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91 Pathfinder Bogging


kts96
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My Pathy is bogging when I stomp the gas to the point that it wants to die out. I have checked for codes and found none. I have changed the following to no avail. Distributor, Wires, Plugs, Fuel Filter, Fuel Pump. Any ideas?

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Auto or stick? Year? Mileage?

 

Sounds like you might be getting a lean mixture. Check your air intake hose coming from the air filter to make sure it is in good repair and not cracked. Also, check your vacuum hoses. To do this, start your engine and let it idle as you squirt wd40 or starter fluid or even propane around the vacuum hoses. Listen for a surge in the idle (caused by the engine sucking in the combustible gas). Once you hear the surge you know you have found a leaky vacuum hose.

 

I would start there if I were you, I'm sure someone else will have suggestions for other possible causes.

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unplug the O2 sensor under the hood and see if it changes. When troubleshooting, only change 1 thing at a time, then test to see if the problem goes away.

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