2006 Jeep Liberty flashing engine light and driving like crap till you gun the engine the drives fine for a bit and light stops

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swartz2448

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So this service engine light would flash drive poorly we would park it wait 15 mins it would drive fine again.. Did a seaform treatment through the gas tank now everytime we drive it the service engine light flashes and it drives like crap till you gun the engine then it straightens out till you shut it off and drive it the next time it has thrown many codes from fuel issue to multi mis fire to bad sensor.
 

tommudd

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Start with the basics
What codes is it showing , what are the numbers of the codes ?
 

tommudd

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Po300 is a code for raNDOM OR MULTI CYLIDER MISFIRES

P0151 is bank two sensor 1 oxygen sensor voltage is lower that it should be
 

LibertyTC

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Try not adding any seafoam to fuel.
How many miles on spark plugs? Are you using the correct Spark plugs?
Use NGK ZFR6F-11G
At around 120,000 miles it may need some new Coil packs as tune up item.
Post pics of your current plugs & gaps...
Bank2 oxygen sensor should be replaced with NGK brand.
 

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sota

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Po300 is a code for raNDOM OR MULTI CYLIDER MISFIRES

P0151 is bank two sensor 1 oxygen sensor voltage is lower that it should be

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@swartz2448 The seafoam treatment likely isn't related, as you had the underlying condition to start with.

If it's fine at cold start, crap after warms up, then fine after you romp on it, that's making me think the heating element in the sensor isn't performing correctly. (I don't remember if the NGC3 computer monitors the heater or not.)
The computer is...
* in Open Loop at start up
* goes Closed Loop after warm up
* runs like crap because the sensor is throwing bad data
* goes Open Loop again at WOT
* that dumps a bunch of heat into the exhaust and warms the sensor enough to start working at least somewhat correctly.
* Then when you shut it off, everything cools down.

I'd be willing to bet it'll also run like poo if you do a really long closed throttle coast down, as everything will cool off, then run fine again after another flogging.

Get the correct NTK sensor, and probably should pick up 2 (they're not usually that expensive) so you have a spare when bank 2 craps out on you. :)
 

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