will sugar mess up a diesel? i found sugar in a chop saw i had in the back of the truck today...I cant help but think it might be what is wrong???

OK my 05 is really acting up if you rev er up in park or neutral say to 2200 rpm the motor just hangs there banging out I can take my foot off the throttle and it will just sit on 2200-2000 rpm for ever until i pull it ino gear or turn the truck off????? It sounds like a JAP ROD running on the rev limiter popping and missing. The reason I noticed this is the truck has started idleing really rough and I tried patting the throttle to clear it up like an old gasser. The real issue is that the truck has started pinging really bad while exelerating. It sounds like an old gasser that the timming is way too far advanced.... Any ideas I went threw the rokers already and the lash was pretty good. I found a thread about the A/C wires rubbing and causing the motor to run bad. but my wires looked good.It really sounds like detonation.ANY IDEAS PLEASE?????

 

I would say you need to drain the fuel from your tank and check for sugar.

I doubt that it would be good on the injection pump or especially the injectors.

 

Running sugar through a motor is rumored to be a bad thing. . .when I was younger the story went that adding suger to someones tank would cause bad bad things to happen to the motor. Never tried it. . .thought about it once or twice.

 

Mythbusters tackled this one. They found mothballs were bad, but sugar didn't have much effect. However, the sediment issue of sugar is a good point, I can't imagine it being good at all...

 

I'm a big fan of locking fuel caps!

 

I had a customer with a classic Corvette end up with sugar in his gas tank. It gummed up the needle and seat in the carburetor, causing them to stick open. He ended up with a couple of bent connecting rods and a $4000 repair bill.

I wouldn't think it'd hurt a diesel near as much since the fuel is thicker but it can't be good for it.

 

I have seen Halloween candy in a fuel tank(gas) and the pistons were coated with stuck rings.Piston sides were actually sticky.

 

put a little it in the gas tank of an old tiller with a 5 horse briggs. about 1 min later it started squealing and locked up tight....

 

Look at your filter. It give you a quick idea.

Pete

 

Look down your filler neck.Unless you put fuel in it there ought to be grains of sugar stuck to the sides and around where the cap goes.

 

Here's the deep skinny from Science 101, folks - sugar or salt will not dissolve in Diesel fuel or gasoline - word up!

Liquidized sugar will crystallize and precipitate out.

However, if ya got water in yer fuel, shame on you!!

On the '05^, if any does get thru the pre-screen B4 the lift pump, the granules can 'sand-blast' the pastic vanes, even stop the motor, in sufficient quantity - if it gets thru the lift pump, the grains are way too large to navigate the 10micron filter interstices.

Unfortunately, if you got a HD Hi-Output aftermarket lift pump system, it can drive the granules thru the filter and into the inj pump - not even a pretty sight!

On the pre-'05's, with the filter-mounted lift pump, the grains will pass thru the rubber impeller to the filter, where they will stop - and, same result as above with the HD HO a\m LP system.

Now, if ya see sugar, or salt, or sand\dirt on the oil filler tube, ya gots big problems, because, even tho it won't dissolve in oil, the oil is dense enuff to easily carry the granules into the oil pump, then into the cooler, then into the filter, where they will hopefully stop - unless the filter is bypassing due to being plugged, then it's on into the bearings and stuff - but by then, the oil pump is already abraded and ate up

So, if you suspect foul play, it would behoove you to drop the tank and check it out, imo.

 

Looks like crystalized caramel in the cylinders. Nasty stuff. $$$$$$$$$ to fix.

Chris

 

Yep - I've heard of that thru the years, back when gassers (patooie!) with mechanical diaphragm draw-from-tank fuel pumps and carburetors never had fuel filters - don't really see how sugar could get thru modern highly-filtered systems, unless they were dissolving it in water first

Earlier this afternoon, I poured a 1/4 cup diesel fuel into a clear glass, then stirred in a teaspoon granulated sugar - or at east attempted to stir it in - the sugar looked like one of those cheap snow-scene globes long as I was stirring the fuel, but quickly settled and remained in a timid huddle on the bottom of the glass, even when I turned the glass on it's side to dump the fuel, just a minute ago, 8 hours after beginning the experiment - had to flush the teaspoon sugar out with hot water

Don't see how that would easily get thru today's highly-filtered systems, at all

 

Yeah, raw eggs in fuel isn't a good combination either. Went on a 4 month deployment up around the north pole. When I got back to the navy base, someone put an egg down my filler neck. Took the truck to a jeep dealer to have the tank cleaned. Found about a dozen eggs worth of shells and removed 5 gallons of gravel from the bottom of the tank. Whites decided to "cook" at the injectors. Nasty, and NOT covered under warranty.