuel pump issue, and replaced all freeze plugs, and changed the oil. It has 35-40 fuel pressure and we just can't figure it out. Please help!!

Spanky666

What is it doing when you hit the key? Missing alot of info here

Donna Morris

When the keys in the on position, all lights come on and the pump comes on and cycles through. When we crank it, it turns over. I'm sorry for the lacking info. I'm going off what my grandfather explains to me as I am still learning.

Spanky666

Is it trying to fire at all or just spinning over and over? Try pulling one of the spark plug wires slightly out of the ignition coil while turning the truck over to see if it will arc from the coil to the spark plug end. Should only have to pull it out about half an inch. There should be a very distinct POP sound like a taser. That will tell you if you're getting a spark. If yes, move on to the next one. Do that for all 6 plug wires and then get back to me.

Donna Morris

It's trying to fire, yes.

Spanky666

See edited post above.

Also, check air filter. As silly as it may seem, if it's not getting enough air, it wont run. If the air-filter looks questionable, remove and try running it for a short amount of time. If it runs, it needs a new air filter. Given the info we have so far, these are wild stabs until we know what is and what isn't.