Hi,
I have an '85 6.2 with a 94'ish 6.5 turbo see http://forum.thedieselpage.com/cgi-b...c;f=1;t=008503 for pics. This is my second 6.2, but the turbo stuff is all new to me. When I bought the truck the owner said that he normally ran about 7 psi max boost, but a mechanic buddy of his thought that was too low and "cranked up the pump". Now it runs about 10psi under moderate accel, and 14 at WOT. I see about 7 PSI while cruising. Is this too much? Every once in a while I get a little surge while cruising at 65+ MPH and I see the boost guage jump about 3 PSI (speed jumps about 3-4 mph too), I also feel an occaisional sag and see the boost drop. In either case, it isn't that objectionable, but I know it isn't right and would like some pointers on what the cause may be.
2nd issue: It is a hard start when cold. My other 6.2 with a manual GP switch and AC 60G's would start without plugging in at 20 below. My new truck is a hard start at 40 above. The glow plugs are all new (as per the previous owner - they look new too - took most of them off cause previous owner didn't use anti-sieze). The thing cranks fast. When cranking I can hear one or two cylinders firing, I get tons of white smoke mixed with some black. When it does begin to run, it takes a few seconds for all of the other cylinders to come alive. I don't think all of my plugs are working right, but am not sure. Is there a good way to test glow plugs? Hot it starts almost instantly. When plugged in for a few hours, it starts easier, but not as easy as my other 6.2 does without plugging in...
Last issue: My "water in fuel" light comes on when I accelerate. On my last truck I would have changes the fuel filter on the firewall, but this truck doesn't have one (see pic at link above). Since I have no manual, what should I do.
Any help is greatly appreciated.
Thanks!