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Bad Knock After Fuel Filter + Cetane Change - E450
Ok...I'm putting the description back here because people are responding to this thread, sorry about the double post:
I just bought a box truck and it had the "water in fuel" light on. It drove fine, but had an occasional chug/lug and the "water in fuel" light would flicker. I went ahead and pulled the filter and drained the bowl. I was told to put some cetane booster in the bowl before I replaced the filter, so I did so and buttoned the whole thing up.
Well, I went to go start it and there was a really loud knock in the motor. There was also quite a bit of smoke coming out of the exhaust set-up, pre and post turbo like there was high exhaust pressure (i'm not sure if this was happening before the repair or not). I turned it over a couple more times thinking the cetane booster could be doing something funny and wanted to try and run it out, but the motor was knocking too loud and i didn't want to damage the motor. I've heard these motors can knock and ping and be just fine, but this was loud.
Questions? Would cetane booster in the bowl cause this scenario? Will it run through without causing any problems? Should I maybe open it back up and add diesel or ATF in the bowl? Is the seemingly high pressure in the exhaust (it has 188K and could probably use tightening on the clamps) a byproduct of the booster? Any advice or suggestions would be greatly appreciated.
7.3 PSD 1997 E-450 Box Truck
Last edited by synetrics; 04-03-2010 at 07:10 PM.
Reason: Listed in wrong category, see engine 911