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thom2and

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  1. The problem went away for a while, but now it's back. This is on an 08 gu713 granite. All I did was plug and unplug the 3 connectors on the back side of the cluster. The cluster goes in and out anytime, but primarily at start up. The cluster will also lock during operation (all gauges stick at current position). The only way to unlock, is to disconnect the ground at the battery. Cycling the key on and off does nothing. The pdf you attached earlier is for 2002 models and older. Is there something similar for the 2008 models? Any help is appreciated.
  2. Where can I get a copy of this "bulletin"? I would like to know where to find all the grounds.
  3. The plastic cap seems to be dry while priming. The check valve on the secondary nipple my be damaged. The ball seems to move ok now, but I have about 1/4" of free travel before there is any resistance from the spring. Once the ball makes contact with the spring I have another 1/2 inch of travel. If the check valve is damaged. Is it possible for fuel to drain back through the return line?
  4. I have completely bypassed the davco and it still drains back. I also installed another check valve to ensure the davco wasn't leaking back. Thanks.
  5. Thank you for the suggestions. I'll look into it. This is a strange deal. On a rare occasion it will hold its prime, but rare. Also, I have only one filter on the filter housing. The other is capped.
  6. I have a 2008 granite with a MP8. Truck has 55,000 miles and about 2200 hrs. It's looseing fuel overnight. In the morning when I try starting it, it will fire and idle for what seems like less than a second then dies. When I try starting it again it just cranks and cranks, if you keep on it will finally start. What seems to work the best (before trying to start engine) is to open the hood and use the hand fuel primer until I get pressure.(anywhere from 30 to 60 pumps with the primer, I can here a gurgle in the fuel tank when doing this) Then it will start immediately, but will stumble and smoke a little until air is cleared from the system. Actions I have taken: replaced check valve on front of head, bypassed Davco fuel filter/heater, changed fuel filters, checked for loose fuel lines. Engine performance seems good. Hot starts are not a problem. This has been an ongoing problem all summer. Just recently I have had 2 different fault codes: p94 and pp328. The codes have come when truck is just started, after engine levels out, the lightening bolt disappears. Any thoughts or suggestions?
  7. I have a 2008 Mack with the MP8, 485 hp, and about 40,000 miles. Lately it's been asking for a regen every couple of days. During the regen process the exhaust temp doesn't go over 600*F. I've been told the 7th injector needs cleaning. I'm wondering if anyone knows how to do this. Also, is a gasket kit needed to reassemble? Any help is appreciated.
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