Hi everybody, This one has myself and a few car friends stumped I'll try to make a long story short and get to the current issue. I have a 97 GMC Sierra 2500, 5.7, rusty Ohio plow truck with only 127,000 on it,this was a great running truck until a couple months ago,here's the story. Died at work this summer ended up being a no fuel issue after all the common troubleshooting,replacing fuel pump etc. problem ended up being a dicey wire in the harness located after dropping the tank,soldered in 18" of new wire,dielectric grease,heat shrink,reassemble gas tank, done truck fires up but with a bad miss, I figure since it sat outside in the weather for several weeks it may just need driven,bad miss hard starting,runs terrible more or less intermittent, so I put on new cap and rotor which doesn't solve the problem which is getting worse every time I start the truck so I put in a cam sensor same issues this time the truck dies on a test drive no start sounds like it is out of time bad real bad,next move new crank sensor,the old one actually came apart and I had to get it out in three pieces, OK all should be good found my problem or so I thought,same no start,cranking like the timing is advanced way too much. I'm at a loss here everyone tells me there is no way it could be a timing chain with only 127,000, I have a wrecked parts truck with a 5.7 Vortec with 286,000 that is the best running vehicle I own. Any suggestions would be greatly appreciated.
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