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by **Ramrod90** » Sat Mar 07, 2009 11:03 am

Ok, so I was messin with my pump and turning in my full power screw. When I "bliped" the throttle it would imediatly come back down to down to idle. I turned it up a little more and the idle would fall about halfway and then "blip" again like i hit the throttle twice. like (Full throttle) WAAAAAooooooooWAAooooo (idle).LOL no other way to explain it. But the secondary blip would only raise the RPM a little bit not go all the way up, like a little hickup. Does this mean I am close to a runaway or is that normal. It doesnt do it while i'm driving or the engine is under a load. Thanks :lol:

by **PToombs** » Sat Mar 07, 2009 3:14 pm

I would say you're right on the edge! Back it out about 1/4 turn and it will be ok. I think Begle and a few others run theirs like that. It would make me nervous if it climbed or didn't drop while I was shifting.

by **Begle1** » Sun Mar 08, 2009 12:25 am

I've had the really erratic idle twice, where the slightest application of the throttle puts it into runaway.

If you turn in the screw, and get the erratic idle, don't give it fuel thinking that it's going to smooth out...

by **gear jammer 91"** » Sun Mar 08, 2009 12:14 pm

Begle ain't jokin! If it won't idle smooth after you screw with the screw, shut er' down and back the screw out a little, if you blip the throttle it will run away on you. Ask me how I know. :lol:

by **Ramrod90** » Sun Mar 08, 2009 12:38 pm

Right on thanks for the info! It doesn't seem erratic though, it hits the same curve every time with no stumbling or variation. So I need to adjust it back to where it just drops to idle? No spikes no matter how small?

by **gear jammer 91"** » Sun Mar 08, 2009 3:20 pm

From the sounds of it, you should be safe, but you are right on the edge. I would back the fuel screw out just enough so that it comes back to idle smoothly, but that's just me.

by **peobryant** » Sun Mar 08, 2009 11:52 pm

gear jammer 91" wrote:Begle ain't jokin! If it won't idle smooth after you screw with the screw, shut er' down and back the screw out a little, if you blip the throttle it will run away on you. Ask me how I know.

How do you know?

by **TWorline** » Mon Mar 09, 2009 5:30 pm

If you have never had one run away you don't know what you are missing!!! :shaking2:

by **Richie O** » Mon Mar 09, 2009 5:50 pm

My uncle had a 471 detroit run away on him. He slammed the emergency air shut off closed and cut the fuel line with his knife. She was sucking the engine oil and kept sputtering for a while. The air gate was letting in just enough so it would not stall completly.

by **Renigade** » Mon Mar 09, 2009 6:50 pm

I had a 300 hundred Mack runaway with me back in 82 going down the Ohio turnpike. She was maxed out and I finaly put it on the side of the road and Knocked both fuel filters off and it still sucked 2 gal of oil out of it before shutdown. Made me a little gun shy for awhile. :lol:

by **gear jammer 91"** » Mon Mar 09, 2009 7:55 pm

After I got done installing a 366 in my brothers truck, I thought I would just run the fuel screw in a ways before we started it, after all my truck will barley try to run away with the screw in all the way. Well my brothers truck reacted a little differently, it was idling really rough, like a gas engine with a radical cam and I thought it was just trying to clear a little air out of the pump, so I barely blipped the throttle, only it didn't come back down :shock:

. As the rpm started climbing I quickly pulled on the shut down lever and got er' stopped before things got out of control. It wouldn't have been so bad, but it wasn't my truck. :lol:

by **Richie O** » Tue Mar 10, 2009 7:45 am

Will the manual shut off kill a run away? Or do you need to board the turbo?

by **peobryant** » Tue Mar 10, 2009 8:20 am

Richie O wrote:Will the manual shut off kill a run away? Or do you need to board the turbo?

If it just starts, I think the maual shut off will kill it, but if the RPM's really start to skyrocket, then you need the board. I would always keep a board handy no matter what, though.

by **gear jammer 91"** » Tue Mar 10, 2009 4:33 pm

I had the hood open and blipped the throttle from the engine compartment, it had just barely started to rev and the shut down lever worked. I have been told that if the rpm's are already up there a ways that it won't kill the engine.
I forgot to tighten my idle screw after adjusting it once. It rattled loose and was holding the engine at 2000 rpm, when I shut the key off the r's came down to like 1000 rpm, but it didn't die. I think the shut down lever would have a similar effect on a runaway, but I'm not sure.

by **redneckroot** » Tue Mar 10, 2009 7:18 pm

When I adjusted my screw to go to a truck pull last year I had mine start the run away. Its a good thing my g/f was there with the 2x6 to kill it. Its a pretty scary feeling when it starts going on its own and the key doesn't work to kill it.

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