Timing troubles, I think!!!!!HELP, It's driving me nuts - Diesel Truck Forum - TheDieselGarage.com
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post #1 of 3 (permalink) Old 07-19-2007, 12:40 AM Thread Starter
 
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Unhappy Timing troubles, I think!!!!!HELP, It's driving me nuts

I have an early 99 with a PMT1 computer tuned by Jody. I have Jody's tunes for big oil. I can tow in 40t and 60T with more power than I had available before and no problems. Tows up hills in overdrive that I could barely get up in drive before.

Now, when I use 120 race or 140 extreme at WOT there is a rattling sound(almost like pinging), boost drops plus I can hear the truck change sounds. When I back off the throttle it stops and boost/power picks back up. We(Jody and I) have been fighting this problem for about 6 weeks. I already emailed Jody this same info.

Please tell me I am not the only one to have any troubles like this...

Thanks
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post #2 of 3 (permalink) Old 07-19-2007, 03:44 AM
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Your fuel pressure is dropping.
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post #3 of 3 (permalink) Old 07-19-2007, 03:56 AM Thread Starter
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My Autometer in cab fuel pressure guage says my fuel pressure is 64 at idle and drops to 56 at WOT. I have it attached to the bowl. Maybe I need to tap it into the fuel lines.
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