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I have a vacuum leak coming from the back of the intake but not from the pcv or were the hoses for the pcv connect to the back of upper intake manifold but almost as if it were coming closer to the bell housing bolts but it seems like it is coming further down in that general area. Timing is on and it idles but about two or three mins of idling in park it jumps from 500rpm to 700rpm stays constant to around three to four mins then will drop back down to normal idle (500rpm) not sure what i got going on.
Periodically but mainly first time i start my truck in the morning cold or warm weather it takes three cycles of the key I have done a little research and it sounds like a fuel regulator or pump issue I have yet to check fuel pressure but when it does fire up it surges the(not exact but around the general area) rpm go from 300 up to 700 then back down to 300 or 400 then back up to 700 then to normal idling rpm. But other times it fires right up with out surge or hesitation with the truck. Cold or warm weather does not change this and same with temperature of the truck itself cold or warm running temp makes no difference. I had gotten told it could also be the cause of the air injection valve sticking? At times when accelerating from a dead stop per say a stop light it falls on its face but picks right back up and runs good. It also has been throwing code of random misfire so i bit the bullet and got new plugs wires and coils since i had been told by multiple people that the coils go out simultaneously but i still have a random miss fire cylinder 4 could this be related to my starting issue? But it does not feel like it has a miss while driving or under a load but i do have horrible gas mileage and the truck runs lean. A presence of fuel odor is strong if i let the truck idle? Any ideas?
I have a 2000 silverado 5.3 4 wheel drive and i just replaced all ball joints tie rod ends pit man arm and idler arm and ass with all new bushings upper and lower control arms end links and sway bar. i have gotten everything put back together but passenger side does not want to level out to the ride hieght. I may have popped the cv out of the knuckle but im not sure how to tell. The caster and camber bolts are lose along with the end links and lower control arm bolts and shock bolts but its binding up and i cant figure out why or where. As for the driver side it is at ride hiight and i had no problem. Hope i was detailed enough and can getsome help. Thank you