Soooo, when the truck sits for a lil bit it'll fire up for a cpl mins then stall and then its nearly impossible to get it to start again and if you do it runs bad. Replaced map sensor and crank pos sensor. Checked fuel pressure again while it was running good and bad and its 45 psi the entire time. I can't figure this out for the life of me.

 

where did you get your crank sensor?

any codes?

 

It must be the pcm then.

 

It gives me codes 12,37, and 44 still. Crank pos sensor was from pepboys. I have 2 pcms and on both they both do the same thing. Damn truck runs then dies. Ima just roll it into the river an call it a day hahaha. But seriously this thing boggles my mind.

 

Just for S&G's, unscrew the pre cat o2 and see what happens.

 

and swap the asd relay for the horn relay.

 

Ima try the cat trick again. I did it once before but thats when the timing was messed up. And I did switch the asd relay and starter relay and it still cranked and all clicked when I turned the key. no start tho.

 

So keep in mind I tried the unplug the o2 sensor trick once before. That was before I checked the timing and it being 180 degrees out. Tried it today. Fired up. And finaaaaaaaaaaaaaaaally stayed running. Started it up multiple times, drove it round. Ran good and strong. So looks like i'm replacing the cat. Thanx to everyone who gave me different insight. Multiple pov's always help. =)

 

.................

 

Oh yea, I retract my previous statement of 100% sure of it not being the cat lol. I had multiple problems going on there and thanx for the link to that website Tweav88