LS180 running problem.

My 180 starts fine but after around 15-20 minutes of regular use it will start to idle funny and then finally cut off. After about 5 minutes it will start back up and run for another 5-10 minutes and then do the same thing. I have changed the fuel filter, both air filters and the fuel solenoid on the left side of the engine. Don't know if there are anymore??? Any tips for solving this problem?

Try unscrewing the fuel cap sounds like the vent is pluged

antfarmer2 said:

Try unscrewing the fuel cap sounds like the vent is pluged

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Oh sorry I checked that also. Seems clear but its hard to tell. What about fuel pump?

chriscoe said:

Oh sorry I checked that also. Seems clear but its hard to tell. What about fuel pump?

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Could be........does it have a bleeder valve that might have vibrated loose or a cracked or loose line sucking air

antfarmer2 said:

Could be........does it have a bleeder valve that might have vibrated loose or a cracked or loose line sucking air

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Maybe a pluged pick up tube screen in the tank

antfarmer2 said:

Maybe a pluged pick up tube screen in the tank

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It does sound like the fuel tank cap is not venting, next time it stops run back and when you unscrew the cap listen for any sound of air going in. Otherwise maybe your fuel pump is dying when it gets warm, check the flow from the pump right after the engine dies.

jerry said:

It does sound like the fuel tank cap is not venting, next time it stops run back and when you unscrew the cap listen for any sound of air going in. Otherwise maybe your fuel pump is dying when it gets warm, check the flow from the pump right after the engine dies.

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thanks I'll try this when I get home this evening