Engine shuts off instead of idling down when compressor is full

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The engine runs great until compressor gets full then the engine quits, says Paul Brown of Tupelo MS USA.

What make and model? Hard to offer specifics without knowing that, says Doug of s.d.ca.

Does it shut down as if turned off, or does it lug down and die?

Does the throttle move to idle or stay at full?

What is the normal cut-off pressure, and what pressure does it get to?

Is this a new problem since you’ve owned it, or was it someone else’s?

Unfortunately, Paul didn’t come back with any further information about his compressor, so his original question stalled. But then, others picked up on the same issue, and added questions and comments below.

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dewalt gas compressor with a honda 5.5hp model D55270

engine starts up fine and builds pressure as it should then once its filled the tanks to 125 psi when the engine switches over to idle it only will idle about 4/5 seconds then shuts off. no lug sputter or anything. just as if you turn it off. the lever on the engine does move it just cuts off. sometimes it may idle 6/8 seconds then die and sometimes may only 2/3 seconds

Hmmm. AFAICT, that’s maybe a DXCMTB5590856 from HD?
The D55270’s I’m finding don’t have Honda engines. If it’s really a D55270, what TYPE?
Be that as it may, and despite that it doesn’t seem to lug down, have you checked the unloader valve is clear?
Have you checked anything else?

I have the same issue
But mine lugs out and dies,
As if the engine doesnt have enough guts to keep on turning.
I can start it back up in idle but it cuts out at top end of every cycle.
I thought it might be when the pneumatic lever engages to put it into idle is actually pushing it too far.

George:
Quite possibly. I’d guess there’d be instructions in your manual on how to adjust, if it’s adjustable. It may not be…in which case you could try some carb cleaner.

I did kind of fix it, I ended up just adjusting the position of the pneumatic pusher to engage the idle, i pushed it back a fraction so its a little leeway above idle. That and not running it on max, So when the unloader valve engages the engine isnt dropping down so far. A shorter rev range on the cycle, I imagine the engine should be able handle dropping from max rev to lowest revs on idle when the unloader valve engages but its not. So its a workaround. As its a brand new compressor and this was second… Read more »

Other than returning it? ‘Fraid not.
“I imagine the engine should be able handle dropping from max rev to lowest revs on idle when the unloader valve engages but its not. So its a workaround. ”
Yes. So there’s not an idle adjusting screw? Is it CARB (California) approved?

no no, I’m from Australia and this was a chinese import 😛

Doesn’t have something as flash as an idle adjusting screw.

Well, then I hope it keeps working for ya…