Loud Knock
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Senior User
Joined: May 2009
Posts: 110
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From: Osceola, WI
Loud Knock
Was up at the cabin yesterday snowmobiling. Temps got way down (around -20) and my 99 would not start. Put the heater on it, plugged in the block heater, charged the batteries and after a few cycles of the glow plugs and cranking for a bit it fired off sounding like it does on any other cold day. Let it warm for about 15-20 mins and shut it off because i was running somewhat low on fuel. 10 minutes later i restarted it and let it idle for another 15min before i took off. Drove 10 miles to get fuel, pull in and pop off my gas cap and all of a sudden a LOUD knocking noise is coming from the drivers side. I thought a rod let lose it was so damn loud. Still idled fine so i decided to put the sled trailer on my dads truck and drive it home. The loud knock went away after about a mile, but the truck runs very similar to when one of my injectors failed a month ago. Shakes under heavy load bet when wound out it seems to clear up a little.
Any words of advice would be appreciated!
Any words of advice would be appreciated!
Thread Starter
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Senior User
Joined: May 2009
Posts: 110
Likes: 0
From: Osceola, WI
Fuel was not that low, low fuel light had just come on. My gauge read 1/8 of a tank and at that point i usually have 5-6 gallons left atleast.
Alright i saw another post while searching that was very similar to my situation that had bent pushrods. Thought a valve might have stuck but the truck was only at idle for a few seconds?
Alright i saw another post while searching that was very similar to my situation that had bent pushrods. Thought a valve might have stuck but the truck was only at idle for a few seconds?
Fleet Mechanic
Joined: Feb 2005
Posts: 1,797
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From: Northern Colorado
That still leaves the poorly designed fuel pickup in the tank intact where you can suck air in at 1/4 tank. It will purge the fuel rail quickly when you fill up tho....
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Senior User
Joined: May 2009
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From: Osceola, WI
Good point. That may explain the knocking going away after a mile or so... but now it runs like crap just like when my injector failed. Maybe i should just dump some 911 in there and see if that helps quick.
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Thread Starter
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Senior User
Joined: May 2009
Posts: 110
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From: Osceola, WI
Thanks Mike I appreciate it!
I think I'll try some easy stuff first but i just wanted some opinions at first... with that terrible of noise i didn't want to cause anything catastrophic. Might have to run it on the AE once again. If the fuel additive doesnt fix it i'll pop off the valve cover and have a quick look also. What a week to have something go down... -'s all week.
I think I'll try some easy stuff first but i just wanted some opinions at first... with that terrible of noise i didn't want to cause anything catastrophic. Might have to run it on the AE once again. If the fuel additive doesnt fix it i'll pop off the valve cover and have a quick look also. What a week to have something go down... -'s all week.
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Senior User
Joined: May 2009
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From: Osceola, WI
Yeah i'd say. Now the question is why. Wet stacking is my assumption because this happened after sitting for a few -17 degree days. However i read a post by Izzy that wet stacking is not possible on the newer generation psd's? Now idk what to think. I did make the rookie mistake when i swapped injectors the first time and forgot to bleed the cylinders.... didnt even crank though. Possible they had a slight bend from that, and just took a while to let loose? truck did seem to run slightly strange.. with just like a tiny miss noticable unloaded at 2000-2300rpm.
