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Hi everyone. I'm hoping someone can help me. Recently, my wife was using the Gator and it ran out of gas. When I filled the tank back up, it started, but when you push the gas, it bogs down and dies. Then it will not start back unless you hold the gas pedal all the way down to the floor. It cranks and cranks and will finally start, but it smokes really bad and will not idle. It almost sounds like it's running on one cylinder.

After reading another forum, I changed the spark plugs, changed the oil and oil filter, and changed the air and fuel filters. This didn't help at all. Now, the Gator will start right up and idle when it's cold, but when it warms up, it goes to missing again and will not idle. To start it again, you have to hold the gas to the floor and once it starts, it misses horribly and blows smoke. It almost seems like it is flooding itself.

What I've done so far:
I added Sea Foam to the fuel thinking it might clear it up. No change.
I'm running 87 octane fuel with no Ethanol.
I've taken the air intake tube off and sprayed throttle body cleaner in the throttle body and no change.
I've disconnected the connectors on the two sensors on the front side of the throttle body and that seems to clear up the problem, but when it starts running good again, the idle will not go down. It sounds like it's running half wide-open. I'm not sure what those sensors are since the John Deere parts manual only says sensor. The only way to get it to idle down is to remove the wire connector from the pressure sensor located on the driver's side of the throttle body.

I've thought about replacing the two sensors on the front side of the throttle body, but I don't know if they're bad or not and I hate to throw down $300 for something that will not fix the problem. Is there any way to test those sensors to see if they are bad? Anyone else had this problem?
 

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Since it started after running out of fuel, I'd start there. Maybe there was some junk floating in your tank and when it got to the bottom the pickup tube sucked it up and is blocking the hose to your pump? Check fuel pressure. It should be 25psi.
 

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When fuel injected machines are run out of gas, then refilled, there could be air in the lines to the injectors. Consequently the lines have to be slightly loosened at the fuel pump to bleed the air blockage out. Close the nut quickly when pure fuel dribbles out.; do for both cylinders.when finished let the gas that spilled out evaporate (half hour) before starting. Then start and check for leaks.
HOWEVER- First I would suggest you call the dealer to find out if your fuel system is self-bleeding, or has a bleed screw. I can’t remember....
Go from there accordingly.
 

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Was this problem ever solved? Mine won't start or idle with the pressure sensor on the throttle body plugged in! Unplug it and it fires right up and idles but if you touch the accelerator it bogs it down like it's in limp mode
 

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Same problem with my explorer and found out it's symptomatically related to fuel pressure regulator on the fuel rail.
 

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i hate to steal your thread... is there anyway you can show me where your ground cables are located for the motor, there’s a thick one from the battery and two small ones grouped together?

just did an engine swap on a 620 and having trouble. Lol
Thanks
 
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