BD turbo won't start after running out of gas

[specialk6r]

2010 M8 w/ BDPG kit. Last night I drained the old gas (last ride there was a new bog similar to what my M7 does with old gas) and added 1 gallon of race fuel just to get the sled in my truck on the way to the gas station. I warmed the sled up and hit reverse, and as soon as I touched the gas it died. I added a full tank of 91 and it will just barely run but only if I hold the throttle WFO. I tried squirting starting fluid, then gas into the cylinders and it doesn't even rev up. It has spark, but doesn't seem to burn the starting fluid.

I can hear the fuel pump running and it doesn't appear to be fused. Any suggestions?

 

[RACINSTATION]

Reach into the tank. When you run them out of fuel the smart valves in the tank snap shut. There are three round pickups that you will feel. Make sure all three are on the bottom of the tank pointing down and that all 3 over them spring back when you push them in.

 

[specialk6r]

When I push on the bottoms (white screen) of the smart filters they collapse then push back out. I still don't understand why it won't burn the gas I put in the cylinder. Thanks

 

[WyoBoy1000]

If you put gas in the cylinder, make sure key and run switch is on, if nothing check for spark.

 

[specialk6r]

It's got spark, and it just barely stays running if I hold the throttle to the bar. I can hear the fuel pump running rather loudly. The tank is now topped with fuel.

 

[gus bohne]

NO REEDS LEFT !!!!

you must have blown out a complete set of petals,, they wont run at all ..

Gus

 

[specialk6r]

What are the odds that the sled started 2nd pull, idled perfect for 5 minutes, switched to reverse, then the reeds disappeared as soon as I touched the throttle?

Update: I just hooked the fuel pump up to a motorcycle battery for 15-20 seconds and it made no difference.

 

[gus bohne]

What are the odds that the sled started 2nd pull, idled perfect for 5 minutes, switched to reverse, then the reeds disappeared as soon as I touched the throttle?

Update: I just hooked the fuel pump up to a motorcycle battery for 15-20 seconds and it made no difference.

stranger things man,, after all these yrs,,, stranger things.....

Gus
unplug coolant temp sensor and retry starting....

 

[specialk6r]

One more note: when I run the fuel pump with the battery + to the red fuel pump wire, it blows small bubbles in my tank. Is this normal?

 

[WyoBoy1000]

Do you have a fuel pressure gauge, if not I would check pressure, maybe the pump went south. Its normal for the fuel to move around in the tank, the pressure regulator dumps excess fuel back into the tank, although there is a line on the bd kits that runs from the charge tube into the tank and attaches to the regulator, if that comes off it will cause problems.

Its worth checking the reeds too, it crossed my mind but figured its not likely.
Also try reversing the polarity on the pump and run it backwards for a few seconds then forward and try again.

Are the pistons and cylinder good, i e good compression

 

[specialk6r]

I don't have a FP gauge, but the pump is working enough to pressurize the fuel line. Interestingly enough, the sled runs (just barely) whether or not the fuel pump is plugged in. I did try reversing polarity too. Through the exhaust ports and plug holes the pistons and cylinders look perfect, and the compression is 95 in both sides. It's been this way and running perfect. I believe the domes have been cut.

I should probably check the TPS and maybe pull the injectors while I'm down there, although I'm not sure how to diagnose a stuck injector. Where is the water temp sensor on these?

 

[mynewuseddoo]

Seeing as you've already hooked the fuel pump up to the battery, I'm gonna agree with Gus here, reeds. You don't need to be at WOT to have a reed petal crack or let go. It could have just been fatigued enough and it was its time to crack. This happened to my buddies M8. Fired it up, on the trail ride down the mountain, no heavy snow, down hill trail. Started to go and blaa, reeds. Time to grab a rope lol.

 

[Snowjunky]

Not trying to insult you but I assume you have changed the plugs to NEW ones?

 

[specialk6r]

No offense taken - too easy to overlook something. But yes, new plugs gapped to BD specs. I've got a set of M1000 reeds and Racinstation's extented stops on the bench, so I'll report back tomorrow.

 

[Unregisteredf650]

good chance its the micro switch in the throttle if you press throttle ever
so gentle you hear a click un plug switch and try it happened to me in the mountains cheeked everything for 2 to 3 hours ended up being the switch

 

[WyoBoy1000]

No matter if fuel is getting to the rail or not it has to be a certain pressure, if not in range it will not run right. you have to know the actual pressure, fuel or not. If it is running without pump plugged in there must be lots of fuel left in the engine from what was poured in. Try this, turn key or switch to not run, hold down throttle and pull over 3-10 times, then turn key on hold down throttle and pull.

 

[specialk6r]

Weird update: So the sled will run and rev up IF the exhaust pipe springs are unhooked giving the exhaust somewhere to go. As soon as I push the pipe tight against the donut on the y-pipe it chocks and dies.

So the next thing down stream is the turbo. I sure hope it's not locked up, but the wastegate is in the closed position, and I disconnected the actuator rod and opened and closed the wastegate by hand and it made no difference. New guesses? Thanks for sticking with me fellas.

More info: I pulled the can and looked inside the turbo. The wheel inside spins freely and the wastegate can open and close with normal pressure. I also checked and the oil pump works the same whether the engine is running or it's hooked to a battery.

 

[specialk6r]

As this saga comes to an end I come to you, members of the forum, on bended knee asking for forgiveness for my dumba$$ness.

So, what caused me to miss a weekend of riding in favor of cursing life in the garage? A TUBE SOCK in the exhaust pipe leading to the turbo. Every time I pull the pipe I protect the vitals by stuffing clean rags in the pipes, and this time I left one in there. Anyhow, no harm no foul. It stopped before the turbo, and after unflooding the engine all is well.

 

[rusty rider]

As this saga comes to an end I come to you, members of the forum, on bended knee asking for forgiveness for my dumba$$ness.

So, what caused me to miss a weekend of riding in favor of cursing life in the garage? A TUBE SOCK in the exhaust pipe leading to the turbo. Every time I pull the pipe I protect the vitals by stuffing clean rags in the pipes, and this time I left one in there. Anyhow, no harm no foul. It stopped before the turbo, and after unflooding the engine all is well.

LOL! This type of sh!t happens to the best of us! Bet that will learn ya.

 

[snowmanx]

As this saga comes to an end I come to you, members of the forum, on bended knee asking for forgiveness for my dumba$$ness.

So, what caused me to miss a weekend of riding in favor of cursing life in the garage? A TUBE SOCK in the exhaust pipe leading to the turbo. Every time I pull the pipe I protect the vitals by stuffing clean rags in the pipes, and this time I left one in there. Anyhow, no harm no foul. It stopped before the turbo, and after unflooding the engine all is well.

LOL, when I read your previous post I was going to say check the can and as it sounds like it is blocked off! lol Funny stuff, but cant tell you how many times and hours I've spent on my sled only to find I overlooked something silly. Glad you got her going.